man page cmake-modules section 7

cmake-modules(7)                     CMake                    cmake-modules(7)

NAME

       cmake-modules - CMake Modules Reference

       The modules listed here are part of the CMake distribution.  Projects
       may provide further modules; their location(s) can be specified in the
       CMAKE_MODULE_PATH variable.

UTILITY MODULES

These modules are loaded using the include() command.

AndroidTestUtilities
Added in version 3.7.

Create a test that automatically loads specified data onto an Android
device.

Introduction
Use this module to push data needed for testing an Android device
behavior onto a connected Android device. The module will accept files
and libraries as well as separate destinations for each. It will create
a test that loads the files into a device object store and link to them
from the specified destination. The files are only uploaded if they are
not already in the object store.

For example:

include(AndroidTestUtilities)
android_add_test_data(
example_setup_test
FILES <files>...
LIBS <libs>...
DEVICE_TEST_DIR "/data/local/tests/example"
DEVICE_OBJECT_STORE "/sdcard/.ExternalData/SHA"
)

At build time a test named "example_setup_test" will be created. Run
this test on the command line with ctest(1) to load the data onto the
Android device.

Module Functions

android_add_test_data

android_add_test_data(<test-name>
[FILES <files>...] [FILES_DEST <device-dir>]
[LIBS <libs>...] [LIBS_DEST <device-dir>]
[DEVICE_OBJECT_STORE <device-dir>]
[DEVICE_TEST_DIR <device-dir>]
[NO_LINK_REGEX <strings>...]
)

The android_add_test_data function is used to copy files and
libraries needed to run project-specific tests. On the host
operating system, this is done at build time. For on-device
testing, the files are loaded onto the device by the
manufactured test at run time.

This function accepts the following named parameters:

FILES <files>...
zero or more files needed for testing

LIBS <libs>...
zero or more libraries needed for testing

FILES_DEST <device-dir>
absolute path where the data files are expected to be

LIBS_DEST <device-dir>
absolute path where the libraries are expected to be

DEVICE_OBJECT_STORE <device-dir>
absolute path to the location where the data is stored
on-device

DEVICE_TEST_DIR <device-dir>
absolute path to the root directory of the on-device test
location

NO_LINK_REGEX <strings>...
list of regex strings matching the names of files that
should be copied from the object store to the testing
directory

BundleUtilities
Functions to help assemble a standalone bundle application.

A collection of CMake utility functions useful for dealing with .app
bundles on the Mac and bundle-like directories on any OS.

The following functions are provided by this module:

fixup_bundle
copy_and_fixup_bundle
verify_app
get_bundle_main_executable
get_dotapp_dir
get_bundle_and_executable
get_bundle_all_executables
get_item_key
get_item_rpaths
clear_bundle_keys
set_bundle_key_values
get_bundle_keys
copy_resolved_item_into_bundle
copy_resolved_framework_into_bundle
fixup_bundle_item
verify_bundle_prerequisites
verify_bundle_symlinks

Requires CMake 2.6 or greater because it uses function, break and
PARENT_SCOPE. Also depends on GetPrerequisites.cmake.

DO NOT USE THESE FUNCTIONS AT CONFIGURE TIME (from CMakeLists.txt)!
Instead, invoke them from an install(CODE) or install(SCRIPT) rule.

fixup_bundle(<app> <libs> <dirs>)

Fix up <app> bundle in-place and make it standalone, such that it can
be drag-n-drop copied to another machine and run on that machine as
long as all of the system libraries are compatible.

If you pass plugins to fixup_bundle as the libs parameter, you should
install them or copy them into the bundle before calling fixup_bundle.
The <libs> parameter is a list of libraries that must be fixed up, but
that cannot be determined by otool output analysis (i.e. plugins).

Gather all the keys for all the executables and libraries in a bundle,
and then, for each key, copy each prerequisite into the bundle. Then
fix each one up according to its own list of prerequisites.

Then clear all the keys and call verify_app on the final bundle to
ensure that it is truly standalone.

Added in version 3.6: As an optional parameter (IGNORE_ITEM) a list of
file names can be passed, which are then ignored (e.g. IGNORE_ITEM
"vcredist_x86.exe;vcredist_x64.exe").

copy_and_fixup_bundle(<src> <dst> <libs> <dirs>)

Makes a copy of the bundle <src> at location <dst> and then fixes up
the new copied bundle in-place at <dst>.

verify_app(<app>)

Verifies that an application <app> appears valid based on running
analysis tools on it. Calls message(FATAL_ERROR) if the application is
not verified.

Added in version 3.6: As an optional parameter (IGNORE_ITEM) a list of
file names can be passed, which are then ignored (e.g. IGNORE_ITEM
"vcredist_x86.exe;vcredist_x64.exe")

get_bundle_main_executable(<bundle> <result_var>)

The result will be the full path name of the bundle's main executable
file or an error: prefixed string if it could not be determined.

get_dotapp_dir(<exe> <dotapp_dir_var>)

Returns the nearest parent dir whose name ends with .app given the full
path to an executable. If there is no such parent dir, then simply
return the dir containing the executable.

The returned directory may or may not exist.

get_bundle_and_executable(<app> <bundle_var> <executable_var> <valid_var>)

Takes either a .app directory name or the name of an executable nested
inside a .app directory and returns the path to the .app directory in
<bundle_var> and the path to its main executable in <executable_var>.

get_bundle_all_executables(<bundle> <exes_var>)

Scans <bundle> bundle recursively for all <exes_var> executable files
and accumulates them into a variable.

get_item_key(<item> <key_var>)

Given <item> file name, generate <key_var> key that should be unique
considering the set of libraries that need copying or fixing up to make
a bundle standalone. This is essentially the file name including
extension with . replaced by _

This key is used as a prefix for CMake variables so that we can
associate a set of variables with a given item based on its key.

clear_bundle_keys(<keys_var>)

Loop over the <keys_var> list of keys, clearing all the variables
associated with each key. After the loop, clear the list of keys
itself.

Caller of get_bundle_keys should call clear_bundle_keys when done with
list of keys.

set_bundle_key_values(<keys_var> <context> <item> <exepath> <dirs>
<copyflag> [<rpaths>])

Add <keys_var> key to the list (if necessary) for the given item. If
added, also set all the variables associated with that key.

get_bundle_keys(<app> <libs> <dirs> <keys_var>)

Loop over all the executable and library files within <app> bundle (and
given as extra <libs>) and accumulate a list of keys representing them.
Set values associated with each key such that we can loop over all of
them and copy prerequisite libs into the bundle and then do appropriate
install_name_tool fixups.

Added in version 3.6: As an optional parameter (IGNORE_ITEM) a list of
file names can be passed, which are then ignored (e.g. IGNORE_ITEM
"vcredist_x86.exe;vcredist_x64.exe")

copy_resolved_item_into_bundle(<resolved_item> <resolved_embedded_item>)

Copy a resolved item into the bundle if necessary. Copy is not
necessary, if the <resolved_item> is "the same as" the
<resolved_embedded_item>.

copy_resolved_framework_into_bundle(<resolved_item> <resolved_embedded_item>)

Copy a resolved framework into the bundle if necessary. Copy is not
necessary, if the <resolved_item> is "the same as" the
<resolved_embedded_item>.

By default, BU_COPY_FULL_FRAMEWORK_CONTENTS is not set. If you want
full frameworks embedded in your bundles, set
BU_COPY_FULL_FRAMEWORK_CONTENTS to ON before calling fixup_bundle. By
default, COPY_RESOLVED_FRAMEWORK_INTO_BUNDLE copies the framework dylib
itself plus the framework Resources directory.

fixup_bundle_item(<resolved_embedded_item> <exepath> <dirs>)

Get the direct/non-system prerequisites of the
<resolved_embedded_item>. For each prerequisite, change the way it is
referenced to the value of the _EMBEDDED_ITEM keyed variable for that
prerequisite. (Most likely changing to an @executable_path style
reference.)

This function requires that the <resolved_embedded_item> be inside the
bundle already. In other words, if you pass plugins to fixup_bundle as
the libs parameter, you should install them or copy them into the
bundle before calling fixup_bundle. The libs parameter is a list of
libraries that must be fixed up, but that cannot be determined by otool
output analysis. (i.e., plugins)

Also, change the id of the item being fixed up to its own
_EMBEDDED_ITEM value.

Accumulate changes in a local variable and make one call to
install_name_tool at the end of the function with all the changes at
once.

If the BU_CHMOD_BUNDLE_ITEMS variable is set then bundle items will be
marked writable before install_name_tool tries to change them.

verify_bundle_prerequisites(<bundle> <result_var> <info_var>)

Verifies that the sum of all prerequisites of all files inside the
bundle are contained within the bundle or are system libraries,
presumed to exist everywhere.

Added in version 3.6: As an optional parameter (IGNORE_ITEM) a list of
file names can be passed, which are then ignored (e.g. IGNORE_ITEM
"vcredist_x86.exe;vcredist_x64.exe")

verify_bundle_symlinks(<bundle> <result_var> <info_var>)

Verifies that any symlinks found in the <bundle> bundle point to other
files that are already also in the bundle... Anything that points to
an external file causes this function to fail the verification.

CheckCCompilerFlag
Check once whether the C compiler supports a given flag.

check_c_compiler_flag

check_c_compiler_flag(<flag> <resultVar>)

Check once that the <flag> is accepted by the compiler without a
diagnostic. The result is stored in the internal cache variable
specified by <resultVar>, with boolean true for success and boolean
false for failure.

true indicates only that the compiler did not issue a diagnostic
message when given the flag. Whether the flag has any effect is beyond
the scope of this module.

Internally, try_compile() is used to perform the check. If
CMAKE_TRY_COMPILE_TARGET_TYPE is set to EXECUTABLE (default), the check
compiles and links an executable program. If set to STATIC_LIBRARY, the
check is compiled but not linked.

See also check_compiler_flag() for a more general command syntax.

The compile and link commands can be influenced by setting any of the
following variables prior to calling check_c_compiler_flag(). Unknown
flags in these variables can case a false negative result.

CMAKE_REQUIRED_FLAGS
String of additional flags to pass to the compiler. The
string must be space-delimited--a ;-list will not work. The
contents of CMAKE_<LANG>_FLAGS and its associated
configuration-specific variable are automatically added to
the compiler command before the contents of
CMAKE_REQUIRED_FLAGS.

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_INCLUDES
A ;-list of header search paths to pass to the compiler.
These will be the only header search paths used--the contents
of the INCLUDE_DIRECTORIES directory property will be
ignored.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckCompilerFlag
Added in version 3.19.

Check once whether the <lang> compiler supports a given flag.

check_compiler_flag

check_compiler_flag(<lang> <flag> <resultVar>)

Check once that the <flag> is accepted by the <lang> compiler without a
diagnostic. The result is stored in the internal cache variable
specified by <resultVar>, with boolean true for success and boolean
false for failure.

true indicates only that the compiler did not issue a diagnostic
message when given the flag. Whether the flag has any effect is beyond
the scope of this module.

The compile and link commands can be influenced by setting any of the
following variables prior to calling check_compiler_flag(). Unknown
flags in these variables can case a false negative result.

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckCSourceCompiles
Check once if C source code can be built.

check_c_source_compiles

check_c_source_compiles(<code> <resultVar>
[FAIL_REGEX <regex1> [<regex2>...]])

Check once that the source supplied in <code> can be built. The
result is stored in the internal cache variable specified by
<resultVar>, with boolean true for success and boolean false for
failure.

If FAIL_REGEX is provided, then failure is determined by
checking if anything in the compiler output matches any of the
specified regular expressions.

Internally, try_compile() is used to compile the source. If
CMAKE_TRY_COMPILE_TARGET_TYPE is set to EXECUTABLE (default),
the source is compiled and linked as an executable program. If
set to STATIC_LIBRARY, the source is compiled but not linked. In
any case, all functions must be declared as usual.

See also check_source_compiles() for a more general command
syntax.

See also check_source_runs() to run compiled source.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_c_source_compiles():

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckCSourceRuns
Check once if given C source compiles and links into an executable and
can subsequently be run.

check_c_source_runs

check_c_source_runs(<code> <resultVar>)

Check once that the source supplied in <code> can be built,
linked as an executable, and then run. The <code> must contain
at least a main() function.

The result is stored in the internal cache variable specified by
<resultVar>. Success of build and run is indicated by boolean
true. Failure to build or run is indicated by boolean false
such as an empty string or an error message.

See also check_source_runs() for a more general command syntax.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_c_source_runs():

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckCXXCompilerFlag
Check once whether the CXX compiler supports a given flag.

check_cxx_compiler_flag

check_cxx_compiler_flag(<flag> <var>)

true indicates only that the compiler did not issue a diagnostic
message when given the flag. Whether the flag has any effect is beyond
the scope of this module.

See also check_compiler_flag() for a more general command syntax.

The compile and link commands can be influenced by setting any of the
following variables prior to calling check_cxx_compiler_flag(). Unknown
flags in these variables can case a false negative result.

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckCXXSourceCompiles
Check once if C++ source code can be built.

check_cxx_source_compiles

check_cxx_source_compiles(<code> <resultVar>
[FAIL_REGEX <regex1> [<regex2>...]])

Check once that the source supplied in <code> can be built. The
result is stored in the internal cache variable specified by
<resultVar>, with boolean true for success and boolean false for
failure.

If FAIL_REGEX is provided, then failure is determined by
checking if anything in the compiler output matches any of the
specified regular expressions.

See also check_source_compiles() for a more general command
syntax.

See also check_source_runs() to run compiled source.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_cxx_source_compiles():

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckCXXSourceRuns
Check once if given C++ source compiles and links into an executable
and can subsequently be run.

check_cxx_source_runs

check_cxx_source_runs(<code> <resultVar>)

Check once that the source supplied in <code> can be built,
linked as an executable, and then run. The <code> must contain
at least a main() function.

See also check_source_runs() for a more general command syntax.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_cxx_source_runs():

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckCXXSymbolExists
Check if a symbol exists as a function, variable, or macro in C++.

check_cxx_symbol_exists

check_cxx_symbol_exists(<symbol> <files> <variable>)

Check that the <symbol> is available after including given
header <files> and store the result in a <variable>. Specify
the list of files in one argument as a semicolon-separated list.
check_cxx_symbol_exists() can be used to check for symbols as
seen by the C++ compiler, as opposed to check_symbol_exists(),
which always uses the C compiler.

If the header files define the symbol as a macro it is
considered available and assumed to work. If the header files
declare the symbol as a function or variable then the symbol
must also be available for linking. If the symbol is a type,
enum value, or C++ template it will not be recognized: consider
using the CheckTypeSize or CheckSourceCompiles module instead.

NOTE:
This command is unreliable when <symbol> is (potentially) an
overloaded function. Since there is no reliable way to predict
whether a given function in the system environment may be defined as
an overloaded function or may be an overloaded function on other
systems or will become so in the future, it is generally advised to
use the CheckSourceCompiles module for checking any function symbol
(unless somehow you surely know the checked function is not
overloaded on other systems or will not be so in the future).

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

For example:

include(CheckCXXSymbolExists)

# Check for macro SEEK_SET
check_cxx_symbol_exists(SEEK_SET "cstdio" HAVE_SEEK_SET)
# Check for function std::fopen
check_cxx_symbol_exists(std::fopen "cstdio" HAVE_STD_FOPEN)

CheckFortranCompilerFlag
Added in version 3.3.

Check once whether the Fortran compiler supports a given flag.

check_fortran_compiler_flag

check_fortran_compiler_flag(<flag> <resultVar>)

true indicates only that the compiler did not issue a diagnostic
message when given the flag. Whether the flag has any effect is beyond
the scope of this module.

See also check_compiler_flag() for a more general command syntax.

The compile and link commands can be influenced by setting any of the
following variables prior to calling check_fortran_compiler_flag().
Unknown flags in these variables can case a false negative result.

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckFortranFunctionExists
Check if a Fortran function exists.

CHECK_FORTRAN_FUNCTION_EXISTS

CHECK_FORTRAN_FUNCTION_EXISTS(<function> <result>)

where

<function>
the name of the Fortran function

<result>
variable to store the result; will be created as an
internal cache variable.

NOTE:
This command does not detect functions in Fortran modules. In
general it is recommended to use CheckSourceCompiles instead to
determine if a Fortran function or subroutine is available.

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CheckFortranSourceCompiles
Added in version 3.1.

Check once if Fortran source code can be built.

check_fortran_source_compiles

check_fortran_source_compiles(<code> <resultVar>
[FAIL_REGEX <regex>...]
[SRC_EXT <extension>]
)

Check once that the source supplied in <code> can be built. The
result is stored in the internal cache variable specified by
<resultVar>, with boolean true for success and boolean false for
failure.

If FAIL_REGEX is provided, then failure is determined by
checking if anything in the compiler output matches any of the
specified regular expressions.

By default, the test source file will be given a .F file
extension. The SRC_EXT option can be used to override this with
.<extension> instead-- .F90 is a typical choice.

See also check_source_compiles() for a more general command
syntax.

See also check_source_runs() to run compiled source.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_fortran_source_compiles():

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckFortranSourceRuns
Added in version 3.14.

Check once if given Fortran source compiles and links into an
executable and can subsequently be run.

check_fortran_source_runs

check_fortran_source_runs(<code> <resultVar>
[SRC_EXT <extension>])

Check once that the source supplied in <code> can be built,
linked as an executable, and then run. The <code> must contain a
Fortran program.

check_fortran_source_runs("program test
real :: x[*]
call co_sum(x)
end program"
HAVE_COARRAY)

By default, the test source file will be given a .F90 file
extension. The SRC_EXT option can be used to override this with
.<extension> instead.

See also check_source_runs() for a more general command syntax.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_fortran_source_runs():

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckFunctionExists
Check once if a C function can be linked from system libraries.

check_function_exists

check_function_exists(<function> <variable>)

Checks that the <function> is provided by libraries on the
system and store the result in internal cache variable
<variable>.

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

NOTE:
Prefer using CheckSymbolExists or CheckSourceCompiles instead of
this module, for the following reasons:

o check_function_exists() can't detect functions that are inlined in
headers or specified as a macro.

o check_function_exists() can't detect anything in the 32-bit
versions of the Win32 API, because of a mismatch in calling
conventions.

o check_function_exists() only verifies linking, it does not verify
that the function is declared in system headers.

CheckIncludeFileCXX
Provides a macro to check if a header file can be included in CXX.

CHECK_INCLUDE_FILE_CXX

CHECK_INCLUDE_FILE_CXX(<include> <variable> [<flags>])

Check if the given <include> file may be included in a CXX
source file and store the result in an internal cache entry
named <variable>. The optional third argument may be used to
add compilation flags to the check (or use CMAKE_REQUIRED_FLAGS
below).

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

See modules CheckIncludeFile and CheckIncludeFiles to check for one or
more C headers.

CheckIncludeFile
Provides a macro to check if a header file can be included in C.

CHECK_INCLUDE_FILE

CHECK_INCLUDE_FILE(<include> <variable> [<flags>])

Check if the given <include> file may be included in a C source
file and store the result in an internal cache entry named
<variable>. The optional third argument may be used to add
compilation flags to the check (or use CMAKE_REQUIRED_FLAGS
below).

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

See the CheckIncludeFiles module to check for multiple headers at once.
See the CheckIncludeFileCXX module to check for headers using the CXX
language.

CheckIncludeFiles
Provides a macro to check if a list of one or more header files can be
included together.

CHECK_INCLUDE_FILES

CHECK_INCLUDE_FILES("<includes>" <variable> [LANGUAGE <language>])

Check if the given <includes> list may be included together in a
source file and store the result in an internal cache entry
named <variable>. Specify the <includes> argument as a ;-list
of header file names.

If LANGUAGE is set, the specified compiler will be used to
perform the check. Acceptable values are C and CXX. If not set,
the C compiler will be used if enabled. If the C compiler is not
enabled, the C++ compiler will be used if enabled.

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

See modules CheckIncludeFile and CheckIncludeFileCXX to check for a
single header file in C or CXX languages.

CheckIPOSupported
Added in version 3.9.

Check whether the compiler supports an interprocedural optimization
(IPO/LTO). Use this before enabling the INTERPROCEDURAL_OPTIMIZATION
target property.

check_ipo_supported

check_ipo_supported([RESULT <result>] [OUTPUT <output>]
[LANGUAGES <lang>...])

Options are:

RESULT <result>
Set <result> variable to YES if IPO is supported by the
compiler and NO otherwise. If this option is not given
then the command will issue a fatal error if IPO is not
supported.

OUTPUT <output>
Set <output> variable with details about any error.

LANGUAGES <lang>...
Specify languages whose compilers to check. Languages C,
CXX, and Fortran are supported.

It makes no sense to use this module when CMP0069 is set to OLD so
module will return error in this case. See policy CMP0069 for details.

Added in version 3.13: Add support for Visual Studio generators.

Added in version 3.24: The check uses the caller's CMAKE_<LANG>_FLAGS
and CMAKE_<LANG>_FLAGS_<CONFIG> values. See policy CMP0138.

Examples

check_ipo_supported() # fatal error if IPO is not supported
set_property(TARGET foo PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)

# Optional IPO. Do not use IPO if it's not supported by compiler.
check_ipo_supported(RESULT result OUTPUT output)
if(result)
set_property(TARGET foo PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
else()
message(WARNING "IPO is not supported: ${output}")
endif()

CheckLanguage
Check whether a language can be enabled by the enable_language() or
project() commands:

check_language

check_language(<lang>)

Try enabling language <lang> in a test project and record
results in the cache:

CMAKE_<LANG>_COMPILER
If the language can be enabled, this variable is set to
the compiler that was found. If the language cannot be
enabled, this variable is set to NOTFOUND.

If this variable is already set, either explicitly or
cached by a previous call, the check is skipped.

CMAKE_<LANG>_HOST_COMPILER
This variable is set when <lang> is CUDA or HIP.

If the check detects an explicit host compiler that is
required for compilation, this variable will be set to
that compiler. If the check detects that no explicit
host compiler is needed, this variable will be cleared.

If this variable is already set, its value is preserved
only if CMAKE_<LANG>_COMPILER is also set. Otherwise,
the check runs and overwrites CMAKE_<LANG>_HOST_COMPILER
with a new result. Note that CMAKE_<LANG>_HOST_COMPILER
documents it should not be set without also setting
CMAKE_<LANG>_COMPILER to a NVCC compiler.

CMAKE_<LANG>_PLATFORM
This variable is set to the detected GPU platform when
<lang> is HIP.

If the variable is already set its value is always
preserved. Only compatible values will be considered for
CMAKE_<LANG>_COMPILER.

For example:

check_language(Fortran)
if(CMAKE_Fortran_COMPILER)
enable_language(Fortran)
else()
message(STATUS "No Fortran support")
endif()

CheckLibraryExists
Check once if the function exists in system or specified library.

CHECK_LIBRARY_EXISTS

CHECK_LIBRARY_EXISTS(LIBRARY FUNCTION LOCATION VARIABLE)

LIBRARY - the name of the library you are looking for
FUNCTION - the name of the function
LOCATION - location where the library should be found
VARIABLE - internal cache variable to store the result

Prefer using CheckSymbolExists or CheckSourceCompiles instead of this
module for more robust detection if a function is available in a
library.

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckLinkerFlag
Added in version 3.18.

Check whether the compiler supports a given link flag.

check_linker_flag

check_linker_flag(<lang> <flag> <var>)

Check that the link <flag> is accepted by the <lang> compiler without a
diagnostic. Stores the result in an internal cache entry named <var>.

This command temporarily sets the CMAKE_REQUIRED_LINK_OPTIONS variable
and calls the check_source_compiles() command from the
CheckSourceCompiles module. See that module's documentation for a
listing of variables that can otherwise modify the build.

The underlying implementation relies on the LINK_OPTIONS property to
check the specified flag. The LINKER: prefix, as described in the
target_link_options() command, can be used as well.

A positive result from this check indicates only that the compiler did
not issue a diagnostic message when given the link flag. Whether the
flag has any effect or even a specific one is beyond the scope of this
module.

NOTE:
Since the try_compile() command forwards flags from variables like
CMAKE_<LANG>_FLAGS, unknown flags in such variables may cause a
false negative for this check.

CheckOBJCCompilerFlag
Added in version 3.16.

Check once whether the Objective-C compiler supports a given flag.

check_objc_compiler_flag

check_objc_compiler_flag(<flag> <resultVar>)

true indicates only that the compiler did not issue a diagnostic
message when given the flag. Whether the flag has any effect is beyond
the scope of this module.

See also check_compiler_flag() for a more general command syntax.

The compile and link commands can be influenced by setting any of the
following variables prior to calling check_objc_compiler_flag().
Unknown flags in these variables can case a false negative result.

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckOBJCSourceCompiles
Added in version 3.16.

Check once if Objective-C source can be built.

check_objc_source_compiles

check_objc_source_compiles(<code> <resultVar>
[FAIL_REGEX <regex1> [<regex2>...]])

Check once that the source supplied in <code> can be built. The
result is stored in the internal cache variable specified by
<resultVar>, with boolean true for success and boolean false for
failure.

If FAIL_REGEX is provided, then failure is determined by
checking if anything in the compiler output matches any of the
specified regular expressions.

See also check_source_compiles() for a more general command
syntax.

See also check_source_runs() to run compiled source.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_objc_source_compiles()

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckOBJCSourceRuns
Added in version 3.16.

Check once if given Objective-C source compiles and links into an
executable and can subsequently be run.

check_objc_source_runs

check_objc_source_runs(<code> <resultVar>)

Check once that the source supplied in <code> can be built,
linked as an executable, and then run. The <code> must contain
at least a main() function.

See also check_source_runs() for a more general command syntax.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_objc_source_runs()

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckOBJCXXCompilerFlag
Added in version 3.16.

Check once whether the Objective-C++ compiler supports a given flag.

check_objcxx_compiler_flag

check_objcxx_compiler_flag(<flag> <resultVar>)

true indicates only that the compiler did not issue a diagnostic
message when given the flag. Whether the flag has any effect is beyond
the scope of this module.

See also check_compiler_flag() for a more general command syntax.

The compile and link commands can be influenced by setting any of the
following variables prior to calling check_objcxx_compiler_flag().
Unknown flags in these variables can case a false negative result.

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckOBJCXXSourceCompiles
Added in version 3.16.

Check once if Objective-C++ source can be built.

check_objcxx_source_compiles

check_objcxx_source_compiles(<code> <resultVar>
[FAIL_REGEX <regex1> [<regex2>...]])

Check once that the source supplied in <code> can be built. The
result is stored in the internal cache variable specified by
<resultVar>, with boolean true for success and boolean false for
failure.

If FAIL_REGEX is provided, then failure is determined by
checking if anything in the compiler output matches any of the
specified regular expressions.

See also check_source_compiles() for a more general command
syntax.

See also check_source_runs() to run compiled source.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_objcxx_source_compiles()

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckOBJCXXSourceRuns
Added in version 3.16.

Check once if given Objective-C++ source compiles and links into an
executable and can subsequently be run.

check_objcxx_source_runs

check_objcxx_source_runs(<code> <resultVar>)

Check once that the source supplied in <code> can be built,
linked as an executable, and then run. The <code> must contain
at least a main() function.

See also check_source_runs() for a more general command syntax.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_objcxx_source_runs()

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckPIESupported
Added in version 3.14.

Check whether the linker supports Position Independent Code (PIE) or No
Position Independent Code (NO_PIE) for executables. Use this to ensure
that the POSITION_INDEPENDENT_CODE target property for executables will
be honored at link time.

check_pie_supported

check_pie_supported([OUTPUT_VARIABLE <output>]
[LANGUAGES <lang>...])

Options are:

OUTPUT_VARIABLE <output>
Set <output> variable with details about any error. If
the check is bypassed because it uses cached results from
a previous call, the output will be empty even if errors
were present in the previous call.

LANGUAGES <lang>...
Check the linkers used for each of the specified
languages. If this option is not provided, the command
checks all enabled languages.

C, CXX, Fortran are supported.

Added in version 3.23: OBJC, OBJCXX, CUDA, and HIP are
supported.

It makes no sense to use this module when CMP0083 is set to OLD, so the
command will return an error in this case. See policy CMP0083 for
details.

Variables
For each language checked, two boolean cache variables are defined.

CMAKE_<lang>_LINK_PIE_SUPPORTED
Set to true if PIE is supported by the linker and false
otherwise.

CMAKE_<lang>_LINK_NO_PIE_SUPPORTED
Set to true if NO_PIE is supported by the linker and false
otherwise.

Examples

check_pie_supported()
set_property(TARGET foo PROPERTY POSITION_INDEPENDENT_CODE TRUE)

# Retrieve any error message.
check_pie_supported(OUTPUT_VARIABLE output LANGUAGES C)
set_property(TARGET foo PROPERTY POSITION_INDEPENDENT_CODE TRUE)
if(NOT CMAKE_C_LINK_PIE_SUPPORTED)
message(WARNING "PIE is not supported at link time: ${output}.\n"
"PIE link options will not be passed to linker.")
endif()

CheckPrototypeDefinition
Check if the prototype we expect is correct.

check_prototype_definition

check_prototype_definition(FUNCTION PROTOTYPE RETURN HEADER VARIABLE)

FUNCTION - The name of the function (used to check if prototype exists)
PROTOTYPE- The prototype to check.
RETURN - The return value of the function.
HEADER - The header files required.
VARIABLE - The variable to store the result.
Will be created as an internal cache variable.

Example:

check_prototype_definition(getpwent_r
"struct passwd *getpwent_r(struct passwd *src, char *buf, int buflen)"
"NULL"
"unistd.h;pwd.h"
SOLARIS_GETPWENT_R)

The following variables may be set before calling this function to
modify the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckSourceCompiles
Added in version 3.19.

Check once if source code can be built for a given language.

check_source_compiles

check_source_compiles(<lang> <code> <resultVar>
[FAIL_REGEX <regex1> [<regex2>...]]
[SRC_EXT <extension>])

Check once that the source supplied in <code> can be built for
code language <lang>. The result is stored in the internal cache
variable specified by <resultVar>, with boolean true for success
and boolean false for failure.

If FAIL_REGEX is provided, then failure is determined by
checking if anything in the compiler output matches any of the
specified regular expressions.

By default, the test source file will be given a file extension
that matches the requested language. The SRC_EXT option can be
used to override this with .<extension> instead.

The C example checks if the compiler supports the noreturn
attribute:

set(CMAKE_TRY_COMPILE_TARGET_TYPE "STATIC_LIBRARY")

check_source_compiles(C
"#if !__has_c_attribute(noreturn)
#error \"No noreturn attribute\"
#endif"
HAVE_NORETURN)

The Fortran example checks if the compiler supports the pure
procedure attribute:

set(CMAKE_TRY_COMPILE_TARGET_TYPE "STATIC_LIBRARY")

check_source_compiles(Fortran
"pure subroutine foo()
end subroutine"
HAVE_PURE)

See also check_source_runs() to run compiled source.

The compile and link commands can be influenced by setting any
of the following variables prior to calling
check_source_compiles():

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckSourceRuns
Added in version 3.19.

Check if given source compiles and links into an executable and can
subsequently be run.

check_source_runs

check_source_runs(<lang> <code> <resultVar>
[SRC_EXT <extension>])

Check once that the <lang> source supplied in <code> can be
built, linked as an executable, and then run. The <code> must
contain at least a main() function, or in Fortran a program.

By default, the test source file will be given a file extension
that matches the requested language. The SRC_EXT option can be
used to override this with .<extension> instead.

The <code> must contain a valid main program. For example:

check_source_runs(C
"#include <stdlib.h>
#include <stdnoreturn.h>
noreturn void f(){ exit(0); }
int main(void) { f(); return 1; }"
HAVE_NORETURN)

check_source_runs(Fortran
"program test
real :: x[*]
call co_sum(x)
end program"
HAVE_COARRAY)

The compile and link commands can be influenced by setting any
of the following variables prior to calling check_source_runs()

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CheckStructHasMember
Check if the given struct or class has the specified member variable

CHECK_STRUCT_HAS_MEMBER

CHECK_STRUCT_HAS_MEMBER(<struct> <member> <header> <variable>
[LANGUAGE <language>])

<struct> - the name of the struct or class you are interested in
<member> - the member which existence you want to check
<header> - the header(s) where the prototype should be declared
<variable> - variable to store the result
<language> - the compiler to use (C or CXX)

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

Example:

CHECK_STRUCT_HAS_MEMBER("struct timeval" tv_sec sys/select.h
HAVE_TIMEVAL_TV_SEC LANGUAGE C)

CheckSymbolExists
Provides a macro to check if a symbol exists as a function, variable,
or macro in C.

check_symbol_exists

check_symbol_exists(<symbol> <files> <variable>)

Check that the <symbol> is available after including given
header <files> and store the result in a <variable>. Specify
the list of files in one argument as a semicolon-separated list.
<variable> will be created as an internal cache variable.

If the header files define the symbol as a macro it is considered
available and assumed to work. If the header files declare the symbol
as a function or variable then the symbol must also be available for
linking (so intrinsics may not be detected). If the symbol is a type,
enum value, or intrinsic it will not be recognized (consider using
CheckTypeSize or CheckSourceCompiles). If the check needs to be done
in C++, consider using CheckCXXSymbolExists instead.

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

For example:

include(CheckSymbolExists)

# Check for macro SEEK_SET
check_symbol_exists(SEEK_SET "stdio.h" HAVE_SEEK_SET)
# Check for function fopen
check_symbol_exists(fopen "stdio.h" HAVE_FOPEN)

CheckTypeSize
Check sizeof a type

check_type_size

check_type_size(<type> <variable> [BUILTIN_TYPES_ONLY]
[LANGUAGE <language>])

Check if the type exists and determine its size. Results are
reported in the following variables:

HAVE_<variable>
Holds a true or false value indicating whether the type
exists.

<variable>
Holds one of the following values:

<size> Type has non-zero size <size>.

0 Type has architecture-dependent size. This may
occur when CMAKE_OSX_ARCHITECTURES has multiple
architectures. In this case <variable>_CODE
contains C preprocessor tests mapping from each
architecture macro to the corresponding type size.
The list of architecture macros is stored in
<variable>_KEYS, and the value for each key is
stored in <variable>-<key>.

"" (empty string)
Type does not exist.

<variable>_CODE
Holds C preprocessor code to define the macro <variable>
to the size of the type, or to leave the macro undefined
if the type does not exist.

The options are:

BUILTIN_TYPES_ONLY
Support only compiler-builtin types. If not given, the macro
checks for headers <sys/types.h>, <stdint.h>, and <stddef.h>,
and saves results in HAVE_SYS_TYPES_H, HAVE_STDINT_H, and
HAVE_STDDEF_H. The type size check automatically includes
the available headers, thus supporting checks of types
defined in the headers.

LANGUAGE <language>
Use the <language> compiler to perform the check.
Acceptable values are C and CXX.

Despite the name of the macro you may use it to check the size of more
complex expressions, too. To check e.g. for the size of a struct
member you can do something like this:

check_type_size("((struct something*)0)->member" SIZEOF_MEMBER)

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_LINK_DIRECTORIES
Added in version 3.31.

A ;-list of libraries search paths to pass to the linker (see
try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CMAKE_EXTRA_INCLUDE_FILES
list of extra headers to include.

CheckVariableExists
Check if the variable exists.

CHECK_VARIABLE_EXISTS

CHECK_VARIABLE_EXISTS(VAR VARIABLE)

VAR - the name of the variable
VARIABLE - variable to store the result
Will be created as an internal cache variable.

This macro is only for C variables.

The following variables may be set before calling this macro to modify
the way the check is run:

CMAKE_REQUIRED_DEFINITIONS
A ;-list of compiler definitions of the form -DFOO or
-DFOO=bar. A definition for the name specified by <resultVar>
will also be added automatically.

CMAKE_REQUIRED_LINK_OPTIONS
Added in version 3.14.

A ;-list of options to add to the link command (see
try_compile() for further details).

CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can
be the name of system libraries or they can be Imported
Targets (see try_compile() for further details).

CMAKE_REQUIRED_QUIET
Added in version 3.1.

If this variable evaluates to a boolean true value, all
status messages associated with the check will be suppressed.

CMakeAddFortranSubdirectory
Add a fortran-only subdirectory, find a fortran compiler, and build.

The cmake_add_fortran_subdirectory function adds a subdirectory to a
project that contains a fortran-only subproject. The module will check
the current compiler and see if it can support fortran. If no fortran
compiler is found and the compiler is MSVC, then this module will find
the MinGW gfortran. It will then use an external project to build with
the MinGW tools. It will also create imported targets for the
libraries created. This will only work if the fortran code is built
into a dll, so BUILD_SHARED_LIBS is turned on in the project. In
addition the CMAKE_GNUtoMS option is set to on, so that Microsoft .lib
files are created. Usage is as follows:

cmake_add_fortran_subdirectory(
<subdir> # name of subdirectory
PROJECT <project_name> # project name in subdir top CMakeLists.txt
ARCHIVE_DIR <dir> # dir where project places .lib files
RUNTIME_DIR <dir> # dir where project places .dll files
LIBRARIES <lib>... # names of library targets to import
LINK_LIBRARIES # link interface libraries for LIBRARIES
[LINK_LIBS <lib> <dep>...]...
CMAKE_COMMAND_LINE ... # extra command line flags to pass to cmake
NO_EXTERNAL_INSTALL # skip installation of external project
)

Relative paths in ARCHIVE_DIR and RUNTIME_DIR are interpreted with
respect to the build directory corresponding to the source directory in
which the function is invoked.

Limitations:

NO_EXTERNAL_INSTALL is required for forward compatibility with a future
version that supports installation of the external project binaries
during make install.

CMakeBackwardCompatibilityCXX
define a bunch of backwards compatibility variables

CMAKE_ANSI_CXXFLAGS - flag for ansi c++
CMAKE_HAS_ANSI_STRING_STREAM - has <strstream>
include(TestForANSIStreamHeaders)
include(CheckIncludeFileCXX)
include(TestForSTDNamespace)
include(TestForANSIForScope)

CMakeDependentOption
Macro to provide an option dependent on other options.

This macro presents an option to the user only if a set of other
conditions are true.

cmake_dependent_option

cmake_dependent_option(<option> "<help_text>" <value> <depends> <force>)

Makes <option> available to the user if the semicolon-separated
list of conditions in <depends> are all true. Otherwise, a
local variable named <option> is set to <force>.

When <option> is available, the given <help_text> and initial
<value> are used. Otherwise, any value set by the user is
preserved for when <depends> is satisfied in the future.

Note that the <option> variable only has a value which satisfies
the <depends> condition within the scope of the caller because
it is a local variable.

Example invocation:

cmake_dependent_option(USE_FOO "Use Foo" ON "USE_BAR;NOT USE_ZOT" OFF)

If USE_BAR is true and USE_ZOT is false, this provides an option called
USE_FOO that defaults to ON. Otherwise, it sets USE_FOO to OFF and
hides the option from the user. If the status of USE_BAR or USE_ZOT
ever changes, any value for the USE_FOO option is saved so that when
the option is re-enabled it retains its old value.

Added in version 3.22: Full Condition Syntax is now supported. See
policy CMP0127.

CMakeFindDependencyMacro

find_dependency
The find_dependency() macro wraps a find_package() call for a
package dependency:

find_dependency(<dep> [...])

It is designed to be used in a Package Configuration File
(<PackageName>Config.cmake). find_dependency forwards the
correct parameters for QUIET and REQUIRED which were passed to
the original find_package() call. Any additional arguments
specified are forwarded to find_package().

If the dependency could not be found it sets an informative
diagnostic message and calls return() to end processing of the
calling package configuration file and return to the
find_package() command that loaded it.

NOTE:
The call to return() makes this macro unsuitable to call from
Find Modules.

Package Dependency Search Optimizations
If find_dependency is called with arguments identical to a previous
call in the same directory, perhaps due to diamond-shaped package
dependencies, the underlying call to find_package() is optimized out.
This optimization is important to support large package dependency
graphs while avoiding a combinatorial explosion of repeated searches.
However, the heuristic cannot account for ambient variables that affect
package behavior, such as <PackageName>_USE_STATIC_LIBS, offered by
some packages. Therefore package configuration files should avoid
setting such variables before their calls to find_dependency.

Changed in version 3.15: Previously, the underlying call to
find_package() was always optimized out if the package had already been
found. CMake 3.15 removed the optimization to support cases in which
find_dependency call arguments request different components.

Changed in version 3.26: The pre-3.15 optimization was restored, but
with the above-described heuristic to account for varying
find_dependency call arguments.

CMakeFindPackageMode
This file is executed by cmake when invoked with --find-package. It
expects that the following variables are set using -D:

NAME name of the package

COMPILER_ID
the CMake compiler ID for which the result is, i.e.
GNU/Intel/Clang/MSVC, etc.

LANGUAGE
language for which the result will be used, i.e.
C/CXX/Fortran/ASM

MODE

EXIST only check for existence of the given package

COMPILE
print the flags needed for compiling an object file which
uses the given package

LINK print the flags needed for linking when using the given
package

QUIET if TRUE, don't print anything

CMakeGraphVizOptions
The builtin Graphviz support of CMake.

Generating Graphviz files
CMake can generate Graphviz files showing the dependencies between the
targets in a project, as well as external libraries which are linked
against.

When running CMake with the --graphviz=foo.dot option, it produces:

o a foo.dot file, showing all dependencies in the project

o a foo.dot.<target> file for each target, showing on which other
targets it depends

o a foo.dot.<target>.dependers file for each target, showing which
other targets depend on it

Those .dot files can be converted to images using the dot command from
the Graphviz package:

dot -Tpng -o foo.png foo.dot

Added in version 3.10: The different dependency types PUBLIC, INTERFACE
and PRIVATE are represented as solid, dashed and dotted edges.

Variables specific to the Graphviz support
The resulting graphs can be huge. The look and content of the
generated graphs can be controlled using the file
CMakeGraphVizOptions.cmake. This file is first searched in
CMAKE_BINARY_DIR, and then in CMAKE_SOURCE_DIR. If found, the
variables set in it are used to adjust options for the generated
Graphviz files.

GRAPHVIZ_GRAPH_NAME
The graph name.

o Mandatory: NO

o Default: value of CMAKE_PROJECT_NAME

GRAPHVIZ_GRAPH_HEADER
The header written at the top of the Graphviz files.

o Mandatory: NO

o Default: "node [ fontsize = "12" ];"

GRAPHVIZ_NODE_PREFIX
The prefix for each node in the Graphviz files.

o Mandatory: NO

o Default: "node"

GRAPHVIZ_EXECUTABLES
Set to FALSE to exclude executables from the generated graphs.

o Mandatory: NO

o Default: TRUE

GRAPHVIZ_STATIC_LIBS
Set to FALSE to exclude static libraries from the generated
graphs.

o Mandatory: NO

o Default: TRUE

GRAPHVIZ_SHARED_LIBS
Set to FALSE to exclude shared libraries from the generated
graphs.

o Mandatory: NO

o Default: TRUE

GRAPHVIZ_MODULE_LIBS
Set to FALSE to exclude module libraries from the generated
graphs.

o Mandatory: NO

o Default: TRUE

GRAPHVIZ_INTERFACE_LIBS
Set to FALSE to exclude interface libraries from the generated
graphs.

o Mandatory: NO

o Default: TRUE

GRAPHVIZ_OBJECT_LIBS
Set to FALSE to exclude object libraries from the generated
graphs.

o Mandatory: NO

o Default: TRUE

GRAPHVIZ_UNKNOWN_LIBS
Set to FALSE to exclude unknown libraries from the generated
graphs.

o Mandatory: NO

o Default: TRUE

GRAPHVIZ_EXTERNAL_LIBS
Set to FALSE to exclude external libraries from the generated
graphs.

o Mandatory: NO

o Default: TRUE

GRAPHVIZ_CUSTOM_TARGETS
Set to TRUE to include custom targets in the generated graphs.

o Mandatory: NO

o Default: FALSE

GRAPHVIZ_IGNORE_TARGETS
A list of regular expressions for names of targets to exclude
from the generated graphs.

o Mandatory: NO

o Default: empty

GRAPHVIZ_GENERATE_PER_TARGET
Set to FALSE to not generate per-target graphs foo.dot.<target>.

o Mandatory: NO

o Default: TRUE

GRAPHVIZ_GENERATE_DEPENDERS
Set to FALSE to not generate depender graphs
foo.dot.<target>.dependers.

o Mandatory: NO

o Default: TRUE

CMakePackageConfigHelpers
Helper functions for creating config files that can be included by
other projects to find and use a package.

Generating a Package Configuration File

configure_package_config_file
Create a config file for a project:

configure_package_config_file(<input> <output>
INSTALL_DESTINATION <path>
[PATH_VARS <var1> <var2> ... <varN>]
[NO_SET_AND_CHECK_MACRO]
[NO_CHECK_REQUIRED_COMPONENTS_MACRO]
[INSTALL_PREFIX <path>]
)

configure_package_config_file() should be used instead of the plain
configure_file() command when creating the <PackageName>Config.cmake or
<PackageName>-config.cmake file for installing a project or library.
It helps make the resulting package relocatable by avoiding hardcoded
paths in the installed <PackageName>Config.cmake file.

In a FooConfig.cmake file there may be code like this to make the
install destinations known to the using project:

set(FOO_INCLUDE_DIR "@CMAKE_INSTALL_FULL_INCLUDEDIR@" )
set(FOO_DATA_DIR "@CMAKE_INSTALL_PREFIX@/@RELATIVE_DATA_INSTALL_DIR@" )
set(FOO_ICONS_DIR "@CMAKE_INSTALL_PREFIX@/share/icons" )
#...logic to determine installedPrefix from the own location...
set(FOO_CONFIG_DIR "${installedPrefix}/@CONFIG_INSTALL_DIR@" )

All four options shown above are not sufficient The first three
hardcode the absolute directory locations. The fourth case works only
if the logic to determine the installedPrefix is correct, and if
CONFIG_INSTALL_DIR contains a relative path, which in general cannot be
guaranteed. This has the effect that the resulting FooConfig.cmake
file would work poorly under Windows and macOS, where users are used to
choosing the install location of a binary package at install time,
independent from how CMAKE_INSTALL_PREFIX was set at build/cmake time.

Using configure_package_config_file() helps. If used correctly, it
makes the resulting FooConfig.cmake file relocatable. Usage:

1. Write a FooConfig.cmake.in file as you are used to.

2. Insert a line at the top containing only the string @PACKAGE_INIT@.

3. Instead of set(FOO_DIR "@SOME_INSTALL_DIR@"), use set(FOO_DIR
"@PACKAGE_SOME_INSTALL_DIR@") (this must be after the @PACKAGE_INIT@
line).

4. Instead of using the normal configure_file() command, use
configure_package_config_file().

The <input> and <output> arguments are the input and output file, the
same way as in configure_file().

The <path> given to INSTALL_DESTINATION must be the destination where
the FooConfig.cmake file will be installed to. This path can either be
absolute, or relative to the INSTALL_PREFIX path.

The variables <var1> to <varN> given as PATH_VARS are the variables
which contain install destinations. For each of them, the macro will
create a helper variable PACKAGE_<var...>. These helper variables must
be used in the FooConfig.cmake.in file for setting the installed
location. They are calculated by configure_package_config_file() so
that they are always relative to the installed location of the package.
This works both for relative and also for absolute locations. For
absolute locations, it works only if the absolute location is a
subdirectory of INSTALL_PREFIX.

Added in version 3.30: The variable PACKAGE_PREFIX_DIR will always be
defined after the @PACKAGE_INIT@ line. It will hold the value of the
base install location. In general, variables defined via the PATH_VARS
mechanism should be used instead, but PACKAGE_PREFIX_DIR can be used
for those cases not easily handled by PATH_VARS, such as for files
installed directly to the base install location rather than a
subdirectory of it.

NOTE:
When consumers of the generated file use CMake 3.29 or older, the
value of PACKAGE_PREFIX_DIR can be changed by a call to
find_dependency() or find_package(). If a project relies on
PACKAGE_PREFIX_DIR, it is the project's responsibility to ensure
that the value of PACKAGE_PREFIX_DIR is preserved across any such
calls, or any other calls which might include another file generated
by configure_package_config_file().

Added in version 3.1: If the INSTALL_PREFIX argument is passed, this is
used as the base path to calculate all the relative paths. The <path>
argument must be an absolute path. If this argument is not passed, the
CMAKE_INSTALL_PREFIX variable will be used instead. The default value
is good when generating a FooConfig.cmake file to use your package from
the install tree. When generating a FooConfig.cmake file to use your
package from the build tree, this option should be used.

By default, configure_package_config_file() also generates two helper
macros, set_and_check() and check_required_components(), into the
FooConfig.cmake file.

set_and_check() should be used instead of the normal set() command for
setting directories and file locations. In addition to setting the
variable, it also checks that the referenced file or directory actually
exists and fails with a fatal error if it doesn't. This ensures that
the generated FooConfig.cmake file does not contain wrong references.
Add the NO_SET_AND_CHECK_MACRO option to prevent the generation of the
set_and_check() macro in the FooConfig.cmake file.

check_required_components(<PackageName>) should be called at the end of
the FooConfig.cmake file. This macro checks whether all requested,
non-optional components have been found, and if this is not the case,
it sets the Foo_FOUND variable to FALSE so that the package is
considered to be not found. It does that by testing the
Foo_<Component>_FOUND variables for all requested required components.
This macro should be called even if the package doesn't provide any
components to make sure users are not specifying components
erroneously. Add the NO_CHECK_REQUIRED_COMPONENTS_MACRO option to
prevent the generation of the check_required_components() macro in the
FooConfig.cmake file.

See also Example Generating Package Files.

Generating a Package Version File

write_basic_package_version_file
Create a version file for a project:

write_basic_package_version_file(<filename>
[VERSION <major.minor.patch>]
COMPATIBILITY <AnyNewerVersion|SameMajorVersion|SameMinorVersion|ExactVersion>
[ARCH_INDEPENDENT] )

Writes a file for use as a <PackageName>ConfigVersion.cmake file to
<filename>. See the documentation of find_package() for details on
such files.

<filename> is the output filename, which should be in the build tree.
<major.minor.patch> is the version number of the project to be
installed.

If no VERSION is given, the PROJECT_VERSION variable is used. If this
hasn't been set, it errors out.

The COMPATIBILITY mode AnyNewerVersion means that the installed package
version will be considered compatible if it is newer or exactly the
same as the requested version. This mode should be used for packages
which are fully backward compatible, also across major versions. If
SameMajorVersion is used instead, then the behavior differs from
AnyNewerVersion in that the major version number must be the same as
requested, e.g. version 2.0 will not be considered compatible if 1.0
is requested. This mode should be used for packages which guarantee
backward compatibility within the same major version. If
SameMinorVersion is used, the behavior is the same as SameMajorVersion,
but both major and minor version must be the same as requested, e.g
version 0.2 will not be compatible if 0.1 is requested. If
ExactVersion is used, then the package is only considered compatible if
the requested version matches exactly its own version number (not
considering the tweak version). For example, version 1.2.3 of a
package is only considered compatible to requested version 1.2.3. This
mode is for packages without compatibility guarantees. If your project
has more elaborate version matching rules, you will need to write your
own custom <PackageName>ConfigVersion.cmake file instead of using this
macro.

Added in version 3.11: The SameMinorVersion compatibility mode.

Added in version 3.14: If ARCH_INDEPENDENT is given, the installed
package version will be considered compatible even if it was built for
a different architecture than the requested architecture. Otherwise,
an architecture check will be performed, and the package will be
considered compatible only if the architecture matches exactly. For
example, if the package is built for a 32-bit architecture, the package
is only considered compatible if it is used on a 32-bit architecture,
unless ARCH_INDEPENDENT is given, in which case the package is
considered compatible on any architecture.

NOTE:
ARCH_INDEPENDENT is intended for header-only libraries or similar
packages with no binaries.

Added in version 3.19: The version file generated by AnyNewerVersion,
SameMajorVersion and SameMinorVersion arguments of COMPATIBILITY handle
the version range, if one is specified (see find_package() command for
the details). ExactVersion mode is incompatible with version ranges
and will display an author warning if one is specified.

Internally, this macro executes configure_file() to create the
resulting version file. Depending on the COMPATIBILITY, the
corresponding BasicConfigVersion-<COMPATIBILITY>.cmake.in file is used.
Please note that these files are internal to CMake and you should not
call configure_file() on them yourself, but they can be used as a
starting point to create more sophisticated custom
<PackageName>ConfigVersion.cmake files.

Generating an Apple Platform Selection File

generate_apple_platform_selection_file
Added in version 3.29.

Create an Apple platform selection file:

generate_apple_platform_selection_file(<filename>
INSTALL_DESTINATION <path>
[INSTALL_PREFIX <path>]
[MACOS_INCLUDE_FILE <file>]
[IOS_INCLUDE_FILE <file>]
[IOS_SIMULATOR_INCLUDE_FILE <file>]
[IOS_CATALYST_INCLUDE_FILE <file>]
[TVOS_INCLUDE_FILE <file>]
[TVOS_SIMULATOR_INCLUDE_FILE <file>]
[WATCHOS_INCLUDE_FILE <file>]
[WATCHOS_SIMULATOR_INCLUDE_FILE <file>]
[VISIONOS_INCLUDE_FILE <file>]
[VISIONOS_SIMULATOR_INCLUDE_FILE <file>]
[ERROR_VARIABLE <variable>]
)

Write a file that includes an Apple-platform-specific .cmake
file, e.g., for use as <PackageName>Config.cmake. This can be
used in conjunction with the XCFRAMEWORK_LOCATION argument of
export(SETUP) to export packages in a way that a project built
for any Apple platform can use them.

INSTALL_DESTINATION <path>
Path to which the generated file will be installed by the
caller, e.g., via install(FILES). The path may be either
relative to the INSTALL_PREFIX or absolute.

INSTALL_PREFIX <path>
Path prefix to which the package will be installed by the
caller. The <path> argument must be an absolute path.
If this argument is not passed, the CMAKE_INSTALL_PREFIX
variable will be used instead.

MACOS_INCLUDE_FILE <file>
File to include if the platform is macOS.

IOS_INCLUDE_FILE <file>
File to include if the platform is iOS.

IOS_SIMULATOR_INCLUDE_FILE <file>
File to include if the platform is iOS Simulator.

IOS_CATALYST_INCLUDE_FILE <file>
Added in version 3.31.

File to include if the platform is iOS Catalyst.

TVOS_INCLUDE_FILE <file>
File to include if the platform is tvOS.

TVOS_SIMULATOR_INCLUDE_FILE <file>
File to include if the platform is tvOS Simulator.

WATCHOS_INCLUDE_FILE <file>
File to include if the platform is watchOS.

WATCHOS_SIMULATOR_INCLUDE_FILE <file>
File to include if the platform is watchOS Simulator.

VISIONOS_INCLUDE_FILE <file>
File to include if the platform is visionOS.

VISIONOS_SIMULATOR_INCLUDE_FILE <file>
File to include if the platform is visionOS Simulator.

ERROR_VARIABLE <variable>
If the consuming project is built for an unsupported
platform, set <variable> to an error message. The
includer may use this information to pretend the package
was not found. If this option is not given, the default
behavior is to issue a fatal error.

If any of the optional include files is not specified, and the
consuming project is built for its corresponding platform, the
generated file will consider the platform to be unsupported.
The behavior is determined by the ERROR_VARIABLE option.

Generating an Apple Architecture Selection File

generate_apple_architecture_selection_file
Added in version 3.29.

Create an Apple architecture selection file:

generate_apple_architecture_selection_file(<filename>
INSTALL_DESTINATION <path>
[INSTALL_PREFIX <path>]
[SINGLE_ARCHITECTURES <arch>...
SINGLE_ARCHITECTURE_INCLUDE_FILES <file>...]
[UNIVERSAL_ARCHITECTURES <arch>...
UNIVERSAL_INCLUDE_FILE <file>]
[ERROR_VARIABLE <variable>]
)

Write a file that includes an Apple-architecture-specific .cmake
file based on CMAKE_OSX_ARCHITECTURES, e.g., for inclusion from
an Apple-specific <PackageName>Config.cmake file.

INSTALL_DESTINATION <path>
Path to which the generated file will be installed by the
caller, e.g., via install(FILES). The path may be either
relative to the INSTALL_PREFIX or absolute.

SINGLE_ARCHITECTURES <arch>...
Architectures provided by entries of
SINGLE_ARCHITECTURE_INCLUDE_FILES.

SINGLE_ARCHITECTURE_INCLUDE_FILES <file>...
Architecture-specific files. One of them will be loaded
when CMAKE_OSX_ARCHITECTURES contains a single
architecture matching the corresponding entry of
SINGLE_ARCHITECTURES.

UNIVERSAL_ARCHITECTURES <arch>...
Architectures provided by the UNIVERSAL_INCLUDE_FILE.

The list may include $(ARCHS_STANDARD) to support
consumption using the Xcode generator, but the
architectures should always be listed individually too.

UNIVERSAL_INCLUDE_FILE <file>
A file to load when CMAKE_OSX_ARCHITECTURES contains a
(non-strict) subset of the UNIVERSAL_ARCHITECTURES and
does not match any one of the SINGLE_ARCHITECTURES.

ERROR_VARIABLE <variable>
If the consuming project is built for an unsupported
architecture, set <variable> to an error message. The
includer may use this information to pretend the package
was not found. If this option is not given, the default
behavior is to issue a fatal error.

Example Generating Package Files
Example using both the configure_package_config_file() and
write_basic_package_version_file() commands:

CMakeLists.txt

include(GNUInstallDirs)
set(INCLUDE_INSTALL_DIR ${CMAKE_INSTALL_INCLUDEDIR}/Foo
CACHE PATH "Location of header files" )
set(SYSCONFIG_INSTALL_DIR ${CMAKE_INSTALL_SYSCONFDIR}/foo
CACHE PATH "Location of configuration files" )
#...
include(CMakePackageConfigHelpers)
configure_package_config_file(FooConfig.cmake.in
${CMAKE_CURRENT_BINARY_DIR}/FooConfig.cmake
INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Foo
PATH_VARS INCLUDE_INSTALL_DIR SYSCONFIG_INSTALL_DIR)
write_basic_package_version_file(
${CMAKE_CURRENT_BINARY_DIR}/FooConfigVersion.cmake
VERSION 1.2.3
COMPATIBILITY SameMajorVersion )
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/FooConfig.cmake
${CMAKE_CURRENT_BINARY_DIR}/FooConfigVersion.cmake
DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Foo )

FooConfig.cmake.in

set(FOO_VERSION x.y.z)
...
@PACKAGE_INIT@
...
set_and_check(FOO_INCLUDE_DIR "@PACKAGE_INCLUDE_INSTALL_DIR@")
set_and_check(FOO_SYSCONFIG_DIR "@PACKAGE_SYSCONFIG_INSTALL_DIR@")

check_required_components(Foo)

CMakePrintHelpers
Convenience functions for printing properties and variables, useful
e.g. for debugging.

cmake_print_properties(<TARGETS [<target1> ...] |
SOURCES [<source1> ...] |
DIRECTORIES [<dir1> ...] |
TESTS [<test1> ...] |
CACHE_ENTRIES [<entry1> ...] >
PROPERTIES [<prop1> ...] )

This function prints the values of the properties of the given targets,
source files, directories, tests or cache entries. Exactly one of the
scope keywords must be used. The scope keyword and its arguments must
come before the PROPERTIES keyword, in the arguments list.

Example:

cmake_print_properties(TARGETS foo bar PROPERTIES
LOCATION INTERFACE_INCLUDE_DIRECTORIES)

This will print the LOCATION and INTERFACE_INCLUDE_DIRECTORIES
properties for both targets foo and bar.

cmake_print_variables(var1 var2 .. varN)

This function will print the name of each variable followed by its
value. Example:

cmake_print_variables(CMAKE_C_COMPILER CMAKE_MAJOR_VERSION DOES_NOT_EXIST)

Gives:

-- CMAKE_C_COMPILER="/usr/bin/gcc" ; CMAKE_MAJOR_VERSION="2" ; DOES_NOT_EXIST=""

CMakePrintSystemInformation
Print system information.

This module serves diagnostic purposes. Just include it in a project to
see various internal CMake variables.

CMakePushCheckState
This module defines three macros: CMAKE_PUSH_CHECK_STATE()
CMAKE_POP_CHECK_STATE() and CMAKE_RESET_CHECK_STATE() These macros can
be used to save, restore and reset (i.e., clear contents) the state of
the variables CMAKE_REQUIRED_FLAGS, CMAKE_REQUIRED_DEFINITIONS,
CMAKE_REQUIRED_LINK_OPTIONS, CMAKE_REQUIRED_LIBRARIES,
CMAKE_REQUIRED_LINK_DIRECTORIES, CMAKE_REQUIRED_INCLUDES and
CMAKE_EXTRA_INCLUDE_FILES used by the various Check-files coming with
CMake, like e.g. check_function_exists() etc. The variable contents
are pushed on a stack, pushing multiple times is supported. This is
useful e.g. when executing such tests in a Find-module, where they
have to be set, but after the Find-module has been executed they should
have the same value as they had before.

CMAKE_PUSH_CHECK_STATE() macro receives optional argument RESET.
Whether it's specified, CMAKE_PUSH_CHECK_STATE() will set all
CMAKE_REQUIRED_* variables to empty values, same as
CMAKE_RESET_CHECK_STATE() call will do.

Usage:

cmake_push_check_state(RESET)
set(CMAKE_REQUIRED_DEFINITIONS -DSOME_MORE_DEF)
check_function_exists(...)
cmake_reset_check_state()
set(CMAKE_REQUIRED_DEFINITIONS -DANOTHER_DEF)
check_function_exists(...)
cmake_pop_check_state()

CMakeVerifyManifest
CMakeVerifyManifest.cmake

This script is used to verify that embedded manifests and side by side
manifests for a project match. To run this script, cd to a directory
and run the script with cmake -P. On the command line you can pass in
versions that are OK even if not found in the .manifest files. For
example, cmake -Dallow_versions=8.0.50608.0 -PCmakeVerifyManifest.cmake
could be used to allow an embedded manifest of 8.0.50608.0 to be used
in a project even if that version was not found in the .manifest file.

CPack
Configure generators for binary installers and source packages.

Introduction
The CPack module generates the configuration files CPackConfig.cmake
and CPackSourceConfig.cmake. They are intended for use in a subsequent
run of the cpack program where they steer the generation of installers
or/and source packages.

Depending on the CMake generator, the CPack module may also add two new
build targets, package and package_source. See the packaging targets
section below for details.

The generated binary installers will contain all files that have been
installed via CMake's install() command (and the deprecated commands
install_files(), install_programs(), and install_targets()). Note that
the DESTINATION option of the install() command must be a relative
path; otherwise installed files are ignored by CPack.

Certain kinds of binary installers can be configured such that users
can select individual application components to install. See the
CPackComponent module for further details.

Source packages (configured through CPackSourceConfig.cmake and
generated by the CPack Archive Generator) will contain all source files
in the project directory except those specified in
CPACK_SOURCE_IGNORE_FILES.

CPack Generators
The CPACK_GENERATOR variable has different meanings in different
contexts. In a CMakeLists.txt file, CPACK_GENERATOR is a list of
generators: and when cpack is run with no other arguments, it will
iterate over that list and produce one package for each generator. In
a CPACK_PROJECT_CONFIG_FILE, CPACK_GENERATOR is a string naming a
single generator. If you need per-cpack-generator logic to control
other cpack settings, then you need a CPACK_PROJECT_CONFIG_FILE. If
set, the CPACK_PROJECT_CONFIG_FILE is included automatically on a
per-generator basis. It only need contain overrides.

Here's how it works:

o cpack runs

o it includes CPackConfig.cmake

o it iterates over the generators given by the -G command line option,
or if no such option was specified, over the list of generators given
by the CPACK_GENERATOR variable set in the CPackConfig.cmake input
file.

o foreach generator, it then

o sets CPACK_GENERATOR to the one currently being iterated

o includes the CPACK_PROJECT_CONFIG_FILE

o produces the package for that generator

This is the key: For each generator listed in CPACK_GENERATOR in
CPackConfig.cmake, cpack will reset CPACK_GENERATOR internally to the
one currently being used and then include the
CPACK_PROJECT_CONFIG_FILE.

For a list of available generators, see cpack-generators(7).

Targets package and package_source
If CMake is run with the Makefile, Ninja, or Xcode generator, then
include(CPack) generates a target package. This makes it possible to
build a binary installer from CMake, Make, or Ninja: Instead of cpack,
one may call cmake --build . --target package or make package or ninja
package. The VS generator creates an uppercase target PACKAGE.

If CMake is run with the Makefile or Ninja generator, then
include(CPack) also generates a target package_source. To build a
source package, instead of cpack -G TGZ --config
CPackSourceConfig.cmake one may call cmake --build . --target
package_source, make package_source, or ninja package_source.

Variables common to all CPack Generators
Before including this CPack module in your CMakeLists.txt file, there
are a variety of variables that can be set to customize the resulting
installers. The most commonly-used variables are:

CPACK_PACKAGE_NAME
The name of the package (or application). If not specified, it
defaults to the project name.

CPACK_PACKAGE_VENDOR
The name of the package vendor. (e.g., "Kitware"). The default
is "Humanity".

CPACK_PACKAGE_DIRECTORY
The directory in which CPack is doing its packaging. If it is
not set then this will default (internally) to the build dir.
This variable may be defined in a CPack config file or from the
cpack command line option -B. If set, the command line option
overrides the value found in the config file.

CPACK_PACKAGE_VERSION_MAJOR
Package major version. This variable will always be set, but
its default value depends on whether or not version details were
given to the project() command in the top level CMakeLists.txt
file. If version details were given, the default value will be
CMAKE_PROJECT_VERSION_MAJOR. If no version details were given,
a default version of 0.1.1 will be assumed, leading to
CPACK_PACKAGE_VERSION_MAJOR having a default value of 0.

CPACK_PACKAGE_VERSION_MINOR
Package minor version. The default value is determined based on
whether or not version details were given to the project()
command in the top level CMakeLists.txt file. If version
details were given, the default value will be
CMAKE_PROJECT_VERSION_MINOR, but if no minor version component
was specified then CPACK_PACKAGE_VERSION_MINOR will be left
unset. If no project version was given at all, a default
version of 0.1.1 will be assumed, leading to
CPACK_PACKAGE_VERSION_MINOR having a default value of 1.

CPACK_PACKAGE_VERSION_PATCH
Package patch version. The default value is determined based on
whether or not version details were given to the project()
command in the top level CMakeLists.txt file. If version
details were given, the default value will be
CMAKE_PROJECT_VERSION_PATCH, but if no patch version component
was specified then CPACK_PACKAGE_VERSION_PATCH will be left
unset. If no project version was given at all, a default
version of 0.1.1 will be assumed, leading to
CPACK_PACKAGE_VERSION_PATCH having a default value of 1.

CPACK_PACKAGE_DESCRIPTION
A description of the project, used in places such as the
introduction screen of CPack-generated Windows installers. If
not set, the value of this variable is populated from the file
named by CPACK_PACKAGE_DESCRIPTION_FILE.

CPACK_PACKAGE_DESCRIPTION_FILE
A text file used to describe the project when
CPACK_PACKAGE_DESCRIPTION is not explicitly set. The default
value for CPACK_PACKAGE_DESCRIPTION_FILE points to a built-in
template file Templates/CPack.GenericDescription.txt.

CPACK_PACKAGE_DESCRIPTION_SUMMARY
Short description of the project (only a few words). If the
CMAKE_PROJECT_DESCRIPTION variable is set, it is used as the
default value, otherwise the default will be a string generated
by CMake based on CMAKE_PROJECT_NAME.

CPACK_PACKAGE_HOMEPAGE_URL
Project homepage URL. The default value is taken from the
CMAKE_PROJECT_HOMEPAGE_URL variable, which is set by the top
level project() command, or else the default will be empty if no
URL was provided to project().

CPACK_PACKAGE_FILE_NAME
The name of the package file to generate, not including the
extension. For example, cmake-2.6.1-Linux-i686. The default
value is:

${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}-${CPACK_SYSTEM_NAME}

CPACK_PACKAGE_INSTALL_DIRECTORY
Installation directory on the target system. This may be used by
some CPack generators like NSIS to create an installation
directory e.g., "CMake 2.5" below the installation prefix. All
installed elements will be put inside this directory.

CPACK_PACKAGE_ICON
A branding image that will be displayed inside the installer
(used by GUI installers).

CPACK_PACKAGE_CHECKSUM
Added in version 3.7.

An algorithm that will be used to generate an additional file
with the checksum of the package. The output file name will be:

${CPACK_PACKAGE_FILE_NAME}.${CPACK_PACKAGE_CHECKSUM}

Supported algorithms are those listed by the string(<HASH>)
command.

CPACK_PROJECT_CONFIG_FILE
CPack-time project CPack configuration file. This file is
included at cpack time, once per generator after CPack has set
CPACK_GENERATOR to the actual generator being used. It allows
per-generator setting of CPACK_* variables at cpack time.

CPACK_RESOURCE_FILE_LICENSE
License to be embedded in the installer. It will typically be
displayed to the user by the produced installer (often with an
explicit "Accept" button, for graphical installers) prior to
installation. This license file is NOT added to the installed
files but is used by some CPack generators like NSIS. If you
want to use UTF-8 characters, the file needs to be encoded in
UTF-8 BOM. If you want to install a license file (may be the
same as this one) along with your project, you must add an
appropriate CMake install() command in your CMakeLists.txt.

CPACK_RESOURCE_FILE_README
ReadMe file to be embedded in the installer. It typically
describes in some detail the purpose of the project during the
installation. Not all CPack generators use this file.

CPACK_RESOURCE_FILE_WELCOME
Welcome file to be embedded in the installer. It welcomes users
to this installer. Typically used in the graphical installers
on Windows and Mac OS X.

CPACK_MONOLITHIC_INSTALL
Disables the component-based installation mechanism. When set,
the component specification is ignored and all installed items
are put in a single "MONOLITHIC" package. Some CPack generators
do monolithic packaging by default and may be asked to do
component packaging by setting CPACK_<GENNAME>_COMPONENT_INSTALL
to TRUE.

CPACK_GENERATOR
List of CPack generators to use. If not specified, CPack will
create a set of options following the naming pattern
CPACK_BINARY_<GENNAME> (e.g. CPACK_BINARY_NSIS) allowing the
user to enable/disable individual generators. If the -G option
is given on the cpack command line, it will override this
variable and any CPACK_BINARY_<GENNAME> options.

CPACK_OUTPUT_CONFIG_FILE
The name of the CPack binary configuration file. This file is
the CPack configuration generated by the CPack module for binary
installers. Defaults to CPackConfig.cmake.

CPACK_PACKAGE_EXECUTABLES
Lists each of the executables and associated text label to be
used to create Start Menu shortcuts. For example, setting this
to the list ccmake;CMake will create a shortcut named "CMake"
that will execute the installed executable ccmake. Not all CPack
generators use it (at least NSIS, Inno Setup and WIX do).

CPACK_STRIP_FILES
List of files to be stripped. Starting with CMake 2.6.0,
CPACK_STRIP_FILES will be a boolean variable which enables
stripping of all files (a list of files evaluates to TRUE in
CMake, so this change is compatible).

CPACK_VERBATIM_VARIABLES
Added in version 3.4.

If set to TRUE, values of variables prefixed with CPACK_ will be
escaped before being written to the configuration files, so that
the cpack program receives them exactly as they were specified.
If not, characters like quotes and backslashes can cause parsing
errors or alter the value received by the cpack program.
Defaults to FALSE for backwards compatibility.

CPACK_THREADS
Added in version 3.20.

Number of threads to use when performing parallelized
operations, such as compressing the installer package.

Some compression methods used by CPack generators such as Debian
or Archive may take advantage of multiple CPU cores to speed up
compression. CPACK_THREADS can be set to specify how many
threads will be used for compression.

A positive integer can be used to specify an exact desired
thread count.

When given a negative integer CPack will use the absolute value
as the upper limit but may choose a lower value based on the
available hardware concurrency.

Given 0 CPack will try to use all available CPU cores.

By default CPACK_THREADS is set to 1.

The following compression methods may take advantage of multiple
cores:

xz Supported if CMake is built with a liblzma that supports
parallel compression.

Added in version 3.21: Official CMake binaries available
on cmake.org now ship with a liblzma that supports
parallel compression. Older versions did not.

zstd Added in version 3.24.

Supported if CMake is built with libarchive 3.6 or
higher. Official CMake binaries available on cmake.org
support it.

Other compression methods ignore this value and use only one
thread.

Variables for Source Package Generators
The following CPack variables are specific to source packages, and will
not affect binary packages:

CPACK_SOURCE_PACKAGE_FILE_NAME
The name of the source package. For example cmake-2.6.1.

CPACK_SOURCE_STRIP_FILES
List of files in the source tree that will be stripped.
Starting with CMake 2.6.0, CPACK_SOURCE_STRIP_FILES will be a
boolean variable which enables stripping of all files (a list of
files evaluates to TRUE in CMake, so this change is compatible).

CPACK_SOURCE_GENERATOR
List of generators used for the source packages. As with
CPACK_GENERATOR, if this is not specified then CPack will create
a set of options (e.g. CPACK_SOURCE_ZIP) allowing users to
select which packages will be generated.

CPACK_SOURCE_OUTPUT_CONFIG_FILE
The name of the CPack source configuration file. This file is
the CPack configuration generated by the CPack module for source
installers. Defaults to CPackSourceConfig.cmake.

CPACK_SOURCE_IGNORE_FILES
Pattern of files in the source tree that won't be packaged when
building a source package. This is a list of regular expression
patterns (that must be properly escaped), e.g.,
/CVS/;/\\.svn/;\\.swp$;\\.#;/#;.*~;cscope.*

Variables for Advanced Use
The following variables are for advanced uses of CPack:

CPACK_CMAKE_GENERATOR
What CMake generator should be used if the project is a CMake
project. Defaults to the value of CMAKE_GENERATOR. Few users
will want to change this setting.

CPACK_INSTALL_CMAKE_PROJECTS
List of four values that specify what project to install. The
four values are: Build directory, Project Name, Project
Component, Directory. If omitted, CPack will build an installer
that installs everything.

CPACK_SYSTEM_NAME
System name, defaults to the value of CMAKE_SYSTEM_NAME, except
on Windows where it will be win32 or win64.

CPACK_PACKAGE_VERSION
Package full version, used internally. By default, this is
built from CPACK_PACKAGE_VERSION_MAJOR,
CPACK_PACKAGE_VERSION_MINOR, and CPACK_PACKAGE_VERSION_PATCH.

CPACK_TOPLEVEL_TAG
Directory for the installed files.

CPACK_INSTALL_COMMANDS
Extra commands to install components. The environment variable
CMAKE_INSTALL_PREFIX is set to the temporary install directory
during execution.

CPACK_INSTALL_SCRIPTS
Added in version 3.16.

Extra CMake scripts executed by CPack during its local staging
installation. They are executed before installing the files to
be packaged. The scripts are not called by a standalone install
(e.g.: make install). For every script, the following variables
will be set: CMAKE_CURRENT_SOURCE_DIR, CMAKE_CURRENT_BINARY_DIR
and CMAKE_INSTALL_PREFIX (which is set to the staging install
directory). The singular form CMAKE_INSTALL_SCRIPT is supported
as an alternative variable for historical reasons, but its value
is ignored if CMAKE_INSTALL_SCRIPTS is set and a warning will be
issued.

See also CPACK_PRE_BUILD_SCRIPTS and CPACK_POST_BUILD_SCRIPTS
which can be used to specify scripts to be executed later in the
packaging process.

CPACK_PRE_BUILD_SCRIPTS
Added in version 3.19.

List of CMake scripts to execute after CPack has installed the
files to be packaged into a staging directory and before
producing the package(s) from those files. See also
CPACK_INSTALL_SCRIPTS and CPACK_POST_BUILD_SCRIPTS.

CPACK_POST_BUILD_SCRIPTS
Added in version 3.19.

List of CMake scripts to execute after CPack has produced the
resultant packages and before copying them back to the build
directory. See also CPACK_INSTALL_SCRIPTS,
CPACK_PRE_BUILD_SCRIPTS and CPACK_PACKAGE_FILES.

CPACK_PACKAGE_FILES
Added in version 3.19.

List of package files created in the staging directory, with
each file provided as a full absolute path. This variable is
populated by CPack just before invoking the post-build scripts
listed in CPACK_POST_BUILD_SCRIPTS. It is the preferred way for
the post-build scripts to know the set of package files to
operate on. Projects should not try to set this variable
themselves.

CPACK_INSTALLED_DIRECTORIES
Extra directories to install.

CPACK_PACKAGE_INSTALL_REGISTRY_KEY
Registry key used when installing this project. This is only
used by installers for Windows. The default value is based on
the installation directory.

CPACK_CREATE_DESKTOP_LINKS
List of desktop links to create. Each desktop link requires a
corresponding start menu shortcut as created by
CPACK_PACKAGE_EXECUTABLES.

CPACK_BINARY_<GENNAME>
CPack generated options for binary generators. The CPack.cmake
module generates (when CPACK_GENERATOR is not set) a set of
CMake options (see CMake option() command) which may then be
used to select the CPack generator(s) to be used when building
the package target or when running cpack without the -G option.

CPACK_READELF_EXECUTABLE
Added in version 3.25.

Specify the readelf executable path used by CPack. The default
value will be taken from the CMAKE_READELF variable, if set,
which may be populated by an internal CMake module. If
CMAKE_READELF is not set, CPack will use find_program() to
determine the readelf path when needed.

CPACK_OBJCOPY_EXECUTABLE
Added in version 3.25.

Specify the objcopy executable path used by CPack. The default
value will be taken from the CMAKE_OBJCOPY variable, if set,
which may be populated by an internal CMake module. If
CMAKE_OBJCOPY is not set, CPack will use find_program() to
determine the objcopy path when needed.

CPACK_OBJDUMP_EXECUTABLE
Added in version 3.25.

Specify the objdump executable path used by CPack. The default
value will be taken from the CMAKE_OBJDUMP variable, if set,
which may be populated by an internal CMake module. If
CMAKE_OBJDUMP is not set, CPack will use find_program() to
determine the objdump path when needed.

CPackComponent
Configure components for binary installers and source packages.

Introduction
This module is automatically included by CPack.

Certain binary installers (especially the graphical installers)
generated by CPack allow users to select individual application
components to install. This module allows developers to configure the
packaging of such components.

Contents is assigned to components by the COMPONENT argument of CMake's
install() command. Components can be annotated with user-friendly
names and descriptions, inter-component dependencies, etc., and grouped
in various ways to customize the resulting installer, using the
commands described below.

To specify different groupings for different CPack generators use a
CPACK_PROJECT_CONFIG_FILE.

Variables
The following variables influence the component-specific packaging:

CPACK_COMPONENTS_ALL
The list of component to install.

The default value of this variable is computed by CPack and
contains all components defined by the project. The user may
set it to only include the specified components.

Instead of specifying all the desired components, it is possible
to obtain a list of all defined components and then remove the
unwanted ones from the list. The get_cmake_property() command
can be used to obtain the COMPONENTS property, then the
list(REMOVE_ITEM) command can be used to remove the unwanted
ones. For example, to use all defined components except foo and
bar:

get_cmake_property(CPACK_COMPONENTS_ALL COMPONENTS)
list(REMOVE_ITEM CPACK_COMPONENTS_ALL "foo" "bar")

CPACK_<GENNAME>_COMPONENT_INSTALL
Enable/Disable component install for CPack generator <GENNAME>.

Each CPack Generator (RPM, DEB, ARCHIVE, NSIS, DMG, etc...) has
a legacy default behavior. e.g. RPM builds monolithic whereas
NSIS builds component. One can change the default behavior by
setting this variable to 0/1 or OFF/ON.

CPACK_COMPONENTS_GROUPING
Specify how components are grouped for multi-package
component-aware CPack generators.

Some generators like RPM or ARCHIVE (TGZ, ZIP, ...) may generate
several packages files when there are components, depending on
the value of this variable:

o ONE_PER_GROUP (default): create one package per component
group

o IGNORE : create one package per component (ignore the groups)

o ALL_COMPONENTS_IN_ONE : create a single package with all
requested components

CPACK_COMPONENT_<compName>_DISPLAY_NAME
The name to be displayed for a component.

CPACK_COMPONENT_<compName>_DESCRIPTION
The description of a component.

CPACK_COMPONENT_<compName>_GROUP
The group of a component.

CPACK_COMPONENT_<compName>_DEPENDS
The dependencies (list of components) on which this component
depends.

CPACK_COMPONENT_<compName>_HIDDEN
True if this component is hidden from the user.

CPACK_COMPONENT_<compName>_REQUIRED
True if this component is required.

CPACK_COMPONENT_<compName>_DISABLED
True if this component is not selected to be installed by
default.

Commands
Add component

cpack_add_component

Describe an installation component.

cpack_add_component(compname
[DISPLAY_NAME name]
[DESCRIPTION description]
[HIDDEN | REQUIRED | DISABLED ]
[GROUP group]
[DEPENDS comp1 comp2 ... ]
[INSTALL_TYPES type1 type2 ... ]
[DOWNLOADED]
[ARCHIVE_FILE filename]
[PLIST filename])

compname is the name of an installation component, as defined by the
COMPONENT argument of one or more CMake install() commands. With the
cpack_add_component command one can set a name, a description, and
other attributes of an installation component. One can also assign a
component to a component group.

DISPLAY_NAME is the displayed name of the component, used in graphical
installers to display the component name. This value can be any
string.

DESCRIPTION is an extended description of the component, used in
graphical installers to give the user additional information about the
component. Descriptions can span multiple lines using \n as the line
separator. Typically, these descriptions should be no more than a few
lines long.

HIDDEN indicates that this component will be hidden in the graphical
installer, so that the user cannot directly change whether it is
installed or not.

REQUIRED indicates that this component is required, and therefore will
always be installed. It will be visible in the graphical installer,
but it cannot be unselected. (Typically, required components are shown
grayed out).

DISABLED indicates that this component should be disabled (unselected)
by default. The user is free to select this component for
installation, unless it is also HIDDEN.

DEPENDS lists the components on which this component depends. If this
component is selected, then each of the components listed must also be
selected. The dependency information is encoded within the installer
itself, so that users cannot install inconsistent sets of components.

GROUP names the component group of which this component is a part. If
not provided, the component will be a standalone component, not part of
any component group. Component groups are described with the
cpack_add_component_group command, detailed below.

INSTALL_TYPES lists the installation types of which this component is a
part. When one of these installations types is selected, this
component will automatically be selected. Installation types are
described with the cpack_add_install_type command, detailed below.

DOWNLOADED indicates that this component should be downloaded
on-the-fly by the installer, rather than packaged in with the installer
itself. For more information, see the cpack_configure_downloads
command.

ARCHIVE_FILE provides a name for the archive file created by CPack to
be used for downloaded components. If not supplied, CPack will create
a file with some name based on CPACK_PACKAGE_FILE_NAME and the name of
the component. See cpack_configure_downloads for more information.

PLIST gives a filename that is passed to pkgbuild with the
--component-plist argument when using the productbuild generator.

Add component group

cpack_add_component_group

Describes a group of related CPack installation components.

cpack_add_component_group(groupname
[DISPLAY_NAME name]
[DESCRIPTION description]
[PARENT_GROUP parent]
[EXPANDED]
[BOLD_TITLE])

The cpack_add_component_group describes a group of installation
components, which will be placed together within the listing of
options. Typically, component groups allow the user to select/deselect
all of the components within a single group via a single group-level
option. Use component groups to reduce the complexity of installers
with many options. groupname is an arbitrary name used to identify the
group in the GROUP argument of the cpack_add_component command, which
is used to place a component in a group. The name of the group must
not conflict with the name of any component.

DISPLAY_NAME is the displayed name of the component group, used in
graphical installers to display the component group name. This value
can be any string.

DESCRIPTION is an extended description of the component group, used in
graphical installers to give the user additional information about the
components within that group. Descriptions can span multiple lines
using \n as the line separator. Typically, these descriptions should
be no more than a few lines long.

PARENT_GROUP, if supplied, names the parent group of this group.
Parent groups are used to establish a hierarchy of groups, providing an
arbitrary hierarchy of groups.

EXPANDED indicates that, by default, the group should show up as
"expanded", so that the user immediately sees all of the components
within the group. Otherwise, the group will initially show up as a
single entry.

BOLD_TITLE indicates that the group title should appear in bold, to
call the user's attention to the group.

Add installation type

cpack_add_install_type

Add a new installation type containing a set of predefined component
selections to the graphical installer.

cpack_add_install_type(typename
[DISPLAY_NAME name])

The cpack_add_install_type command identifies a set of preselected
components that represents a common use case for an application. For
example, a "Developer" install type might include an application along
with its header and library files, while an "End user" install type
might just include the application's executable. Each component
identifies itself with one or more install types via the INSTALL_TYPES
argument to cpack_add_component.

DISPLAY_NAME is the displayed name of the install type, which will
typically show up in a drop-down box within a graphical installer.
This value can be any string.

Configure downloads

cpack_configure_downloads

Configure CPack to download selected components on-the-fly as part of
the installation process.

cpack_configure_downloads(site
[UPLOAD_DIRECTORY dirname]
[ALL]
[ADD_REMOVE|NO_ADD_REMOVE])

The cpack_configure_downloads command configures installation-time
downloads of selected components. For each downloadable component,
CPack will create an archive containing the contents of that component,
which should be uploaded to the given site. When the user selects that
component for installation, the installer will download and extract the
component in place. This feature is useful for creating small
installers that only download the requested components, saving
bandwidth. Additionally, the installers are small enough that they
will be installed as part of the normal installation process, and the
"Change" button in Windows Add/Remove Programs control panel will allow
one to add or remove parts of the application after the original
installation. On Windows, the downloaded-components functionality
requires the ZipDLL plug-in for NSIS, available at:

http://nsis.sourceforge.net/ZipDLL_plug-in

On macOS, installers that download components on-the-fly can only be
built and installed on system using macOS 10.5 or later.

The site argument is a URL where the archives for downloadable
components will reside, e.g., https://cmake.org/files/v3.25/ All of the
archives produced by CPack should be uploaded to that location.

UPLOAD_DIRECTORY is the local directory where CPack will create the
various archives for each of the components. The contents of this
directory should be uploaded to a location accessible by the URL given
in the site argument. If omitted, CPack will use the directory
CPackUploads inside the CMake binary directory to store the generated
archives.

The ALL flag indicates that all components be downloaded. Otherwise,
only those components explicitly marked as DOWNLOADED or that have a
specified ARCHIVE_FILE will be downloaded. Additionally, the ALL
option implies ADD_REMOVE (unless NO_ADD_REMOVE is specified).

ADD_REMOVE indicates that CPack should install a copy of the installer
that can be called from Windows' Add/Remove Programs dialog (via the
"Modify" button) to change the set of installed components.
NO_ADD_REMOVE turns off this behavior. This option is ignored on Mac
OS X.

CPackIFW
Added in version 3.1.

This module looks for the location of the command-line utilities
supplied with the Qt Installer Framework (QtIFW).

The module also defines several commands to control the behavior of the
CPack IFW Generator.

Commands
The module defines the following commands:

cpack_ifw_configure_component
Sets the arguments specific to the CPack IFW generator.

cpack_ifw_configure_component(<compname> [COMMON] [ESSENTIAL] [VIRTUAL]
[FORCED_INSTALLATION] [REQUIRES_ADMIN_RIGHTS]
[NAME <name>]
[DISPLAY_NAME <display_name>] # Note: Internationalization supported
[DESCRIPTION <description>] # Note: Internationalization supported
[UPDATE_TEXT <update_text>]
[VERSION <version>]
[RELEASE_DATE <release_date>]
[SCRIPT <script>]
[PRIORITY|SORTING_PRIORITY <sorting_priority>] # Note: PRIORITY is deprecated
[DEPENDS|DEPENDENCIES <com_id> ...]
[AUTO_DEPEND_ON <comp_id> ...]
[LICENSES <display_name> <file_path> ...]
[DEFAULT <value>]
[USER_INTERFACES <file_path> <file_path> ...]
[TRANSLATIONS <file_path> <file_path> ...]
[REPLACES <comp_id> ...]
[CHECKABLE <value>])

This command should be called after cpack_add_component()
command.

COMMON if set, then the component will be packaged and installed
as part of a group to which it belongs.

ESSENTIAL
Added in version 3.6.

if set, then the package manager stays disabled until
that component is updated.

VIRTUAL
Added in version 3.8.

if set, then the component will be hidden from the
installer. It is a equivalent of the HIDDEN option from
the cpack_add_component() command.

FORCED_INSTALLATION
Added in version 3.8.

if set, then the component must always be installed. It
is a equivalent of the REQUIRED option from the
cpack_add_component() command.

REQUIRES_ADMIN_RIGHTS
Added in version 3.8.

set it if the component needs to be installed with
elevated permissions.

NAME is used to create domain-like identification for this
component. By default used origin component name.

DISPLAY_NAME
Added in version 3.8.

set to rewrite original name configured by
cpack_add_component() command.

DESCRIPTION
Added in version 3.8.

set to rewrite original description configured by
cpack_add_component() command.

UPDATE_TEXT
Added in version 3.8.

will be added to the component description if this is an
update to the component.

VERSION
is version of component. By default used
CPACK_PACKAGE_VERSION.

RELEASE_DATE
Added in version 3.8.

keep empty to auto generate.

SCRIPT is a relative or absolute path to operations script for
this component.

SORTING_PRIORITY
Added in version 3.8.

is priority of the component in the tree.

PRIORITY
Deprecated since version 3.8: Old name for
SORTING_PRIORITY.

DEPENDS, DEPENDENCIES
Added in version 3.8.

list of dependency component or component group
identifiers in QtIFW style.

Added in version 3.21.

Component or group names listed as dependencies may
contain hyphens. This requires QtIFW 3.1 or later.

AUTO_DEPEND_ON
Added in version 3.8.

list of identifiers of component or component group in
QtIFW style that this component has an automatic
dependency on.

LICENSES
pair of <display_name> and <file_path> of license text
for this component. You can specify more then one
license.

DEFAULT
Added in version 3.8.

Possible values are: TRUE, FALSE, and SCRIPT. Set to
FALSE to disable the component in the installer or to
SCRIPT to resolved during runtime (don't forget add the
file of the script as a value of the SCRIPT option).

USER_INTERFACES
Added in version 3.7.

is a list of <file_path> ('.ui' files) representing pages
to load.

TRANSLATIONS
Added in version 3.8.

is a list of <file_path> ('.qm' files) representing
translations to load.

REPLACES
Added in version 3.10.

list of identifiers of component or component group to
replace.

CHECKABLE
Added in version 3.10.

Possible values are: TRUE, FALSE. Set to FALSE if you
want to hide the checkbox for an item. This is useful
when only a few subcomponents should be selected instead
of all.

cpack_ifw_configure_component_group
Sets the arguments specific to the CPack IFW generator.

cpack_ifw_configure_component_group(<groupname> [VIRTUAL]
[FORCED_INSTALLATION] [REQUIRES_ADMIN_RIGHTS]
[NAME <name>]
[DISPLAY_NAME <display_name>] # Note: Internationalization supported
[DESCRIPTION <description>] # Note: Internationalization supported
[UPDATE_TEXT <update_text>]
[VERSION <version>]
[RELEASE_DATE <release_date>]
[SCRIPT <script>]
[PRIORITY|SORTING_PRIORITY <sorting_priority>] # Note: PRIORITY is deprecated
[DEPENDS|DEPENDENCIES <com_id> ...]
[AUTO_DEPEND_ON <comp_id> ...]
[LICENSES <display_name> <file_path> ...]
[DEFAULT <value>]
[USER_INTERFACES <file_path> <file_path> ...]
[TRANSLATIONS <file_path> <file_path> ...]
[REPLACES <comp_id> ...]
[CHECKABLE <value>])

This command should be called after cpack_add_component_group()
command.

VIRTUAL
Added in version 3.8.

if set, then the group will be hidden from the installer.
Note that setting this on a root component does not work.

FORCED_INSTALLATION
Added in version 3.8.

if set, then the group must always be installed.

REQUIRES_ADMIN_RIGHTS
Added in version 3.8.

set it if the component group needs to be installed with
elevated permissions.

NAME is used to create domain-like identification for this
component group. By default used origin component group
name.

DISPLAY_NAME
Added in version 3.8.

set to rewrite original name configured by
cpack_add_component_group() command.

DESCRIPTION
Added in version 3.8.

set to rewrite original description configured by
cpack_add_component_group() command.

UPDATE_TEXT
Added in version 3.8.

will be added to the component group description if this
is an update to the component group.

VERSION
is version of component group. By default used
CPACK_PACKAGE_VERSION.

RELEASE_DATE
Added in version 3.8.

keep empty to auto generate.

SCRIPT is a relative or absolute path to operations script for
this component group.

SORTING_PRIORITY
is priority of the component group in the tree.

PRIORITY
Deprecated since version 3.8: Old name for
SORTING_PRIORITY.

DEPENDS, DEPENDENCIES
Added in version 3.8.

list of dependency component or component group
identifiers in QtIFW style.

Added in version 3.21.

Component or group names listed as dependencies may
contain hyphens. This requires QtIFW 3.1 or later.

AUTO_DEPEND_ON
Added in version 3.8.

list of identifiers of component or component group in
QtIFW style that this component group has an automatic
dependency on.

LICENSES
pair of <display_name> and <file_path> of license text
for this component group. You can specify more then one
license.

DEFAULT
Added in version 3.8.

Possible values are: TRUE, FALSE, and SCRIPT. Set to
TRUE to preselect the group in the installer (this takes
effect only on groups that have no visible child
components) or to SCRIPT to resolved during runtime
(don't forget add the file of the script as a value of
the SCRIPT option).

USER_INTERFACES
Added in version 3.7.

is a list of <file_path> ('.ui' files) representing pages
to load.

TRANSLATIONS
Added in version 3.8.

is a list of <file_path> ('.qm' files) representing
translations to load.

REPLACES
Added in version 3.10.

list of identifiers of component or component group to
replace.

CHECKABLE
Added in version 3.10.

Possible values are: TRUE, FALSE. Set to FALSE if you
want to hide the checkbox for an item. This is useful
when only a few subcomponents should be selected instead
of all.

cpack_ifw_add_repository
Add QtIFW specific remote repository to binary installer.

cpack_ifw_add_repository(<reponame> [DISABLED]
URL <url>
[USERNAME <username>]
[PASSWORD <password>]
[DISPLAY_NAME <display_name>])

This command will also add the <reponame> repository to a
variable CPACK_IFW_REPOSITORIES_ALL.

DISABLED
if set, then the repository will be disabled by default.

URL is points to a list of available components.

USERNAME
is used as user on a protected repository.

PASSWORD
is password to use on a protected repository.

DISPLAY_NAME
is string to display instead of the URL.

cpack_ifw_update_repository
Added in version 3.6.

Update QtIFW specific repository from remote repository.

cpack_ifw_update_repository(<reponame>
[[ADD|REMOVE] URL <url>]|
[REPLACE OLD_URL <old_url> NEW_URL <new_url>]]
[USERNAME <username>]
[PASSWORD <password>]
[DISPLAY_NAME <display_name>])

This command will also add the <reponame> repository to a
variable CPACK_IFW_REPOSITORIES_ALL.

URL is points to a list of available components.

OLD_URL
is points to a list that will replaced.

NEW_URL
is points to a list that will replace to.

USERNAME
is used as user on a protected repository.

PASSWORD
is password to use on a protected repository.

DISPLAY_NAME
is string to display instead of the URL.

cpack_ifw_add_package_resources
Added in version 3.7.

Add additional resources in the installer binary.

cpack_ifw_add_package_resources(<file_path> <file_path> ...)

This command will also add the specified files to a variable
CPACK_IFW_PACKAGE_RESOURCES.

CPackIFWConfigureFile
Added in version 3.8.

The module defines configure_file() similar command to configure file
templates prepared in QtIFW/SDK/Creator style.

Commands
The module defines the following commands:

cpack_ifw_configure_file
Copy a file to another location and modify its contents.

cpack_ifw_configure_file(<input> <output>)

Copies an <input> file to an <output> file and substitutes
variable values referenced as %{VAR} or %VAR% in the input file
content. Each variable reference will be replaced with the
current value of the variable, or the empty string if the
variable is not defined.

CSharpUtilities
Added in version 3.8.

Functions to make configuration of CSharp/.NET targets easier.

A collection of CMake utility functions useful for dealing with CSharp
targets for Visual Studio generators from version 2010 and later.

The following functions are provided by this module:

Main functions

o csharp_set_windows_forms_properties()

o csharp_set_designer_cs_properties()

o csharp_set_xaml_cs_properties()

Helper functions

o csharp_get_filename_keys()

o csharp_get_filename_key_base()

o csharp_get_dependentupon_name()

Main functions provided by the module

csharp_set_windows_forms_properties
Sets source file properties for use of Windows Forms. Use this,
if your CSharp target uses Windows Forms:

csharp_set_windows_forms_properties([<file1> [<file2> [...]]])

<fileN>
List of all source files which are relevant for setting
the VS_CSHARP_<tagname> properties (including .cs, .resx
and .Designer.cs extensions).

In the list of all given files for all files ending with
.Designer.cs and .resx is searched. For every designer or
resource file a file with the same base name but only .cs as
extension is searched. If this is found, the
VS_CSHARP_<tagname> properties are set as follows:

for the .cs file:

o VS_CSHARP_SubType "Form"

for the .Designer.cs file (if it exists):

o VS_CSHARP_DependentUpon <cs-filename>

o VS_CSHARP_DesignTime "" (delete tag if previously
defined)

o VS_CSHARP_AutoGen ""(delete tag if previously defined)

for the .resx file (if it exists):

o VS_RESOURCE_GENERATOR "" (delete tag if previously
defined)

o VS_CSHARP_DependentUpon <cs-filename>

o VS_CSHARP_SubType "Designer"

csharp_set_designer_cs_properties
Sets source file properties of .Designer.cs files depending on
sibling filenames. Use this, if your CSharp target does not use
Windows Forms (for Windows Forms use
csharp_set_windows_forms_properties() instead):

csharp_set_designer_cs_properties([<file1> [<file2> [...]]])

<fileN>
List of all source files which are relevant for setting
the VS_CSHARP_<tagname> properties (including .cs, .resx,
.settings and .Designer.cs extensions).

In the list of all given files for all files ending with
.Designer.cs is searched. For every designer file all files with
the same base name but different extensions are searched. If a
match is found, the source file properties of the designer file
are set depending on the extension of the matched file:

if match is .resx file:

o VS_CSHARP_AutoGen "True"

o VS_CSHARP_DesignTime "True"

o VS_CSHARP_DependentUpon <resx-filename>

if match is .cs file:

o VS_CSHARP_DependentUpon <cs-filename>

if match is .settings file:

o VS_CSHARP_AutoGen "True"

o VS_CSHARP_DesignTimeSharedInput "True"

o VS_CSHARP_DependentUpon <settings-filename>

NOTE:
Because the source file properties of the .Designer.cs file are set
according to the found matches and every match sets the
VS_CSHARP_DependentUpon property, there should only be one match for
each Designer.cs file.

csharp_set_xaml_cs_properties
Sets source file properties for use of Windows Presentation
Foundation (WPF) and XAML. Use this, if your CSharp target uses
WPF/XAML:

csharp_set_xaml_cs_properties([<file1> [<file2> [...]]])

<fileN>
List of all source files which are relevant for setting
the VS_CSHARP_<tagname> properties (including .cs, .xaml,
and .xaml.cs extensions).

In the list of all given files for all files ending with
.xaml.cs is searched. For every xaml-cs file, a file with the
same base name but extension .xaml is searched. If a match is
found, the source file properties of the .xaml.cs file are set:

o VS_CSHARP_DependentUpon <xaml-filename>

Helper functions which are used by the above ones

csharp_get_filename_keys
Helper function which computes a list of key values to identify
source files independently of relative/absolute paths given in
cmake and eliminates case sensitivity:

csharp_get_filename_keys(OUT [<file1> [<file2> [...]]])

OUT Name of the variable in which the list of keys is stored

<fileN>
filename(s) as given to CSharp target using add_library()
or add_executable()

In some way the function applies a canonicalization to the
source names. This is necessary to find file matches if the
files have been added to the target with different directory
prefixes:

add_library(lib
myfile.cs
${CMAKE_CURRENT_SOURCE_DIR}/myfile.Designer.cs)

set_source_files_properties(myfile.Designer.cs PROPERTIES
VS_CSHARP_DependentUpon myfile.cs)

# this will fail, because in cmake
# - ${CMAKE_CURRENT_SOURCE_DIR}/myfile.Designer.cs
# - myfile.Designer.cs
# are not the same source file. The source file property is not set.

csharp_get_filename_key_base
Returns the full filepath and name without extension of a key.
KEY is expected to be a key from csharp_get_filename_keys. In
BASE the value of KEY without the file extension is returned:

csharp_get_filename_key_base(BASE KEY)

BASE Name of the variable with the computed "base" of KEY.

KEY The key of which the base will be computed. Expected to
be a upper case full filename.

csharp_get_dependentupon_name
Computes a string which can be used as value for the source file
property VS_CSHARP_<tagname> with target being DependentUpon:

csharp_get_dependentupon_name(NAME FILE)

NAME Name of the variable with the result value

FILE Filename to convert to <DependentUpon> value

Actually this is only the filename without any path given at the
moment.

CTest
Configure a project for testing with CTest/CDash

Include this module in the top CMakeLists.txt file of a project to
enable testing with CTest and dashboard submissions to CDash:

project(MyProject)
...
include(CTest)

The module automatically creates a BUILD_TESTING option that selects
whether to enable testing support (ON by default). After including the
module, use code like:

if(BUILD_TESTING)
# ... CMake code to create tests ...
endif()

to creating tests when testing is enabled.

To enable submissions to a CDash server, create a CTestConfig.cmake
file at the top of the project with content such as:

set(CTEST_NIGHTLY_START_TIME "01:00:00 UTC")
set(CTEST_SUBMIT_URL "http://my.cdash.org/submit.php?project=MyProject")

(the CDash server can provide the file to a project administrator who
configures MyProject). Settings in the config file are shared by both
this CTest module and the ctest(1) command-line Dashboard Client mode
(ctest -S).

While building a project for submission to CDash, CTest scans the build
output for errors and warnings and reports them with surrounding
context from the build log. This generic approach works for all build
tools, but does not give details about the command invocation that
produced a given problem. One may get more detailed reports by setting
the CTEST_USE_LAUNCHERS variable:

set(CTEST_USE_LAUNCHERS 1)

in the CTestConfig.cmake file.

CTestCoverageCollectGCOV
Added in version 3.2.

This module provides the ctest_coverage_collect_gcov function.

This function runs gcov on all .gcda files found in the binary tree and
packages the resulting .gcov files into a tar file. This tarball also
contains the following:

o data.json defines the source and build directories for use by CDash.

o Labels.json indicates any LABELS that have been set on the source
files.

o The uncovered directory holds any uncovered files found by
CTEST_EXTRA_COVERAGE_GLOB.

After generating this tar file, it can be sent to CDash for display
with the ctest_submit(CDASH_UPLOAD) command.

ctest_coverage_collect_gcov

ctest_coverage_collect_gcov(TARBALL <tarfile>
[SOURCE <source_dir>][BUILD <build_dir>]
[GCOV_COMMAND <gcov_command>]
[GCOV_OPTIONS <options>...]
)

Run gcov and package a tar file for CDash. The options are:

TARBALL <tarfile>
Specify the location of the .tar file to be created for
later upload to CDash. Relative paths will be
interpreted with respect to the top-level build
directory.

TARBALL_COMPRESSION <option>
Added in version 3.18.

Specify a compression algorithm for the TARBALL data
file. Using this option reduces the size of the data
file before it is submitted to CDash. <option> must be
one of GZIP, BZIP2, XZ, ZSTD, FROM_EXT, or an expression
that CMake evaluates as FALSE. The default value is
BZIP2.

If FROM_EXT is specified, the resulting file will be
compressed based on the file extension of the <tarfile>
(i.e. .tar.gz will use GZIP compression). File extensions
that will produce compressed output include .tar.gz,
.tgz, .tar.bzip2, .tbz, .tar.xz, and .txz.

SOURCE <source_dir>
Specify the top-level source directory for the build.
Default is the value of CTEST_SOURCE_DIRECTORY.

BUILD <build_dir>
Specify the top-level build directory for the build.
Default is the value of CTEST_BINARY_DIRECTORY.

GCOV_COMMAND <gcov_command>
Specify the full path to the gcov command on the machine.
Default is the value of CTEST_COVERAGE_COMMAND.

GCOV_OPTIONS <options>...
Specify options to be passed to gcov. The gcov command
is run as gcov <options>... -o <gcov-dir> <file>.gcda.
If not specified, the default option is just -b -x.

GLOB Added in version 3.6.

Recursively search for .gcda files in build_dir rather
than determining search locations by reading
TargetDirectories.txt.

DELETE Added in version 3.6.

Delete coverage files after they've been packaged into
the .tar.

QUIET Suppress non-error messages that otherwise would have
been printed out by this function.

Added in version 3.3: Added support for the
CTEST_CUSTOM_COVERAGE_EXCLUDE variable.

CTestScriptMode
This file is read by ctest in script mode (-S)

CTestUseLaunchers
Set the RULE_LAUNCH_* global properties when CTEST_USE_LAUNCHERS is on.

CTestUseLaunchers is automatically included when you include(CTest).
However, it is split out into its own module file so projects can use
the CTEST_USE_LAUNCHERS functionality independently.

To use launchers, set CTEST_USE_LAUNCHERS to ON in a ctest -S dashboard
script, and then also set it in the cache of the configured project.
Both cmake and ctest need to know the value of it for the launchers to
work properly. CMake needs to know in order to generate proper build
rules, and ctest, in order to produce the proper error and warning
analysis.

For convenience, you may set the ENV variable
CTEST_USE_LAUNCHERS_DEFAULT in your ctest -S script, too. Then, as
long as your CMakeLists uses include(CTest) or
include(CTestUseLaunchers), it will use the value of the ENV variable
to initialize a CTEST_USE_LAUNCHERS cache variable. This cache
variable initialization only occurs if CTEST_USE_LAUNCHERS is not
already defined.

Added in version 3.8: If CTEST_USE_LAUNCHERS is on in a ctest -S script
the ctest_configure command will add -DCTEST_USE_LAUNCHERS:BOOL=TRUE to
the cmake command used to configure the project.

DeployQt4
Functions to help assemble a standalone Qt4 executable.

A collection of CMake utility functions useful for deploying Qt4
executables.

The following functions are provided by this module:

write_qt4_conf
resolve_qt4_paths
fixup_qt4_executable
install_qt4_plugin_path
install_qt4_plugin
install_qt4_executable

Requires CMake 2.6 or greater because it uses function and
PARENT_SCOPE. Also depends on BundleUtilities.cmake.

write_qt4_conf(<qt_conf_dir> <qt_conf_contents>)

Writes a qt.conf file with the <qt_conf_contents> into <qt_conf_dir>.

resolve_qt4_paths(<paths_var> [<executable_path>])

Loop through <paths_var> list and if any don't exist resolve them
relative to the <executable_path> (if supplied) or the
CMAKE_INSTALL_PREFIX.

fixup_qt4_executable(<executable>
[<qtplugins> <libs> <dirs> <plugins_dir> <request_qt_conf>])

Copies Qt plugins, writes a Qt configuration file (if needed) and fixes
up a Qt4 executable using BundleUtilities so it is standalone and can
be drag-and-drop copied to another machine as long as all of the system
libraries are compatible.

<executable> should point to the executable to be fixed-up.

<qtplugins> should contain a list of the names or paths of any Qt
plugins to be installed.

<libs> will be passed to BundleUtilities and should be a list of any
already installed plugins, libraries or executables to also be
fixed-up.

<dirs> will be passed to BundleUtilities and should contain and
directories to be searched to find library dependencies.

<plugins_dir> allows an custom plugins directory to be used.

<request_qt_conf> will force a qt.conf file to be written even if not
needed.

install_qt4_plugin_path(plugin executable copy installed_plugin_path_var
<plugins_dir> <component> <configurations>)

Install (or copy) a resolved <plugin> to the default plugins directory
(or <plugins_dir>) relative to <executable> and store the result in
<installed_plugin_path_var>.

If <copy> is set to TRUE then the plugins will be copied rather than
installed. This is to allow this module to be used at CMake time
rather than install time.

If <component> is set then anything installed will use this COMPONENT.

install_qt4_plugin(plugin executable copy installed_plugin_path_var
<plugins_dir> <component>)

Install (or copy) an unresolved <plugin> to the default plugins
directory (or <plugins_dir>) relative to <executable> and store the
result in <installed_plugin_path_var>. See documentation of
INSTALL_QT4_PLUGIN_PATH.

install_qt4_executable(<executable>
[<qtplugins> <libs> <dirs> <plugins_dir> <request_qt_conf> <component>])

Installs Qt plugins, writes a Qt configuration file (if needed) and
fixes up a Qt4 executable using BundleUtilities so it is standalone and
can be drag-and-drop copied to another machine as long as all of the
system libraries are compatible. The executable will be fixed-up at
install time. <component> is the COMPONENT used for bundle fixup and
plugin installation. See documentation of FIXUP_QT4_BUNDLE.

ExternalData
Manage data files stored outside source tree

Introduction
Use this module to unambiguously reference data files stored outside
the source tree and fetch them at build time from arbitrary local and
remote content-addressed locations. Functions provided by this module
recognize arguments with the syntax DATA{<name>} as references to
external data, replace them with full paths to local copies of those
data, and create build rules to fetch and update the local copies.

For example:

include(ExternalData)
set(ExternalData_URL_TEMPLATES "file:///local/%(algo)/%(hash)"
"file:////host/share/%(algo)/%(hash)"
"http://data.org/%(algo)/%(hash)")
ExternalData_Add_Test(MyData
NAME MyTest
COMMAND MyExe DATA{MyInput.png}
)
ExternalData_Add_Target(MyData)

When test MyTest runs the DATA{MyInput.png} argument will be replaced
by the full path to a real instance of the data file MyInput.png on
disk. If the source tree contains a content link such as
MyInput.png.md5 then the MyData target creates a real MyInput.png in
the build tree.

Module Functions

ExternalData_Expand_Arguments
The ExternalData_Expand_Arguments function evaluates DATA{}
references in its arguments and constructs a new list of
arguments:

ExternalData_Expand_Arguments(
<target> # Name of data management target
<outVar> # Output variable
[args...] # Input arguments, DATA{} allowed
)

It replaces each DATA{} reference in an argument with the full
path of a real data file on disk that will exist after the
<target> builds.

ExternalData_Add_Test
The ExternalData_Add_Test function wraps around the CMake
add_test() command but supports DATA{} references in its
arguments:

ExternalData_Add_Test(
<target> # Name of data management target
... # Arguments of add_test(), DATA{} allowed
)

It passes its arguments through ExternalData_Expand_Arguments
and then invokes the add_test() command using the results.

Changed in version 3.31: If the arguments after <target> define
a test with an executable that is a CMake target, empty values
in the TEST_LAUNCHER and CROSSCOMPILING_EMULATOR properties of
that target are preserved. See policy CMP0178.

ExternalData_Add_Target
The ExternalData_Add_Target function creates a custom target to
manage local instances of data files stored externally:

ExternalData_Add_Target(
<target> # Name of data management target
[SHOW_PROGRESS <ON|OFF>] # Show progress during the download
)

It creates custom commands in the target as necessary to make
data files available for each DATA{} reference previously
evaluated by other functions provided by this module. Data
files may be fetched from one of the URL templates specified in
the ExternalData_URL_TEMPLATES variable, or may be found locally
in one of the paths specified in the ExternalData_OBJECT_STORES
variable.

Added in version 3.20: The SHOW_PROGRESS argument may be passed
to suppress progress information during the download of objects.
If not provided, it defaults to OFF for Ninja and Ninja
Multi-Config generators and ON otherwise.

Typically only one target is needed to manage all external data
within a project. Call this function once at the end of
configuration after all data references have been processed.

Module Variables
The following variables configure behavior. They should be set before
calling any of the functions provided by this module.

ExternalData_BINARY_ROOT
The ExternalData_BINARY_ROOT variable may be set to the
directory to hold the real data files named by expanded DATA{}
references. The default is CMAKE_BINARY_DIR. The directory
layout will mirror that of content links under
ExternalData_SOURCE_ROOT.

ExternalData_CUSTOM_SCRIPT_<key>
Added in version 3.2.

Specify a full path to a .cmake custom fetch script identified
by <key> in entries of the ExternalData_URL_TEMPLATES list. See
Custom Fetch Scripts.

ExternalData_LINK_CONTENT
The ExternalData_LINK_CONTENT variable may be set to the name of
a supported hash algorithm to enable automatic conversion of
real data files referenced by the DATA{} syntax into content
links. For each such <file> a content link named <file><ext> is
created. The original file is renamed to the form
.ExternalData_<algo>_<hash> to stage it for future transmission
to one of the locations in the list of URL templates (by means
outside the scope of this module). The data fetch rule created
for the content link will use the staged object if it cannot be
found using any URL template.

ExternalData_NO_SYMLINKS
Added in version 3.3.

The real data files named by expanded DATA{} references may be
made available under ExternalData_BINARY_ROOT using symbolic
links on some platforms. The ExternalData_NO_SYMLINKS variable
may be set to disable use of symbolic links and enable use of
copies instead.

ExternalData_OBJECT_STORES
The ExternalData_OBJECT_STORES variable may be set to a list of
local directories that store objects using the layout
<dir>/%(algo)/%(hash). These directories will be searched first
for a needed object. If the object is not available in any
store then it will be fetched remotely using the URL templates
and added to the first local store listed. If no stores are
specified the default is a location inside the build tree.

ExternalData_SERIES_PARSE

ExternalData_SERIES_PARSE_PREFIX

ExternalData_SERIES_PARSE_NUMBER

ExternalData_SERIES_PARSE_SUFFIX

ExternalData_SERIES_MATCH
See Referencing File Series.

ExternalData_SOURCE_ROOT
The ExternalData_SOURCE_ROOT variable may be set to the highest
source directory containing any path named by a DATA{}
reference. The default is CMAKE_SOURCE_DIR.
ExternalData_SOURCE_ROOT and CMAKE_SOURCE_DIR must refer to
directories within a single source distribution (e.g. they come
together in one tarball).

ExternalData_TIMEOUT_ABSOLUTE
The ExternalData_TIMEOUT_ABSOLUTE variable sets the download
absolute timeout, in seconds, with a default of 300 seconds.
Set to 0 to disable enforcement.

ExternalData_TIMEOUT_INACTIVITY
The ExternalData_TIMEOUT_INACTIVITY variable sets the download
inactivity timeout, in seconds, with a default of 60 seconds.
Set to 0 to disable enforcement.

ExternalData_URL_ALGO_<algo>_<key>
Added in version 3.3.

Specify a custom URL component to be substituted for URL
template placeholders of the form %(algo:<key>), where <key> is
a valid C identifier, when fetching an object referenced via
hash algorithm <algo>. If not defined, the default URL
component is just <algo> for any <key>.

ExternalData_URL_TEMPLATES
The ExternalData_URL_TEMPLATES may be set to provide a list of
URL templates using the placeholders %(algo) and %(hash) in each
template. Data fetch rules try each URL template in order by
substituting the hash algorithm name for %(algo) and the hash
value for %(hash). Alternatively one may use %(algo:<key>) with
ExternalData_URL_ALGO_<algo>_<key> variables to gain more
flexibility in remote URLs.

Referencing Files
Referencing Single Files
The DATA{} syntax is literal and the <name> is a full or relative path
within the source tree. The source tree must contain either a real
data file at <name> or a "content link" at <name><ext> containing a
hash of the real file using a hash algorithm corresponding to <ext>.
For example, the argument DATA{img.png} may be satisfied by either a
real img.png file in the current source directory or a img.png.md5 file
containing its MD5 sum.

Added in version 3.8: Multiple content links of the same name with
different hash algorithms are supported (e.g. img.png.sha256 and
img.png.sha1) so long as they all correspond to the same real file.
This allows objects to be fetched from sources indexed by different
hash algorithms.

Referencing File Series
The DATA{} syntax can be told to fetch a file series using the form
DATA{<name>,:}, where the : is literal. If the source tree contains a
group of files or content links named like a series then a reference to
one member adds rules to fetch all of them. Although all members of a
series are fetched, only the file originally named by the DATA{}
argument is substituted for it. The default configuration recognizes
file series names ending with #.ext, _#.ext, .#.ext, or -#.ext where #
is a sequence of decimal digits and .ext is any single extension.
Configure it with a regex that parses <number> and <suffix> parts from
the end of <name>:

ExternalData_SERIES_PARSE = regex of the form (<number>)(<suffix>)$

For more complicated cases set:

ExternalData_SERIES_PARSE = regex with at least two () groups
ExternalData_SERIES_PARSE_PREFIX = <prefix> regex group number, if any
ExternalData_SERIES_PARSE_NUMBER = <number> regex group number
ExternalData_SERIES_PARSE_SUFFIX = <suffix> regex group number

Configure series number matching with a regex that matches the <number>
part of series members named <prefix><number><suffix>:

ExternalData_SERIES_MATCH = regex matching <number> in all series members

Note that the <suffix> of a series does not include a hash-algorithm
extension.

Referencing Associated Files
The DATA{} syntax can alternatively match files associated with the
named file and contained in the same directory. Associated files may
be specified by options using the syntax
DATA{<name>,<opt1>,<opt2>,...}. Each option may specify one file by
name or specify a regular expression to match file names using the
syntax REGEX:<regex>. For example, the arguments:

DATA{MyData/MyInput.mhd,MyInput.img} # File pair
DATA{MyData/MyFrames00.png,REGEX:MyFrames[0-9]+\\.png} # Series

will pass MyInput.mha and MyFrames00.png on the command line but ensure
that the associated files are present next to them.

Referencing Directories
The DATA{} syntax may reference a directory using a trailing slash and
a list of associated files. The form DATA{<name>/,<opt1>,<opt2>,...}
adds rules to fetch any files in the directory that match one of the
associated file options. For example, the argument
DATA{MyDataDir/,REGEX:.*} will pass the full path to a MyDataDir
directory on the command line and ensure that the directory contains
files corresponding to every file or content link in the MyDataDir
source directory.

Added in version 3.3: In order to match associated files in
subdirectories, specify a RECURSE: option, e.g.
DATA{MyDataDir/,RECURSE:,REGEX:.*}.

Hash Algorithms
The following hash algorithms are supported:

%(algo) <ext> Description
------- ----- -----------
MD5 .md5 Message-Digest Algorithm 5, RFC 1321
SHA1 .sha1 US Secure Hash Algorithm 1, RFC 3174
SHA224 .sha224 US Secure Hash Algorithms, RFC 4634
SHA256 .sha256 US Secure Hash Algorithms, RFC 4634
SHA384 .sha384 US Secure Hash Algorithms, RFC 4634
SHA512 .sha512 US Secure Hash Algorithms, RFC 4634
SHA3_224 .sha3-224 Keccak SHA-3
SHA3_256 .sha3-256 Keccak SHA-3
SHA3_384 .sha3-384 Keccak SHA-3
SHA3_512 .sha3-512 Keccak SHA-3

Added in version 3.8: Added the SHA3_* hash algorithms.

Note that the hashes are used only for unique data identification and
download verification.

Custom Fetch Scripts
Added in version 3.2.

When a data file must be fetched from one of the URL templates
specified in the ExternalData_URL_TEMPLATES variable, it is normally
downloaded using the file(DOWNLOAD) command. One may specify usage of
a custom fetch script by using a URL template of the form
ExternalDataCustomScript://<key>/<loc>. The <key> must be a C
identifier, and the <loc> must contain the %(algo) and %(hash)
placeholders. A variable corresponding to the key,
ExternalData_CUSTOM_SCRIPT_<key>, must be set to the full path to a
.cmake script file. The script will be included to perform the actual
fetch, and provided with the following variables:

ExternalData_CUSTOM_LOCATION
When a custom fetch script is loaded, this variable is set to
the location part of the URL, which will contain the substituted
hash algorithm name and content hash value.

ExternalData_CUSTOM_FILE
When a custom fetch script is loaded, this variable is set to
the full path to a file in which the script must store the
fetched content. The name of the file is unspecified and should
not be interpreted in any way.

The custom fetch script is expected to store fetched content in the
file or set a variable:

ExternalData_CUSTOM_ERROR
When a custom fetch script fails to fetch the requested content,
it must set this variable to a short one-line message describing
the reason for failure.

ExternalProject
External Project Definition

ExternalProject_Add
The ExternalProject_Add() function creates a custom target to
drive download, update/patch, configure, build, install and test
steps of an external project:

ExternalProject_Add(<name> [<option>...])

The individual steps within the process can be driven
independently if required (e.g. for CDash submission) and extra
custom steps can be defined, along with the ability to control
the step dependencies. The directory structure used for the
management of the external project can also be customized. The
function supports a large number of options which can be used to
tailor the external project behavior.

Directory Options
Most of the time, the default directory layout is sufficient. It is
largely an implementation detail that the main project usually doesn't
need to change. In some circumstances, however, control over the
directory layout can be useful or necessary. The directory options are
potentially more useful from the point of view that the main build can
use the ExternalProject_Get_Property() command to retrieve their
values, thereby allowing the main project to refer to build artifacts
of the external project.

PREFIX <dir>
Root directory for the external project. Unless otherwise noted
below, all other directories associated with the external
project will be created under here.

TMP_DIR <dir>
Directory in which to store temporary files.

STAMP_DIR <dir>
Directory in which to store the timestamps of each step. Log
files from individual steps are also created in here unless
overridden by LOG_DIR (see Logging Options below).

LOG_DIR <dir>
Added in version 3.14.

Directory in which to store the logs of each step.

DOWNLOAD_DIR <dir>
Directory in which to store downloaded files before unpacking
them. This directory is only used by the URL download method,
all other download methods use SOURCE_DIR directly instead.

SOURCE_DIR <dir>
Source directory into which downloaded contents will be
unpacked, or for non-URL download methods, the directory in
which the repository should be checked out, cloned, etc. If no
download method is specified, this must point to an existing
directory where the external project has already been unpacked
or cloned/checked out.

NOTE:
If a download method is specified, any existing contents of
the source directory may be deleted. Only the URL download
method checks whether this directory is either missing or
empty before initiating the download, stopping with an error
if it is not empty. All other download methods silently
discard any previous contents of the source directory.

BINARY_DIR <dir>
Specify the build directory location. This option is ignored if
BUILD_IN_SOURCE is enabled.

INSTALL_DIR <dir>
Installation prefix to be placed in the <INSTALL_DIR>
placeholder. This does not actually configure the external
project to install to the given prefix. That must be done by
passing appropriate arguments to the external project
configuration step, e.g. using <INSTALL_DIR>.

If any of the above ..._DIR options are not specified, their defaults
are computed as follows. If the PREFIX option is given or the EP_PREFIX
directory property is set, then an external project is built and
installed under the specified prefix:

TMP_DIR = <prefix>/tmp
STAMP_DIR = <prefix>/src/<name>-stamp
DOWNLOAD_DIR = <prefix>/src
SOURCE_DIR = <prefix>/src/<name>
BINARY_DIR = <prefix>/src/<name>-build
INSTALL_DIR = <prefix>
LOG_DIR = <STAMP_DIR>

Otherwise, if the EP_BASE directory property is set then components of
an external project are stored under the specified base:

TMP_DIR = <base>/tmp/<name>
STAMP_DIR = <base>/Stamp/<name>
DOWNLOAD_DIR = <base>/Download/<name>
SOURCE_DIR = <base>/Source/<name>
BINARY_DIR = <base>/Build/<name>
INSTALL_DIR = <base>/Install/<name>
LOG_DIR = <STAMP_DIR>

If no PREFIX, EP_PREFIX, or EP_BASE is specified, then the default is
to set PREFIX to <name>-prefix. Relative paths are interpreted with
respect to CMAKE_CURRENT_BINARY_DIR at the point where
ExternalProject_Add() is called.

Download Step Options
A download method can be omitted if the SOURCE_DIR option is used to
point to an existing non-empty directory. Otherwise, one of the
download methods below must be specified (multiple download methods
should not be given) or a custom DOWNLOAD_COMMAND provided.

DOWNLOAD_COMMAND <cmd>...
Overrides the command used for the download step (generator
expressions are supported). If this option is specified, all
other download options will be ignored. Providing an empty
string for <cmd> effectively disables the download step.

URL

URL <url1> [<url2>...]
List of paths and/or URL(s) of the external project's source.
When more than one URL is given, they are tried in turn until
one succeeds. A URL may be an ordinary path in the local file
system (in which case it must be the only URL provided) or any
downloadable URL supported by the file(DOWNLOAD) command. A
local filesystem path may refer to either an existing directory
or to an archive file, whereas a URL is expected to point to a
file which can be treated as an archive. When an archive is
used, it will be unpacked automatically unless the
DOWNLOAD_NO_EXTRACT option is set to prevent it. The archive
type is determined by inspecting the actual content rather than
using logic based on the file extension.

Changed in version 3.7: Multiple URLs are allowed.

URL_HASH <algo>=<hashValue>
Hash of the archive file to be downloaded. The argument should
be of the form <algo>=<hashValue> where algo can be any of the
hashing algorithms supported by the file() command. Specifying
this option is strongly recommended for URL downloads, as it
ensures the integrity of the downloaded content. It is also used
as a check for a previously downloaded file, allowing connection
to the remote location to be avoided altogether if the local
directory already has a file from an earlier download that
matches the specified hash.

URL_MD5 <md5>
Equivalent to URL_HASH MD5=<md5>.

DOWNLOAD_NAME <fname>
File name to use for the downloaded file. If not given, the end
of the URL is used to determine the file name. This option is
rarely needed, the default name is generally suitable and is not
normally used outside of code internal to the ExternalProject
module.

DOWNLOAD_EXTRACT_TIMESTAMP <bool>
Added in version 3.24.

When specified with a true value, the timestamps of the
extracted files will match those in the archive. When false, the
timestamps of the extracted files will reflect the time at which
the extraction was performed. If the download URL changes,
timestamps based off those in the archive can result in
dependent targets not being rebuilt when they potentially should
have been. Therefore, unless the file timestamps are significant
to the project in some way, use a false value for this option.
If DOWNLOAD_EXTRACT_TIMESTAMP is not given, the default is
false. See policy CMP0135.

DOWNLOAD_NO_EXTRACT <bool>
Added in version 3.6.

Allows the extraction part of the download step to be disabled
by passing a boolean true value for this option. If this option
is not given, the downloaded contents will be unpacked
automatically if required. If extraction has been disabled, the
full path to the downloaded file is available as
<DOWNLOADED_FILE> in subsequent steps or as the property
DOWNLOADED_FILE with the ExternalProject_Get_Property() command.

DOWNLOAD_NO_PROGRESS <bool>
Can be used to disable logging the download progress. If this
option is not given, download progress messages will be logged.

TIMEOUT <seconds>
Maximum time allowed for file download operations.

INACTIVITY_TIMEOUT <seconds>
Added in version 3.19.

Terminate the operation after a period of inactivity.

HTTP_USERNAME <username>
Added in version 3.7.

Username for the download operation if authentication is
required.

HTTP_PASSWORD <password>
Added in version 3.7.

Password for the download operation if authentication is
required.

HTTP_HEADER <header1> [<header2>...]
Added in version 3.7.

Provides an arbitrary list of HTTP headers for the download
operation. This can be useful for accessing content in systems
like AWS, etc.

TLS_VERSION <min>
Added in version 3.30.

Specify minimum TLS version for https:// URLs. If this option
is not provided, the value of the CMAKE_TLS_VERSION variable or
the CMAKE_TLS_VERSION environment variable will be used instead
(see file(DOWNLOAD)).

This option also applies to git clone invocations, although the
default behavior is different. If none of the TLS_VERSION
option, CMAKE_TLS_VERSION variable, or CMAKE_TLS_VERSION
environment variable is specified, the behavior will be
determined by git's default or a http.sslVersion git config
option the user may have set at a global level.

TLS_VERIFY <bool>
Specifies whether certificate verification should be performed
for https:// URLs. If this option is not provided, the value of
the CMAKE_TLS_VERIFY variable or the CMAKE_TLS_VERIFY
environment variable will be used instead (see file(DOWNLOAD)).
If neither of those is set, certificate verification will not be
performed. In situations where URL_HASH cannot be provided,
this option can be an alternative verification measure.

This option also applies to git clone invocations, although the
default behavior is different. If none of the TLS_VERIFY
option, CMAKE_TLS_VERIFY variable, or CMAKE_TLS_VERIFY
environment variable is specified, the behavior will be
determined by git's default (true) or a http.sslVerify git
config option the user may have set at a global level.

Changed in version 3.6: Previously this option did not apply to
git clone invocations.

Changed in version 3.30: Previously the CMAKE_TLS_VERIFY
environment variable was not checked.

TLS_CAINFO <file>
Specify a custom certificate authority file to use if TLS_VERIFY
is enabled. If this option is not specified, the value of the
CMAKE_TLS_CAINFO variable will be used instead (see
file(DOWNLOAD))

NETRC <level>
Added in version 3.11.

Specify whether the .netrc file is to be used for operation. If
this option is not specified, the value of the CMAKE_NETRC
variable will be used instead (see file(DOWNLOAD)). Valid
levels are:

IGNORED
The .netrc file is ignored. This is the default.

OPTIONAL
The .netrc file is optional, and information in the URL
is preferred. The file will be scanned to find which
ever information is not specified in the URL.

REQUIRED
The .netrc file is required, and information in the URL
is ignored.

NETRC_FILE <file>
Added in version 3.11.

Specify an alternative .netrc file to the one in your home
directory if the NETRC level is OPTIONAL or REQUIRED. If this
option is not specified, the value of the CMAKE_NETRC_FILE
variable will be used instead (see file(DOWNLOAD))

Added in version 3.1: Added support for tbz2, .tar.xz, .txz, and .7z
extensions.

Git
NOTE: A git version of 1.6.5 or later is required if this download
method is used.

GIT_REPOSITORY <url>
URL of the git repository. Any URL understood by the git command
may be used.

Changed in version 3.27: A relative URL will be resolved based
on the parent project's remote, subject to CMP0150. See the
policy documentation for how the remote is selected, including
conditions where the remote selection can fail. Local
filesystem remotes should always use absolute paths.

GIT_TAG <tag>
Git branch name, tag or commit hash. Note that branch names and
tags should generally be specified as remote names (i.e.
origin/myBranch rather than simply myBranch). This ensures that
if the remote end has its tag moved or branch rebased or history
rewritten, the local clone will still be updated correctly. In
general, however, specifying a commit hash should be preferred
for a number of reasons:

o If the local clone already has the commit corresponding to the
hash, no git fetch needs to be performed to check for changes
each time CMake is re-run. This can result in a significant
speed up if many external projects are being used.

o Using a specific git hash ensures that the main project's own
history is fully traceable to a specific point in the external
project's evolution. If a branch or tag name is used instead,
then checking out a specific commit of the main project
doesn't necessarily pin the whole build to a specific point in
the life of the external project. The lack of such
deterministic behavior makes the main project lose
traceability and repeatability.

If GIT_SHALLOW is enabled then GIT_TAG works only with branch
names and tags. A commit hash is not allowed.

Note that if not provided, GIT_TAG defaults to master, not the
default Git branch name.

GIT_REMOTE_NAME <name>
The optional name of the remote. If this option is not
specified, it defaults to origin.

GIT_SUBMODULES <module>...
Specific git submodules that should also be updated. If this
option is not provided, all git submodules will be updated.

Changed in version 3.16: When CMP0097 is set to NEW, if this
value is set to an empty string then no submodules are
initialized or updated.

GIT_SUBMODULES_RECURSE <bool>
Added in version 3.17.

Specify whether git submodules (if any) should update
recursively by passing the --recursive flag to git submodule
update. If not specified, the default is on.

GIT_SHALLOW <bool>
Added in version 3.6.

When this option is enabled, the git clone operation will be
given the --depth 1 option. This performs a shallow clone, which
avoids downloading the whole history and instead retrieves just
the commit denoted by the GIT_TAG option.

GIT_PROGRESS <bool>
Added in version 3.8.

When enabled, this option instructs the git clone operation to
report its progress by passing it the --progress option. Without
this option, the clone step for large projects may appear to
make the build stall, since nothing will be logged until the
clone operation finishes. While this option can be used to
provide progress to prevent the appearance of the build having
stalled, it may also make the build overly noisy if lots of
external projects are used.

GIT_CONFIG <option1> [<option2>...]
Added in version 3.8.

Specify a list of config options to pass to git clone. Each
option listed will be transformed into its own --config <option>
on the git clone command line, with each option required to be
in the form key=value.

GIT_REMOTE_UPDATE_STRATEGY <strategy>
Added in version 3.18.

When GIT_TAG refers to a remote branch, this option can be used
to specify how the update step behaves. The <strategy> must be
one of the following:

CHECKOUT
Ignore the local branch and always checkout the branch
specified by GIT_TAG.

REBASE Try to rebase the current branch to the one specified by
GIT_TAG. If there are local uncommitted changes, they
will be stashed first and popped again after rebasing.
If rebasing or popping stashed changes fail, abort the
rebase and halt with an error. When
GIT_REMOTE_UPDATE_STRATEGY is not present, this is the
default strategy unless the default has been overridden
with CMAKE_EP_GIT_REMOTE_UPDATE_STRATEGY (see below).
Note that if the branch specified in GIT_TAG is different
to the upstream branch currently being tracked, it is not
safe to perform a rebase. In that situation, REBASE will
silently be treated as CHECKOUT instead.

REBASE_CHECKOUT
Same as REBASE except if the rebase fails, an annotated
tag will be created at the original HEAD position from
before the rebase and then checkout GIT_TAG just like the
CHECKOUT strategy. The message stored on the annotated
tag will give information about what was attempted and
the tag name will include a timestamp so that each failed
run will add a new tag. This strategy ensures no changes
will be lost, but updates should always succeed if
GIT_TAG refers to a valid ref unless there are
uncommitted changes that cannot be popped successfully.

The variable CMAKE_EP_GIT_REMOTE_UPDATE_STRATEGY can be set to
override the default strategy. This variable should not be set
by a project, it is intended for the user to set. It is
primarily intended for use in continuous integration scripts to
ensure that when history is rewritten on a remote branch, the
build doesn't end up with unintended changes or failed builds
resulting from conflicts during rebase operations.

Subversion

SVN_REPOSITORY <url>
URL of the Subversion repository.

SVN_REVISION -r<rev>
Revision to checkout from the Subversion repository.

SVN_USERNAME <username>
Username for the Subversion checkout and update.

SVN_PASSWORD <password>
Password for the Subversion checkout and update.

SVN_TRUST_CERT <bool>
Specifies whether to trust the Subversion server site
certificate. If enabled, the --trust-server-cert option is
passed to the svn checkout and update commands.

Mercurial

HG_REPOSITORY <url>
URL of the mercurial repository.

HG_TAG <tag>
Mercurial branch name, tag or commit id.

CVS

CVS_REPOSITORY <cvsroot>
CVSROOT of the CVS repository.

CVS_MODULE <mod>
Module to checkout from the CVS repository.

CVS_TAG <tag>
Tag to checkout from the CVS repository.

Update Step Options
Whenever CMake is re-run, by default the external project's sources
will be updated if the download method supports updates (e.g. a git
repository would be checked if the GIT_TAG does not refer to a specific
commit).

UPDATE_COMMAND <cmd>...
Overrides the download method's update step with a custom
command. The command may use generator expressions.

UPDATE_DISCONNECTED <bool>
Added in version 3.2.

When enabled, this option causes the update step to be skipped
(but see below for changed behavior where this is not the case).
It does not prevent the download step. The update step can still
be added as a step target (see
ExternalProject_Add_StepTargets()) and called manually. This is
useful if you want to allow developers to build the project when
disconnected from the network (the network may still be needed
for the download step though).

Changed in version 3.27: When UPDATE_DISCONNECTED is true, the
update step will be executed if any details about the update or
download step are changed. Furthermore, if using the git
download/update method, the update logic will be modified to
skip attempts to contact the remote. If the GIT_TAG mentions a
ref that is not known locally, the update step will halt with a
fatal error.

When this option is present, it is generally advisable to make
the value a cache variable under the developer's control rather
than hard-coding it. If this option is not present, the default
value is taken from the EP_UPDATE_DISCONNECTED directory
property. If that is also not defined, updates are performed as
normal. The EP_UPDATE_DISCONNECTED directory property is
intended as a convenience for controlling the
UPDATE_DISCONNECTED behavior for an entire section of a
project's directory hierarchy and may be a more convenient
method of giving developers control over whether or not to
perform updates (assuming the project also provides a cache
variable or some other convenient method for setting the
directory property).

This may cause a step target to be created automatically for the
download step. See policy CMP0114.

Patch Step Options

PATCH_COMMAND <cmd>...
Specifies a custom command to patch the sources after an update.
By default, no patch command is defined. Note that it can be
quite difficult to define an appropriate patch command that
performs robustly, especially for download methods such as git
where changing the GIT_TAG will not discard changes from a
previous patch, but the patch command will be called again after
updating to the new tag.

Configure Step Options
The configure step is run after the download and update steps. By
default, the external project is assumed to be a CMake project, but
this can be overridden if required.

CONFIGURE_COMMAND <cmd>...
The default configure command runs CMake with a few options
based on the main project. The options added are typically only
those needed to use the same generator as the main project, but
the CMAKE_GENERATOR option can be given to override this. The
project is responsible for adding any toolchain details, flags
or other settings it wants to reuse from the main project or
otherwise specify (see CMAKE_ARGS, CMAKE_CACHE_ARGS and
CMAKE_CACHE_DEFAULT_ARGS below).

For non-CMake external projects, the CONFIGURE_COMMAND option
must be used to override the default configure command
(generator expressions are supported). For projects that require
no configure step, specify this option with an empty string as
the command to execute.

CMAKE_COMMAND /.../cmake
Specify an alternative cmake executable for the configure step
(use an absolute path). This is generally not recommended, since
it is usually desirable to use the same CMake version throughout
the whole build. This option is ignored if a custom configure
command has been specified with CONFIGURE_COMMAND.

CMAKE_GENERATOR <gen>
Override the CMake generator used for the configure step.
Without this option, the same generator as the main build will
be used. This option is ignored if a custom configure command
has been specified with the CONFIGURE_COMMAND option.

CMAKE_GENERATOR_PLATFORM <platform>
Added in version 3.1.

Pass a generator-specific platform name to the CMake command
(see CMAKE_GENERATOR_PLATFORM). It is an error to provide this
option without the CMAKE_GENERATOR option.

CMAKE_GENERATOR_TOOLSET <toolset>
Pass a generator-specific toolset name to the CMake command (see
CMAKE_GENERATOR_TOOLSET). It is an error to provide this option
without the CMAKE_GENERATOR option.

CMAKE_GENERATOR_INSTANCE <instance>
Added in version 3.11.

Pass a generator-specific instance selection to the CMake
command (see CMAKE_GENERATOR_INSTANCE). It is an error to
provide this option without the CMAKE_GENERATOR option.

CMAKE_ARGS <arg>...
The specified arguments are passed to the cmake command line.
They can be any argument the cmake command understands, not just
cache values defined by -D... arguments (see also CMake
Options).

Added in version 3.3: Arguments may use generator expressions.

CMAKE_CACHE_ARGS <arg>...
This is an alternate way of specifying cache variables where
command line length issues may become a problem. The arguments
are expected to be in the form -Dvar:STRING=value, which are
then transformed into CMake set() commands with the FORCE option
used. These set() commands are written to a pre-load script
which is then applied using the cmake -C command line option.

Added in version 3.3: Arguments may use generator expressions.

CMAKE_CACHE_DEFAULT_ARGS <arg>...
Added in version 3.2.

This is the same as the CMAKE_CACHE_ARGS option except the set()
commands do not include the FORCE keyword. This means the values
act as initial defaults only and will not override any variables
already set from a previous run. Use this option with care, as
it can lead to different behavior depending on whether the build
starts from a fresh build directory or reuses previous build
contents.

Added in version 3.15: If the CMake generator is the Green Hills
MULTI and not overridden, the original project's settings for
the GHS toolset and target system customization cache variables
are propagated into the external project.

SOURCE_SUBDIR <dir>
Added in version 3.7.

When no CONFIGURE_COMMAND option is specified, the configure
step assumes the external project has a CMakeLists.txt file at
the top of its source tree (i.e. in SOURCE_DIR). The
SOURCE_SUBDIR option can be used to point to an alternative
directory within the source tree to use as the top of the CMake
source tree instead. This must be a relative path and it will be
interpreted as being relative to SOURCE_DIR.

Added in version 3.14: When BUILD_IN_SOURCE option is enabled,
the BUILD_COMMAND is used to point to an alternative directory
within the source tree.

CONFIGURE_HANDLED_BY_BUILD <bool>
Added in version 3.20.

Enabling this option relaxes the dependencies of the configure
step on other external projects to order-only. This means the
configure step will be executed after its external project
dependencies are built but it will not be marked dirty when one
of its external project dependencies is rebuilt. This option can
be enabled when the build step is smart enough to figure out if
the configure step needs to be rerun. CMake and Meson are
examples of build systems whose build step is smart enough to
know if the configure step needs to be rerun.

Build Step Options
If the configure step assumed the external project uses CMake as its
build system, the build step will also. Otherwise, the build step will
assume a Makefile-based build and simply run make with no arguments as
the default build step. This can be overridden with custom build
commands if required.

If both the main project and the external project use make as their
build tool, the build step of the external project is invoked as a
recursive make using $(MAKE). This will communicate some build tool
settings from the main project to the external project. If either the
main project or external project is not using make, no build tool
settings will be passed to the external project other than those
established by the configure step (i.e. running ninja -v in the main
project will not pass -v to the external project's build step, even if
it also uses ninja as its build tool).

BUILD_COMMAND <cmd>...
Overrides the default build command (generator expressions are
supported). If this option is not given, the default build
command will be chosen to integrate with the main build in the
most appropriate way (e.g. using recursive make for Makefile
generators or cmake --build if the project uses a CMake build).
This option can be specified with an empty string as the command
to make the build step do nothing.

BUILD_IN_SOURCE <bool>
When this option is enabled, the build will be done directly
within the external project's source tree. This should generally
be avoided, the use of a separate build directory is usually
preferred, but it can be useful when the external project
assumes an in-source build. The BINARY_DIR option should not be
specified if building in-source.

BUILD_ALWAYS <bool>
Enabling this option forces the build step to always be run.
This can be the easiest way to robustly ensure that the external
project's own build dependencies are evaluated rather than
relying on the default success timestamp-based method. This
option is not normally needed unless developers are expected to
modify something the external project's build depends on in a
way that is not detectable via the step target dependencies
(e.g. SOURCE_DIR is used without a download method and
developers might modify the sources in SOURCE_DIR).

BUILD_BYPRODUCTS <file>...
Added in version 3.2.

Specifies files that will be generated by the build command but
which might or might not have their modification time updated by
subsequent builds. This may also be required to explicitly
declare dependencies when using the Ninja generator. These
ultimately get passed through as BYPRODUCTS to the build step's
own underlying call to add_custom_command(), which has
additional documentation.

BUILD_JOB_SERVER_AWARE <bool>
Added in version 3.28.

Specifies that the build step is aware of the GNU Make job
server. See the add_custom_command() documentation of its
JOB_SERVER_AWARE option for details. This option is relevant
only when an explicit BUILD_COMMAND is specified.

Install Step Options
If the configure step assumed the external project uses CMake as its
build system, the install step will also. Otherwise, the install step
will assume a Makefile-based build and simply run make install as the
default build step. This can be overridden with custom install commands
if required.

INSTALL_COMMAND <cmd>...
The external project's own install step is invoked as part of
the main project's build. It is done after the external
project's build step and may be before or after the external
project's test step (see the TEST_BEFORE_INSTALL option below).
The external project's install rules are not part of the main
project's install rules, so if anything from the external
project should be installed as part of the main build, these
need to be specified in the main build as additional install()
commands. The default install step builds the install target of
the external project, but this can be overridden with a custom
command using this option (generator expressions are supported).
Passing an empty string as the <cmd> makes the install step do
nothing.

INSTALL_BYPRODUCTS <file>...
Added in version 3.26.

Specifies files that will be generated by the install command
but which might or might not have their modification time
updated by subsequent installs. This may also be required to
explicitly declare dependencies when using the Ninja generator.
These ultimately get passed through as BYPRODUCTS to the install
step's own underlying call to add_custom_command(), which has
additional documentation.

NOTE:
If the CMAKE_INSTALL_MODE environment variable is set when the main
project is built, it will only have an effect if the following
conditions are met:

o The main project's configure step assumed the external project
uses CMake as its build system.

o The external project's install command actually runs. Note that
due to the way ExternalProject may use timestamps internally, if
nothing the install step depends on needs to be re-executed, the
install command might also not need to run.

Note also that ExternalProject does not check whether the
CMAKE_INSTALL_MODE environment variable changes from one run to
another.

Test Step Options
The test step is only defined if at least one of the following TEST_...
options are provided.

TEST_COMMAND <cmd>...
Overrides the default test command (generator expressions are
supported). If this option is not given, the default behavior of
the test step is to build the external project's own test
target. This option can be specified with <cmd> as an empty
string, which allows the test step to still be defined, but it
will do nothing. Do not specify any of the other TEST_...
options if providing an empty string as the test command, but
prefer to omit all TEST_... options altogether if the test step
target is not needed.

TEST_BEFORE_INSTALL <bool>
When this option is enabled, the test step will be executed
before the install step. The default behavior is for the test
step to run after the install step.

TEST_AFTER_INSTALL <bool>
This option is mainly useful as a way to indicate that the test
step is desired but all default behavior is sufficient.
Specifying this option with a boolean true value ensures the
test step is defined and that it comes after the install step.
If both TEST_BEFORE_INSTALL and TEST_AFTER_INSTALL are enabled,
the latter is silently ignored.

TEST_EXCLUDE_FROM_MAIN <bool>
Added in version 3.2.

If enabled, the main build's default ALL target will not depend
on the test step. This can be a useful way of ensuring the test
step is defined but only gets invoked when manually requested.
This may cause a step target to be created automatically for
either the install or build step. See policy CMP0114.

Output Logging Options
Each of the following LOG_... options can be used to wrap the relevant
step in a script to capture its output to files. The log files will be
created in LOG_DIR if supplied or otherwise the STAMP_DIR directory
with step-specific file names.

LOG_DOWNLOAD <bool>
When enabled, the output of the download step is logged to
files.

LOG_UPDATE <bool>
When enabled, the output of the update step is logged to files.

LOG_PATCH <bool>
Added in version 3.14.

When enabled, the output of the patch step is logged to files.

LOG_CONFIGURE <bool>
When enabled, the output of the configure step is logged to
files.

LOG_BUILD <bool>
When enabled, the output of the build step is logged to files.

LOG_INSTALL <bool>
When enabled, the output of the install step is logged to files.

LOG_TEST <bool>
When enabled, the output of the test step is logged to files.

LOG_MERGED_STDOUTERR <bool>
Added in version 3.14.

When enabled, stdout and stderr will be merged for any step
whose output is being logged to files.

LOG_OUTPUT_ON_FAILURE <bool>
Added in version 3.14.

This option only has an effect if at least one of the other
LOG_<step> options is enabled. If an error occurs for a step
which has logging to file enabled, that step's output will be
printed to the console if LOG_OUTPUT_ON_FAILURE is set to true.
For cases where a large amount of output is recorded, just the
end of that output may be printed to the console.

Terminal Access Options
Added in version 3.4.

Steps can be given direct access to the terminal in some cases. Giving
a step access to the terminal may allow it to receive terminal input if
required, such as for authentication details not provided by other
options. With the Ninja generator, these options place the steps in
the console job pool. Each step can be given access to the terminal
individually via the following options:

USES_TERMINAL_DOWNLOAD <bool>
Give the download step access to the terminal.

USES_TERMINAL_UPDATE <bool>
Give the update step access to the terminal.

USES_TERMINAL_PATCH <bool>
Added in version 3.23.

Give the patch step access to the terminal.

USES_TERMINAL_CONFIGURE <bool>
Give the configure step access to the terminal.

USES_TERMINAL_BUILD <bool>
Give the build step access to the terminal.

USES_TERMINAL_INSTALL <bool>
Give the install step access to the terminal.

USES_TERMINAL_TEST <bool>
Give the test step access to the terminal.

Target Options

DEPENDS <targets>...
Specify other targets on which the external project depends. The
other targets will be brought up to date before any of the
external project's steps are executed. Because the external
project uses additional custom targets internally for each step,
the DEPENDS option is the most convenient way to ensure all of
those steps depend on the other targets. Simply doing
add_dependencies(<name> <targets>) will not make any of the
steps dependent on <targets>.

EXCLUDE_FROM_ALL <bool>
When enabled, this option excludes the external project from the
default ALL target of the main build.

STEP_TARGETS <step-target>...
Generate custom targets for the specified steps. This is
required if the steps need to be triggered manually or if they
need to be used as dependencies of other targets. If this option
is not specified, the default value is taken from the
EP_STEP_TARGETS directory property. See
ExternalProject_Add_StepTargets() below for further discussion
of the effects of this option.

INDEPENDENT_STEP_TARGETS <step-target>...
Deprecated since version 3.19: This is allowed only if policy
CMP0114 is not set to NEW.

Generates custom targets for the specified steps and prevent
these targets from having the usual dependencies applied to
them. If this option is not specified, the default value is
taken from the EP_INDEPENDENT_STEP_TARGETS directory property.
This option is mostly useful for allowing individual steps to be
driven independently, such as for a CDash setup where each step
should be initiated and reported individually rather than as one
whole build. See ExternalProject_Add_StepTargets() below for
further discussion of the effects of this option.

Miscellaneous Options

LIST_SEPARATOR <sep>
For any of the various ..._COMMAND options, and CMAKE_ARGS,
ExternalProject will replace <sep> with ; in the specified
command lines. This can be used to ensure a command has a
literal ; in it where direct usage would otherwise be
interpreted as argument separators to CMake APIs instead. Note
that the separator should be chosen to avoid being confused for
non-list-separator usages of the sequence. For example, using
LIST_SEPARATOR allows for passing list values to CMake cache
variables on the command line:

ExternalProject_Add(example
... # Download options, etc.
LIST_SEPARATOR ","
CMAKE_ARGS "-DCMAKE_PREFIX_PATH:STRING=${first_prefix},${second_prefix}"
)

COMMAND <cmd>...
Any of the other ..._COMMAND options can have additional
commands appended to them by following them with as many COMMAND
... options as needed (generator expressions are supported). For
example:

ExternalProject_Add(example
... # Download options, etc.
BUILD_COMMAND ${CMAKE_COMMAND} -E echo "Starting $<CONFIG> build"
COMMAND ${CMAKE_COMMAND} --build <BINARY_DIR> --config $<CONFIG>
COMMAND ${CMAKE_COMMAND} -E echo "$<CONFIG> build complete"
)

It should also be noted that each build step is created via a call to
ExternalProject_Add_Step(). See that command's documentation for the
automatic substitutions that are supported for some options.

Obtaining Project Properties

ExternalProject_Get_Property
The ExternalProject_Get_Property() function retrieves external
project target properties:

ExternalProject_Get_Property(<name> <prop1> [<prop2>...])

The function stores property values in variables of the same
name. Property names correspond to the keyword argument names of
ExternalProject_Add(). For example, the source directory might
be retrieved like so:

ExternalProject_Get_property(myExtProj SOURCE_DIR)
message("Source dir of myExtProj = ${SOURCE_DIR}")

Explicit Step Management
The ExternalProject_Add() function on its own is often sufficient for
incorporating an external project into the main build. Certain
scenarios require additional work to implement desired behavior, such
as adding in a custom step or making steps available as manually
triggerable targets. The ExternalProject_Add_Step(),
ExternalProject_Add_StepTargets() and
ExternalProject_Add_StepDependencies functions provide the lower level
control needed to implement such step-level capabilities.

ExternalProject_Add_Step
The ExternalProject_Add_Step() function specifies an additional
custom step for an external project defined by an earlier call
to ExternalProject_Add():

ExternalProject_Add_Step(<name> <step> [<option>...])

<name> is the same as the name passed to the original call to
ExternalProject_Add(). The specified <step> must not be one of
the pre-defined steps (mkdir, download, update, patch,
configure, build, install or test). The supported options are:

COMMAND <cmd>...
The command line to be executed by this custom step
(generator expressions are supported). This option can be
repeated multiple times to specify multiple commands to
be executed in order.

COMMENT "<text>..."
Text to be printed when the custom step executes.

DEPENDEES <step>...
Other steps (custom or pre-defined) on which this step
depends.

DEPENDERS <step>...
Other steps (custom or pre-defined) that depend on this
new custom step.

DEPENDS <file>...
Files on which this custom step depends.

INDEPENDENT <bool>
Added in version 3.19.

Specifies whether this step is independent of the
external dependencies specified by the
ExternalProject_Add()'s DEPENDS option. The default is
FALSE. Steps marked as independent may depend only on
other steps marked independent. See policy CMP0114.

Note that this use of the term "independent" refers only
to independence from external targets specified by the
DEPENDS option and is orthogonal to a step's dependencies
on other steps.

If a step target is created for an independent step by
the ExternalProject_Add() STEP_TARGETS option or by the
ExternalProject_Add_StepTargets() function, it will not
depend on the external targets, but may depend on targets
for other steps.

BYPRODUCTS <file>...
Added in version 3.2.

Files that will be generated by this custom step but
which might or might not have their modification time
updated by subsequent builds. This may also be required
to explicitly declare dependencies when using the Ninja
generator. This list of files will ultimately be passed
through as the BYPRODUCTS option to the
add_custom_command() used to implement the custom step
internally, which has additional documentation.

ALWAYS <bool>
When enabled, this option specifies that the custom step
should always be run (i.e. that it is always considered
out of date).

JOB_SERVER_AWARE <bool>
Added in version 3.28.

Specifies that the custom step is aware of the GNU Make
job server. See the add_custom_command() documentation
of its JOB_SERVER_AWARE option for details.

EXCLUDE_FROM_MAIN <bool>
When enabled, this option specifies that the external
project's main target does not depend on the custom step.
This may cause step targets to be created automatically
for the steps on which this step depends. See policy
CMP0114.

WORKING_DIRECTORY <dir>
Specifies the working directory to set before running the
custom step's command. If this option is not specified,
the directory will be the value of the
CMAKE_CURRENT_BINARY_DIR at the point where
ExternalProject_Add_Step() was called.

LOG <bool>
If set, this causes the output from the custom step to be
captured to files in the external project's LOG_DIR if
supplied or STAMP_DIR.

USES_TERMINAL <bool>
If enabled, this gives the custom step direct access to
the terminal if possible.

The command line, comment, working directory and byproducts of
every standard and custom step are processed to replace the
tokens <SOURCE_DIR>, <SOURCE_SUBDIR>, <BINARY_DIR>,
<INSTALL_DIR> <TMP_DIR>, <DOWNLOAD_DIR> and <DOWNLOADED_FILE>
with their corresponding property values defined in the original
call to ExternalProject_Add().

Added in version 3.3: Token replacement is extended to
byproducts.

Added in version 3.11: The <DOWNLOAD_DIR> substitution token.

ExternalProject_Add_StepTargets
The ExternalProject_Add_StepTargets() function generates targets
for the steps listed. The name of each created target will be of
the form <name>-<step>:

ExternalProject_Add_StepTargets(<name> <step1> [<step2>...])

Creating a target for a step allows it to be used as a
dependency of another target or to be triggered manually. Having
targets for specific steps also allows them to be driven
independently of each other by specifying targets on build
command lines. For example, you may be submitting to a
sub-project based dashboard where you want to drive the
configure portion of the build, then submit to the dashboard,
followed by the build portion, followed by tests. If you invoke
a custom target that depends on a step halfway through the step
dependency chain, then all the previous steps will also run to
ensure everything is up to date.

Internally, ExternalProject_Add() calls
ExternalProject_Add_Step() to create each step. If any
STEP_TARGETS were specified, then
ExternalProject_Add_StepTargets() will also be called after
ExternalProject_Add_Step(). Even if a step is not mentioned in
the STEP_TARGETS option, ExternalProject_Add_StepTargets() can
still be called later to manually define a target for the step.

The STEP_TARGETS option for ExternalProject_Add() is generally
the easiest way to ensure targets are created for specific steps
of interest. For custom steps,
ExternalProject_Add_StepTargets() must be called explicitly if a
target should also be created for that custom step. An
alternative to these two options is to populate the
EP_STEP_TARGETS directory property. It acts as a default for
the step target options and can save having to repeatedly
specify the same set of step targets when multiple external
projects are being defined.

Added in version 3.19: If CMP0114 is set to NEW, step targets
are fully responsible for holding the custom commands
implementing their steps. The primary target created by
ExternalProject_Add depends on the step targets, and the step
targets depend on each other. The target-level dependencies
match the file-level dependencies used by the custom commands
for each step. The targets for steps created with
ExternalProject_Add_Step()'s INDEPENDENT option do not depend on
the external targets specified by ExternalProject_Add()'s
DEPENDS option. The predefined steps mkdir, download, update,
and patch are independent.

If CMP0114 is not NEW, the following deprecated behavior is
available:

o A deprecated NO_DEPENDS option may be specified immediately
after the <name> and before the first step. If the NO_DEPENDS
option is specified, the step target will not depend on the
dependencies of the external project (i.e. on any dependencies
of the <name> custom target created by ExternalProject_Add()).
This is usually safe for the download, update and patch steps,
since they do not typically require that the dependencies are
updated and built. Using NO_DEPENDS for any of the other
pre-defined steps, however, may break parallel builds. Only
use NO_DEPENDS where it is certain that the named steps
genuinely do not have dependencies. For custom steps, consider
whether or not the custom commands require the dependencies to
be configured, built and installed.

o The INDEPENDENT_STEP_TARGETS option for ExternalProject_Add(),
or the EP_INDEPENDENT_STEP_TARGETS directory property, tells
the function to call ExternalProject_Add_StepTargets()
internally using the NO_DEPENDS option for the specified
steps.

ExternalProject_Add_StepDependencies
Added in version 3.2.

The ExternalProject_Add_StepDependencies() function can be used
to add dependencies to a step. The dependencies added must be
targets CMake already knows about (these can be ordinary
executable or library targets, custom targets or even step
targets of another external project):

ExternalProject_Add_StepDependencies(<name> <step> <target1> [<target2>...])

This function takes care to set both target and file level
dependencies and will ensure that parallel builds will not
break. It should be used instead of add_dependencies() whenever
adding a dependency for some of the step targets generated by
the ExternalProject module.

Examples
The following example shows how to download and build a hypothetical
project called FooBar from github:

include(ExternalProject)
ExternalProject_Add(foobar
GIT_REPOSITORY git@github.com:FooCo/FooBar.git
GIT_TAG origin/release/1.2.3
)

For the sake of the example, also define a second hypothetical external
project called SecretSauce, which is downloaded from a web server. Two
URLs are given to take advantage of a faster internal network if
available, with a fallback to a slower external server. The project is
a typical Makefile project with no configure step, so some of the
default commands are overridden. The build is only required to build
the sauce target:

find_program(MAKE_EXE NAMES gmake nmake make)
ExternalProject_Add(secretsauce
URL http://intranet.somecompany.com/artifacts/sauce-2.7.tgz
https://www.somecompany.com/downloads/sauce-2.7.zip
URL_HASH MD5=d41d8cd98f00b204e9800998ecf8427e
CONFIGURE_COMMAND ""
BUILD_COMMAND ${MAKE_EXE} sauce
)

Suppose the build step of secretsauce requires that foobar must already
be built. This could be enforced like so:

ExternalProject_Add_StepDependencies(secretsauce build foobar)

Another alternative would be to create a custom target for foobar's
build step and make secretsauce depend on that rather than the whole
foobar project. This would mean foobar only needs to be built, it
doesn't need to run its install or test steps before secretsauce can be
built. The dependency can also be defined along with the secretsauce
project:

ExternalProject_Add_StepTargets(foobar build)
ExternalProject_Add(secretsauce
URL http://intranet.somecompany.com/artifacts/sauce-2.7.tgz
https://www.somecompany.com/downloads/sauce-2.7.zip
URL_HASH MD5=d41d8cd98f00b204e9800998ecf8427e
CONFIGURE_COMMAND ""
BUILD_COMMAND ${MAKE_EXE} sauce
DEPENDS foobar-build
)

Instead of calling ExternalProject_Add_StepTargets(), the target could
be defined along with the foobar project itself:

ExternalProject_Add(foobar
GIT_REPOSITORY git@github.com:FooCo/FooBar.git
GIT_TAG origin/release/1.2.3
STEP_TARGETS build
)

If many external projects should have the same set of step targets,
setting a directory property may be more convenient. The build step
target could be created automatically by setting the EP_STEP_TARGETS
directory property before creating the external projects with
ExternalProject_Add():

set_property(DIRECTORY PROPERTY EP_STEP_TARGETS build)

Lastly, suppose that secretsauce provides a script called makedoc which
can be used to generate its own documentation. Further suppose that the
script expects the output directory to be provided as the only
parameter and that it should be run from the secretsauce source
directory. A custom step and a custom target to trigger the script can
be defined like so:

ExternalProject_Add_Step(secretsauce docs
COMMAND <SOURCE_DIR>/makedoc <BINARY_DIR>
WORKING_DIRECTORY <SOURCE_DIR>
COMMENT "Building secretsauce docs"
ALWAYS TRUE
EXCLUDE_FROM_MAIN TRUE
)
ExternalProject_Add_StepTargets(secretsauce docs)

The custom step could then be triggered from the main build like so:

cmake --build . --target secretsauce-docs

FeatureSummary
Functions for generating a summary of enabled/disabled features.

These functions can be used to generate a summary of enabled and
disabled packages and/or feature for a build tree such as:

-- The following OPTIONAL packages have been found:
LibXml2 (required version >= 2.4), XML processing lib, <http://xmlsoft.org>
* Enables HTML-import in MyWordProcessor
* Enables odt-export in MyWordProcessor
PNG, A PNG image library., <http://www.libpng.org/pub/png/>
* Enables saving screenshots
-- The following OPTIONAL packages have not been found:
Lua51, The Lua scripting language., <https://www.lua.org>
* Enables macros in MyWordProcessor
Foo, Foo provides cool stuff.

Global Properties

FeatureSummary_PKG_TYPES

The global property FeatureSummary_PKG_TYPES defines the type of
packages used by FeatureSummary.

The order in this list is important, the first package type in the list
is the least important, the last is the most important. the of a
package can only be changed to higher types.

The default package types are , RUNTIME, OPTIONAL, RECOMMENDED and
REQUIRED, and their importance is RUNTIME < OPTIONAL < RECOMMENDED <
REQUIRED.

FeatureSummary_REQUIRED_PKG_TYPES

The global property FeatureSummary_REQUIRED_PKG_TYPES defines which
package types are required.

If one or more package in this categories has not been found, CMake
will abort when calling feature_summary() with the
'FATAL_ON_MISSING_REQUIRED_PACKAGES' option enabled.

The default value for this global property is REQUIRED.

FeatureSummary_DEFAULT_PKG_TYPE

The global property FeatureSummary_DEFAULT_PKG_TYPE defines which
package type is the default one. When calling feature_summary(), if
the user did not set the package type explicitly, the package will be
assigned to this category.

This value must be one of the types defined in the
FeatureSummary_PKG_TYPES global property unless the package type is set
for all the packages.

The default value for this global property is OPTIONAL.

FeatureSummary_<TYPE>_DESCRIPTION

Added in version 3.9.

The global property FeatureSummary_<TYPE>_DESCRIPTION can be defined
for each type to replace the type name with the specified string
whenever the package type is used in an output string.

If not set, the string "<TYPE> packages" is used.

Functions

feature_summary

The feature_summary() macro can be used to print information
about enabled or disabled packages or features of a project. By
default, only the names of the features/packages will be printed
and their required version when one was specified. Use
set_package_properties() to add more useful information, like
e.g. a download URL for the respective package or their purpose
in the project.

The WHAT option is the only mandatory option. Here you specify
what information will be printed:

ALL print everything

ENABLED_FEATURES
the list of all features which are enabled

DISABLED_FEATURES
the list of all features which are disabled

PACKAGES_FOUND
the list of all packages which have been found

PACKAGES_NOT_FOUND
the list of all packages which have not been found

For each package type <TYPE> defined by the
FeatureSummary_PKG_TYPES global property, the following
information can also be used:

<TYPE>_PACKAGES_FOUND
only those packages which have been found which have the
type <TYPE>

<TYPE>_PACKAGES_NOT_FOUND
only those packages which have not been found which have
the type <TYPE>

Changed in version 3.1: With the exception of the ALL value,
these values can be combined in order to customize the output.
For example:

feature_summary(WHAT ENABLED_FEATURES DISABLED_FEATURES)

If a FILENAME is given, the information is printed into this
file. If APPEND is used, it is appended to this file, otherwise
the file is overwritten if it already existed. If the VAR
option is used, the information is "printed" into the specified
variable. If FILENAME is not used, the information is printed
to the terminal. Using the DESCRIPTION option a description or
headline can be set which will be printed above the actual
content. If only one type of package was requested, no title is
printed, unless it is explicitly set using either DESCRIPTION to
use a custom string, or DEFAULT_DESCRIPTION to use a default
title for the requested type. If INCLUDE_QUIET_PACKAGES is
given, packages which have been searched with find_package(...
QUIET) will also be listed. By default they are skipped. If
FATAL_ON_MISSING_REQUIRED_PACKAGES is given, CMake will abort if
a package which is marked as one of the package types listed in
the FeatureSummary_REQUIRED_PKG_TYPES global property has not
been found. The default value for the
FeatureSummary_REQUIRED_PKG_TYPES global property is REQUIRED.

Added in version 3.9: The DEFAULT_DESCRIPTION option.

The FeatureSummary_DEFAULT_PKG_TYPE global property can be
modified to change the default package type assigned when not
explicitly assigned by the user.

Added in version 3.8: If the QUIET_ON_EMPTY option is used, if
only one type of package was requested, and no packages
belonging to that category were found, then no output (including
the DESCRIPTION) is printed or added to the VAR variable.

Example 1, append everything to a file:

include(FeatureSummary)
feature_summary(WHAT ALL
FILENAME ${CMAKE_BINARY_DIR}/all.log APPEND)

Example 2, print the enabled features into the variable
enabledFeaturesText, including QUIET packages:

include(FeatureSummary)
feature_summary(WHAT ENABLED_FEATURES
INCLUDE_QUIET_PACKAGES
DESCRIPTION "Enabled Features:"
VAR enabledFeaturesText)
message(STATUS "${enabledFeaturesText}")

Example 3, change default package types and print only the
categories that are not empty:

include(FeatureSummary)
set_property(GLOBAL APPEND PROPERTY FeatureSummary_PKG_TYPES BUILD)
find_package(FOO)
set_package_properties(FOO PROPERTIES TYPE BUILD)
feature_summary(WHAT BUILD_PACKAGES_FOUND
Description "Build tools found:"
QUIET_ON_EMPTY)
feature_summary(WHAT BUILD_PACKAGES_NOT_FOUND
Description "Build tools not found:"
QUIET_ON_EMPTY)

set_package_properties

set_package_properties(<name> PROPERTIES
[ URL <url> ]
[ DESCRIPTION <description> ]
[ TYPE (RUNTIME|OPTIONAL|RECOMMENDED|REQUIRED) ]
[ PURPOSE <purpose> ]
)

Use this macro to set up information about the named package,
which can then be displayed via FEATURE_SUMMARY(). This can be
done either directly in the Find-module or in the project which
uses the module after the find_package() call. The features for
which information can be set are added automatically by the
find_package() command.

URL <url>
This should be the homepage of the package, or something
similar. Ideally this is set already directly in the
Find-module.

DESCRIPTION <description>
A short description what that package is, at most one
sentence. Ideally this is set already directly in the
Find-module.

TYPE <type>
What type of dependency has the using project on that
package. Default is OPTIONAL. In this case it is a
package which can be used by the project when available
at buildtime, but it also work without. RECOMMENDED is
similar to OPTIONAL, i.e. the project will build if the
package is not present, but the functionality of the
resulting binaries will be severely limited. If a
REQUIRED package is not available at buildtime, the
project may not even build. This can be combined with
the FATAL_ON_MISSING_REQUIRED_PACKAGES argument for
feature_summary(). Last, a RUNTIME package is a package
which is actually not used at all during the build, but
which is required for actually running the resulting
binaries. So if such a package is missing, the project
can still be built, but it may not work later on. If
set_package_properties() is called multiple times for the
same package with different TYPEs, the TYPE is only
changed to higher TYPEs (RUNTIME < OPTIONAL < RECOMMENDED
< REQUIRED), lower TYPEs are ignored. The TYPE property
is project-specific, so it cannot be set by the
Find-module, but must be set in the project. Type
accepted can be changed by setting the
FeatureSummary_PKG_TYPES global property.

PURPOSE <purpose>
This describes which features this package enables in the
project, i.e. it tells the user what functionality he
gets in the resulting binaries. If
set_package_properties() is called multiple times for a
package, all PURPOSE properties are appended to a list of
purposes of the package in the project. As the TYPE
property, also the PURPOSE property is project-specific,
so it cannot be set by the Find-module, but must be set
in the project.

Example for setting the info for a package:

find_package(LibXml2)
set_package_properties(LibXml2 PROPERTIES
DESCRIPTION "A XML processing library."
URL "http://xmlsoft.org/")
# or
set_package_properties(LibXml2 PROPERTIES
TYPE RECOMMENDED
PURPOSE "Enables HTML-import in MyWordProcessor")
# or
set_package_properties(LibXml2 PROPERTIES
TYPE OPTIONAL
PURPOSE "Enables odt-export in MyWordProcessor")

find_package(DBUS)
set_package_properties(DBUS PROPERTIES
TYPE RUNTIME
PURPOSE "Necessary to disable the screensaver during a presentation")

add_feature_info

add_feature_info(<name> <enabled> <description>)

Use this macro to add information about a feature with the given
<name>. <enabled> contains whether this feature is enabled or
not. It can be a variable or a list of conditions.
<description> is a text describing the feature. The information
can be displayed using feature_summary() for ENABLED_FEATURES
and DISABLED_FEATURES respectively.

Changed in version 3.8: <enabled> can be a list of conditions.

Example for setting the info for a feature:

option(WITH_FOO "Help for foo" ON)
add_feature_info(Foo WITH_FOO "The Foo feature provides very cool stuff.")

Legacy Macros
The following macros are provided for compatibility with previous CMake
versions:

set_package_info

set_package_info(<name> <description> [ <url> [<purpose>] ])

Use this macro to set up information about the named package,
which can then be displayed via feature_summary(). This can be
done either directly in the Find-module or in the project which
uses the module after the find_package() call. The features for
which information can be set are added automatically by the
find_package() command.

set_feature_info

set_feature_info(<name> <description> [<url>])

Does the same as:

set_package_info(<name> <description> <url>)

print_enabled_features

print_enabled_features()

Does the same as

feature_summary(WHAT ENABLED_FEATURES DESCRIPTION "Enabled features:")

print_disabled_features

print_disabled_features()

Does the same as

feature_summary(WHAT DISABLED_FEATURES DESCRIPTION "Disabled features:")

FetchContent
Added in version 3.11.

NOTE:
The Using Dependencies Guide provides a high-level introduction to
this general topic. It provides a broader overview of where the
FetchContent module fits into the bigger picture, including its
relationship to the find_package() command. The guide is
recommended pre-reading before moving on to the details below.

Overview
This module enables populating content at configure time via any method
supported by the ExternalProject module. Whereas ExternalProject_Add()
downloads at build time, the FetchContent module makes content
available immediately, allowing the configure step to use the content
in commands like add_subdirectory(), include() or file() operations.

Content population details should be defined separately from the
command that performs the actual population. This separation ensures
that all the dependency details are defined before anything might try
to use them to populate content. This is particularly important in
more complex project hierarchies where dependencies may be shared
between multiple projects.

The following shows a typical example of declaring content details for
some dependencies and then ensuring they are populated with a separate
call:

FetchContent_Declare(
googletest
GIT_REPOSITORY https://github.com/google/googletest.git
GIT_TAG 703bd9caab50b139428cea1aaff9974ebee5742e # release-1.10.0
)
FetchContent_Declare(
myCompanyIcons
URL https://intranet.mycompany.com/assets/iconset_1.12.tar.gz
URL_HASH MD5=5588a7b18261c20068beabfb4f530b87
)

FetchContent_MakeAvailable(googletest myCompanyIcons)

The FetchContent_MakeAvailable() command ensures the named dependencies
have been populated, either by an earlier call, or by populating them
itself. When performing the population, it will also add them to the
main build, if possible, so that the main build can use the populated
projects' targets, etc. See the command's documentation for how these
steps are performed.

When using a hierarchical project arrangement, projects at higher
levels in the hierarchy are able to override the declared details of
content specified anywhere lower in the project hierarchy. The first
details to be declared for a given dependency take precedence,
regardless of where in the project hierarchy that occurs. Similarly,
the first call that tries to populate a dependency "wins", with
subsequent populations reusing the result of the first instead of
repeating the population again. See the Examples which demonstrate
this scenario.

The FetchContent module also supports defining and populating content
in a single call, with no check for whether the content has been
populated elsewhere already. This should not be done in projects, but
may be appropriate for populating content in CMake script mode. See
FetchContent_Populate() for details.

Commands

FetchContent_Declare

FetchContent_Declare(
<name>
<contentOptions>...
[EXCLUDE_FROM_ALL]
[SYSTEM]
[OVERRIDE_FIND_PACKAGE |
FIND_PACKAGE_ARGS args...]
)

The FetchContent_Declare() function records the options that
describe how to populate the specified content. If such details
have already been recorded earlier in this project (regardless
of where in the project hierarchy), this and all later calls for
the same content <name> are ignored. This "first to record,
wins" approach is what allows hierarchical projects to have
parent projects override content details of child projects.

The content <name> can be any string without spaces, but good
practice would be to use only letters, numbers, and underscores.
The name will be treated case-insensitively, and it should be
obvious for the content it represents. It is often the name of
the child project, or the value given to its top level project()
command (if it is a CMake project). For well-known public
projects, the name should generally be the official name of the
project. Choosing an unusual name makes it unlikely that other
projects needing that same content will use the same name,
leading to the content being populated multiple times.

The <contentOptions> can be any of the download, update, or
patch options that the ExternalProject_Add() command
understands. The configure, build, install, and test steps are
explicitly disabled, so options related to those steps will be
ignored. The SOURCE_SUBDIR option is an exception, see
FetchContent_MakeAvailable() for details on how that affects
behavior.

Changed in version 3.30: When policy CMP0168 is set to NEW, some
output-related and directory-related options are ignored. See
the policy documentation for details.

In most cases, <contentOptions> will just be a couple of options
defining the download method and method-specific details like a
commit tag or archive hash. For example:

FetchContent_Declare(
googletest
GIT_REPOSITORY https://github.com/google/googletest.git
GIT_TAG 703bd9caab50b139428cea1aaff9974ebee5742e # release-1.10.0
)

FetchContent_Declare(
myCompanyIcons
URL https://intranet.mycompany.com/assets/iconset_1.12.tar.gz
URL_HASH MD5=5588a7b18261c20068beabfb4f530b87
)

FetchContent_Declare(
myCompanyCertificates
SVN_REPOSITORY svn+ssh://svn.mycompany.com/srv/svn/trunk/certs
SVN_REVISION -r12345
)

Where contents are being fetched from a remote location and you
do not control that server, it is advisable to use a hash for
GIT_TAG rather than a branch or tag name. A commit hash is more
secure and helps to confirm that the downloaded contents are
what you expected.

Changed in version 3.14: Commands for the download, update, or
patch steps can access the terminal. This may be needed for
things like password prompts or real-time display of command
progress.

Added in version 3.22: The CMAKE_TLS_VERIFY, CMAKE_TLS_CAINFO,
CMAKE_NETRC, and CMAKE_NETRC_FILE variables now provide the
defaults for their corresponding content options, just like they
do for ExternalProject_Add(). Previously, these variables were
ignored by the FetchContent module.

Added in version 3.24:

FIND_PACKAGE_ARGS
This option is for scenarios where the
FetchContent_MakeAvailable() command may first try a call
to find_package() to satisfy the dependency for <name>.
By default, such a call would be simply
find_package(<name>), but FIND_PACKAGE_ARGS can be used
to provide additional arguments to be appended after the
<name>. FIND_PACKAGE_ARGS can also be given with nothing
after it, which indicates that find_package() can still
be called if FETCHCONTENT_TRY_FIND_PACKAGE_MODE is set to
OPT_IN, or is not set.

It would not normally be appropriate to specify REQUIRED
as one of the additional arguments after
FIND_PACKAGE_ARGS. Doing so would mean the
find_package() call must succeed, so none of the other
details specified in the FetchContent_Declare() call
would get a chance to be used as a fall-back.

Everything after the FIND_PACKAGE_ARGS keyword is
appended to the find_package() call, so all other
<contentOptions> must come before the FIND_PACKAGE_ARGS
keyword. If the CMAKE_FIND_PACKAGE_TARGETS_GLOBAL
variable is set to true at the time
FetchContent_Declare() is called, a GLOBAL keyword will
be appended to the find_package() arguments if it was not
already specified. It will also be appended if
FIND_PACKAGE_ARGS was not given, but
FETCHCONTENT_TRY_FIND_PACKAGE_MODE was set to ALWAYS.

OVERRIDE_FIND_PACKAGE cannot be used when
FIND_PACKAGE_ARGS is given.

Dependency Providers discusses another way that
FetchContent_MakeAvailable() calls can be redirected.
FIND_PACKAGE_ARGS is intended for project control,
whereas dependency providers allow users to override
project behavior.

OVERRIDE_FIND_PACKAGE
When a FetchContent_Declare(<name> ...) call includes
this option, subsequent calls to find_package(<name> ...)
will ensure that FetchContent_MakeAvailable(<name>) has
been called, then use the config package files in the
CMAKE_FIND_PACKAGE_REDIRECTS_DIR directory (which are
usually created by FetchContent_MakeAvailable()). This
effectively makes FetchContent_MakeAvailable() override
find_package() for the named dependency, allowing the
former to satisfy the package requirements of the latter.
FIND_PACKAGE_ARGS cannot be used when
OVERRIDE_FIND_PACKAGE is given.

If a dependency provider has been set and the project
calls find_package() for the <name> dependency,
OVERRIDE_FIND_PACKAGE will not prevent the provider from
seeing that call. Dependency providers always have the
opportunity to intercept any direct call to
find_package(), except if that call contains the
BYPASS_PROVIDER option.

Added in version 3.25:

SYSTEM If the SYSTEM argument is provided, the SYSTEM directory
property of a subdirectory added by
FetchContent_MakeAvailable() will be set to true. This
will affect non-imported targets created as part of that
command. See the SYSTEM target property documentation
for a more detailed discussion of the effects.

Added in version 3.28:

EXCLUDE_FROM_ALL
If the EXCLUDE_FROM_ALL argument is provided, then
targets in the subdirectory added by
FetchContent_MakeAvailable() will not be included in the
ALL target by default, and may be excluded from IDE
project files. See the documentation for the directory
property EXCLUDE_FROM_ALL for a detailed discussion of
the effects.

FetchContent_MakeAvailable
Added in version 3.14.

FetchContent_MakeAvailable(<name1> [<name2>...])

This command ensures that each of the named dependencies are
made available to the project by the time it returns. There
must have been a call to FetchContent_Declare() for each
dependency, and the first such call will control how that
dependency will be made available, as described below.

If <lowercaseName>_SOURCE_DIR is not set:

o Added in version 3.24: If a dependency provider is set, call
the provider's command with FETCHCONTENT_MAKEAVAILABLE_SERIAL
as the first argument, followed by the arguments of the first
call to FetchContent_Declare() for <name>. If SOURCE_DIR or
BINARY_DIR were not part of the original declared arguments,
they will be added with their default values. If
FETCHCONTENT_TRY_FIND_PACKAGE_MODE was set to NEVER when the
details were declared, any FIND_PACKAGE_ARGS will be omitted.
The OVERRIDE_FIND_PACKAGE keyword is also always omitted. If
the provider fulfilled the request,
FetchContent_MakeAvailable() will consider that dependency
handled, skip the remaining steps below, and move on to the
next dependency in the list.

o Added in version 3.24: If permitted, find_package(<name>
[<args>...]) will be called, where <args>... may be provided
by the FIND_PACKAGE_ARGS option in FetchContent_Declare().
The value of the FETCHCONTENT_TRY_FIND_PACKAGE_MODE variable
at the time FetchContent_Declare() was called determines
whether FetchContent_MakeAvailable() can call find_package().
If the CMAKE_FIND_PACKAGE_TARGETS_GLOBAL variable is set to
true when FetchContent_MakeAvailable() is called, it still
affects any imported targets created when that in turn calls
find_package(), even if that variable was false when the
corresponding details were declared.

If the dependency was not satisfied by a provider or a
find_package() call, FetchContent_MakeAvailable() then uses the
following logic to make the dependency available:

o If the dependency has already been populated earlier in this
run, set the <lowercaseName>_POPULATED,
<lowercaseName>_SOURCE_DIR, and <lowercaseName>_BINARY_DIR
variables in the same way as a call to
FetchContent_GetProperties(), then skip the remaining steps
below and move on to the next dependency in the list.

o Populate the dependency using the details recorded by an
earlier call to FetchContent_Declare(). Halt with a fatal
error if no such details have been recorded.
FETCHCONTENT_SOURCE_DIR_<uppercaseName> can be used to
override the declared details and use content provided at the
specified location instead.

o Added in version 3.24: Ensure the
CMAKE_FIND_PACKAGE_REDIRECTS_DIR directory contains a
<lowercaseName>-config.cmake and a
<lowercaseName>-config-version.cmake file (or equivalently,
<name>Config.cmake and <name>ConfigVersion.cmake). The
directory that the CMAKE_FIND_PACKAGE_REDIRECTS_DIR variable
points to is cleared at the start of every CMake run. If no
config file exists after populating the dependency in the
previous step, a minimal one will be written which includes
any <lowercaseName>-extra.cmake or <name>Extra.cmake file with
the OPTIONAL flag (so the files can be missing and won't
generate a warning). Similarly, if no config version file
exists, a very simple one will be written which sets
PACKAGE_VERSION_COMPATIBLE and PACKAGE_VERSION_EXACT to true.
This ensures all future calls to find_package() for the
dependency will use the redirected config file, regardless of
any version requirements. CMake cannot automatically
determine an arbitrary dependency's version, so it cannot set
PACKAGE_VERSION. When a dependency is pulled in via
add_subdirectory() in the next step, it may choose to
overwrite the generated config version file in
CMAKE_FIND_PACKAGE_REDIRECTS_DIR with one that also sets
PACKAGE_VERSION. The dependency may also write a
<lowercaseName>-extra.cmake or <name>Extra.cmake file to
perform custom processing, or define any variables that their
normal (installed) package config file would otherwise usually
define (many projects don't do any custom processing or set
any variables and therefore have no need to do this). If
required, the main project can write these files instead if
the dependency project doesn't do so. This allows the main
project to add missing details from older dependencies that
haven't or can't be updated to support this functionality.
See Integrating With find_package() for examples.

o If the top directory of the populated content contains a
CMakeLists.txt file, call add_subdirectory() to add it to the
main build. It is not an error for there to be no
CMakeLists.txt file, which allows the command to be used for
dependencies that make downloaded content available at a known
location, but which do not need or support being added
directly to the build.

Added in version 3.18: The SOURCE_SUBDIR option can be given
in the declared details to look somewhere below the top
directory instead (i.e. the same way that SOURCE_SUBDIR is
used by the ExternalProject_Add() command). The path provided
with SOURCE_SUBDIR must be relative, and it will be treated as
relative to the top directory. It can also point to a
directory that does not contain a CMakeLists.txt file, or even
to a directory that doesn't exist. This can be used to avoid
adding a project that contains a CMakeLists.txt file in its
top directory.

Added in version 3.25: If the SYSTEM keyword was included in
the call to FetchContent_Declare(), the SYSTEM keyword will be
added to the add_subdirectory() command.

Added in version 3.28: If the EXCLUDE_FROM_ALL keyword was
included in the call to FetchContent_Declare(), the
EXCLUDE_FROM_ALL keyword will be added to the
add_subdirectory() command.

Added in version 3.29: CMAKE_EXPORT_FIND_PACKAGE_NAME is set
to the dependency name before calling add_subdirectory().

Projects should aim to declare the details of all dependencies
they might use before they call FetchContent_MakeAvailable() for
any of them. This ensures that if any of the dependencies are
also sub-dependencies of one or more of the others, the main
project still controls the details that will be used (because it
will declare them first before the dependencies get a chance
to). In the following code samples, assume that the uses_other
dependency also uses FetchContent to add the other dependency
internally:

# WRONG: Should declare all details first
FetchContent_Declare(uses_other ...)
FetchContent_MakeAvailable(uses_other)

FetchContent_Declare(other ...) # Will be ignored, uses_other beat us to it
FetchContent_MakeAvailable(other) # Would use details declared by uses_other

# CORRECT: All details declared first, so they will take priority
FetchContent_Declare(uses_other ...)
FetchContent_Declare(other ...)
FetchContent_MakeAvailable(uses_other other)

Note that CMAKE_VERIFY_INTERFACE_HEADER_SETS is explicitly set
to false upon entry to FetchContent_MakeAvailable(), and is
restored to its original value before the command returns.
Developers typically only want to verify header sets from the
main project, not those from any dependencies. This local
manipulation of the CMAKE_VERIFY_INTERFACE_HEADER_SETS variable
provides that intuitive behavior. You can use variables like
CMAKE_PROJECT_INCLUDE or CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE to
turn verification back on for all or some dependencies. You can
also set the VERIFY_INTERFACE_HEADER_SETS property of individual
targets.

FetchContent_Populate
The FetchContent_Populate() command is a self-contained call
which can be used to perform content population as an isolated
operation. It is rarely the right command to use, projects
should almost always use FetchContent_Declare() and
FetchContent_MakeAvailable() instead. The main use case for
FetchContent_Populate() is in CMake script mode as part of
implementing some other higher level custom feature.

FetchContent_Populate(
<name>
[QUIET]
[SUBBUILD_DIR <subBuildDir>]
[SOURCE_DIR <srcDir>]
[BINARY_DIR <binDir>]
...
)

At least one option must be specified after <name>, otherwise
the call is interpreted differently (see below). The supported
options for FetchContent_Populate() are the same as those for
FetchContent_Declare(), with a few exceptions. The following do
not relate to populating content with FetchContent_Populate()
and therefore are not supported:

o EXCLUDE_FROM_ALL

o SYSTEM

o OVERRIDE_FIND_PACKAGE

o FIND_PACKAGE_ARGS

The few options shown in the signature above are either specific
to FetchContent_Populate(), or their behavior is slightly
modified from how ExternalProject_Add() treats them:

QUIET The QUIET option can be given to hide the output
associated with populating the specified content. If the
population fails, the output will be shown regardless of
whether this option was given or not so that the cause of
the failure can be diagnosed. The FETCHCONTENT_QUIET
variable has no effect on FetchContent_Populate() calls
of this form where the content details are provided
directly.

Changed in version 3.30: The QUIET option and
FETCHCONTENT_QUIET variable have no effect when policy
CMP0168 is set to NEW. The output is still quiet by
default in that case, but verbosity is controlled by the
message logging level (see CMAKE_MESSAGE_LOG_LEVEL and
--log-level).

SUBBUILD_DIR
The SUBBUILD_DIR argument can be provided to change the
location of the sub-build created to perform the
population. The default value is
${CMAKE_CURRENT_BINARY_DIR}/<lowercaseName>-subbuild, and
it would be unusual to need to override this default. If
a relative path is specified, it will be interpreted as
relative to CMAKE_CURRENT_BINARY_DIR. This option should
not be confused with the SOURCE_SUBDIR option, which only
affects the FetchContent_MakeAvailable() command.

Changed in version 3.30: SUBBUILD_DIR is ignored when
policy CMP0168 is set to NEW, since there is no sub-build
in that case.

SOURCE_DIR, BINARY_DIR
The SOURCE_DIR and BINARY_DIR arguments are supported by
ExternalProject_Add(), but different default values are
used by FetchContent_Populate(). SOURCE_DIR defaults to
${CMAKE_CURRENT_BINARY_DIR}/<lowercaseName>-src, and
BINARY_DIR defaults to
${CMAKE_CURRENT_BINARY_DIR}/<lowercaseName>-build. If a
relative path is specified, it will be interpreted as
relative to CMAKE_CURRENT_BINARY_DIR.

In addition to the above explicit options, any other
unrecognized options are passed through unmodified to
ExternalProject_Add() to set up the download, patch, and update
steps. The following options are explicitly prohibited (they
are disabled by the FetchContent_Populate() command):

o CONFIGURE_COMMAND

o BUILD_COMMAND

o INSTALL_COMMAND

o TEST_COMMAND

With this form, the FETCHCONTENT_FULLY_DISCONNECTED and
FETCHCONTENT_UPDATES_DISCONNECTED variables and policy CMP0170
are ignored.

When this form of FetchContent_Populate() returns, the following
variables will be set in the scope of the caller:

<lowercaseName>_SOURCE_DIR
The location where the populated content can be found
upon return.

<lowercaseName>_BINARY_DIR
A directory originally intended for use as a
corresponding build directory, but is unlikely to be
relevant when using this form of the command.

If using FetchContent_Populate() within CMake script mode, be
aware that the implementation sets up a sub-build which
therefore requires a CMake generator and build tool to be
available. If these cannot be found by default, then the
CMAKE_GENERATOR and potentially the CMAKE_MAKE_PROGRAM variables
will need to be set appropriately on the command line invoking
the script.

Changed in version 3.30: If policy CMP0168 is set to NEW, no
sub-build is used. Within CMake script mode, that allows
FetchContent_Populate() to be called without any build tool or
CMake generator.

Added in version 3.18: Added support for the DOWNLOAD_NO_EXTRACT
option.

The command supports another form, although it should no longer be
used:

FetchContent_Populate(<name>)

Changed in version 3.30: This form is deprecated. Policy CMP0169
provides backward compatibility for projects that still need to use
this form, but projects should be updated to use
FetchContent_MakeAvailable() instead.

In this form, the only argument given to FetchContent_Populate() is
the <name>. When used this way, the command assumes the content
details have been recorded by an earlier call to
FetchContent_Declare(). The details are stored in a global
property, so they are unaffected by things like variable or
directory scope. Therefore, it doesn't matter where in the project
the details were previously declared, as long as they have been
declared before the call to FetchContent_Populate(). Those saved
details are then used to populate the content using a method based
on ExternalProject_Add() (see policy CMP0168 for important
behavioral aspects of how that is done).

When this form of FetchContent_Populate() returns, the following
variables will be set in the scope of the caller:

<lowercaseName>_POPULATED
This will always be set to TRUE by the call.

<lowercaseName>_SOURCE_DIR
The location where the populated content can be found upon
return.

<lowercaseName>_BINARY_DIR
A directory intended for use as a corresponding build
directory.

The values of the three variables can also be retrieved from
anywhere in the project hierarchy using the
FetchContent_GetProperties() command.

The implementation ensures that if the content has already been
populated in a previous CMake run, that content will be reused
rather than repopulating again. For the common case where
population involves downloading content, the cost of the download is
only paid once. But note that it is an error to call
FetchContent_Populate(<name>) with the same <name> more than once
within a single CMake run. See FetchContent_GetProperties() for how
to determine if population of a <name> has already been performed in
the current run.

FetchContent_GetProperties
When using saved content details, a call to
FetchContent_MakeAvailable() or FetchContent_Populate() records
information in global properties which can be queried at any
time. This information may include the source and binary
directories associated with the content, and also whether or not
the content population has been processed during the current
configure run.

FetchContent_GetProperties(
<name>
[SOURCE_DIR <srcDirVar>]
[BINARY_DIR <binDirVar>]
[POPULATED <doneVar>]
)

The SOURCE_DIR, BINARY_DIR, and POPULATED options can be used to
specify which properties should be retrieved. Each option
accepts a value which is the name of the variable in which to
store that property. Most of the time though, only <name> is
given, in which case the call will then set the same variables
as a call to FetchContent_MakeAvailable(name) or
FetchContent_Populate(name). Note that the SOURCE_DIR and
BINARY_DIR values can be empty if the call is fulfilled by a
dependency provider.

This command is rarely needed when using
FetchContent_MakeAvailable(). It is more commonly used as part
of implementing the deprecated pattern with
FetchContent_Populate(), which ensures that the relevant
variables will always be defined regardless of whether or not
the population has been performed elsewhere in the project
already:

# WARNING: This pattern is deprecated, don't use it!
#
# Check if population has already been performed
FetchContent_GetProperties(depname)
if(NOT depname_POPULATED)
# Fetch the content using previously declared details
FetchContent_Populate(depname)

# Set custom variables, policies, etc.
# ...

# Bring the populated content into the build
add_subdirectory(${depname_SOURCE_DIR} ${depname_BINARY_DIR})
endif()

FetchContent_SetPopulated
Added in version 3.24.

NOTE:
This command should only be called by dependency providers.
Calling it in any other context is unsupported and future
CMake versions may halt with a fatal error in such cases.

FetchContent_SetPopulated(
<name>
[SOURCE_DIR <srcDir>]
[BINARY_DIR <binDir>]
)

If a provider command fulfills a
FETCHCONTENT_MAKEAVAILABLE_SERIAL request, it must call this
function before returning. The SOURCE_DIR and BINARY_DIR
arguments can be used to specify the values that
FetchContent_GetProperties() should return for its corresponding
arguments. Only provide SOURCE_DIR and BINARY_DIR if they have
the same meaning as if they had been populated by the built-in
FetchContent_MakeAvailable() implementation.

Variables
A number of cache variables can influence the behavior where details
from a FetchContent_Declare() call are used to populate content.

NOTE:
All of these variables are intended for the developer to customize
behavior. They should not normally be set by the project.

FETCHCONTENT_BASE_DIR
In most cases, the saved details do not specify any options
relating to the directories to use for the internal sub-build,
final source, and build areas. It is generally best to leave
these decisions up to the FetchContent module to handle on the
project's behalf. The FETCHCONTENT_BASE_DIR cache variable
controls the point under which all content population
directories are collected, but in most cases, developers would
not need to change this. The default location is
${CMAKE_BINARY_DIR}/_deps, but if developers change this value,
they should aim to keep the path short and just below the top
level of the build tree to avoid running into path length
problems on Windows.

FETCHCONTENT_QUIET
The logging output during population can be quite verbose,
making the configure stage quite noisy. This cache option (ON
by default) hides all population output unless an error is
encountered. If experiencing problems with hung downloads,
temporarily switching this option off may help diagnose which
content population is causing the issue.

Changed in version 3.30: FETCHCONTENT_QUIET is ignored if policy
CMP0168 is set to NEW. The output is still quiet by default in
that case, but verbosity is controlled by the message logging
level (see CMAKE_MESSAGE_LOG_LEVEL and --log-level).

FETCHCONTENT_FULLY_DISCONNECTED
When this option is enabled, no attempt is made to download or
update any content. It is assumed that all content has already
been populated in a previous run, or the source directories have
been pointed at existing contents the developer has provided
manually (using options described further below). When the
developer knows that no changes have been made to any content
details, turning this option ON can speed up the configure
stage. It is OFF by default.

NOTE:
The FETCHCONTENT_FULLY_DISCONNECTED variable is not an
appropriate way to prevent any network access on the first
run in a build directory. Doing so can break projects, lead
to misleading error messages, and hide subtle population
failures. This variable is specifically intended to only be
turned on after the first time CMake has been run. If you
want to prevent network access even on the first run, use a
dependency provider and populate the dependency from local
content instead.

Changed in version 3.30: The constraint that the source
directory has already been populated when
FETCHCONTENT_FULLY_DISCONNECTED is true is now enforced. See
policy CMP0170.

FETCHCONTENT_UPDATES_DISCONNECTED
This is a less severe download/update control compared to
FETCHCONTENT_FULLY_DISCONNECTED. Instead of bypassing all
download and update logic, FETCHCONTENT_UPDATES_DISCONNECTED
only prevents the update step from making connections to remote
servers when using the git or hg download methods. Updates
still occur if details about the update step change, but the
update is attempted with only the information already available
locally (so switching to a different tag or commit that is
already fetched locally will succeed, but switching to an
unknown commit hash will fail). The download step is not
affected, so if content has not been downloaded previously, it
will still be downloaded when this option is enabled. This can
speed up the configure step, but not as much as
FETCHCONTENT_FULLY_DISCONNECTED.
FETCHCONTENT_UPDATES_DISCONNECTED is OFF by default.

FETCHCONTENT_TRY_FIND_PACKAGE_MODE
Added in version 3.24.

This variable modifies the details that FetchContent_Declare()
records for a given dependency. While it ultimately controls
the behavior of FetchContent_MakeAvailable(), it is the
variable's value when FetchContent_Declare() is called that gets
used. It makes no difference what the variable is set to when
FetchContent_MakeAvailable() is called. Since the variable
should only be set by the user and not by projects directly, it
will typically have the same value throughout anyway, so this
distinction is not usually noticeable.

FETCHCONTENT_TRY_FIND_PACKAGE_MODE ultimately controls whether
FetchContent_MakeAvailable() is allowed to call find_package()
to satisfy a dependency. The variable can be set to one of the
following values:

OPT_IN FetchContent_MakeAvailable() will only call
find_package() if the FetchContent_Declare() call
included a FIND_PACKAGE_ARGS keyword. This is also the
default behavior if FETCHCONTENT_TRY_FIND_PACKAGE_MODE is
not set.

ALWAYS find_package() can be called by
FetchContent_MakeAvailable() regardless of whether the
FetchContent_Declare() call included a FIND_PACKAGE_ARGS
keyword or not. If no FIND_PACKAGE_ARGS keyword was
given, the behavior will be as though FIND_PACKAGE_ARGS
had been provided, with no additional arguments after it.

NEVER FetchContent_MakeAvailable() will not call
find_package(). Any FIND_PACKAGE_ARGS given to the
FetchContent_Declare() call will be ignored.

As a special case, if the
FETCHCONTENT_SOURCE_DIR_<uppercaseName> variable has a non-empty
value for a dependency, it is assumed that the user is
overriding all other methods of making that dependency
available. FETCHCONTENT_TRY_FIND_PACKAGE_MODE will have no
effect on that dependency and FetchContent_MakeAvailable() will
not try to call find_package() for it.

In addition to the above, the following variables are also defined for
each content name:

FETCHCONTENT_SOURCE_DIR_<uppercaseName>
If this is set, no download or update steps are performed for
the specified content and the <lowercaseName>_SOURCE_DIR
variable returned to the caller is pointed at this location.
This gives developers a way to have a separate checkout of the
content that they can modify freely without interference from
the build. The build simply uses that existing source, but it
still defines <lowercaseName>_BINARY_DIR to point inside its own
build area. Developers are strongly encouraged to use this
mechanism rather than editing the sources populated in the
default location, as changes to sources in the default location
can be lost when content population details are changed by the
project.

FETCHCONTENT_UPDATES_DISCONNECTED_<uppercaseName>
This is the per-content equivalent of
FETCHCONTENT_UPDATES_DISCONNECTED. If the global option or this
option is ON, then updates for the git and hg methods will not
contact any remote for the named content. They will only use
information already available locally. Disabling updates for
individual content can be useful for content whose details
rarely change, while still leaving other frequently changing
content with updates enabled.

Examples
Typical Case
This first fairly straightforward example ensures that some popular
testing frameworks are available to the main build:

include(FetchContent)
FetchContent_Declare(
googletest
GIT_REPOSITORY https://github.com/google/googletest.git
GIT_TAG 703bd9caab50b139428cea1aaff9974ebee5742e # release-1.10.0
)
FetchContent_Declare(
Catch2
GIT_REPOSITORY https://github.com/catchorg/Catch2.git
GIT_TAG 605a34765aa5d5ecbf476b4598a862ada971b0cc # v3.0.1
)

# After the following call, the CMake targets defined by googletest and
# Catch2 will be available to the rest of the build
FetchContent_MakeAvailable(googletest Catch2)

Integrating With find_package()
For the previous example, if the user wanted to try to find googletest
and Catch2 via find_package() first before trying to download and build
them from source, they could set the FETCHCONTENT_TRY_FIND_PACKAGE_MODE
variable to ALWAYS. This would also affect any other calls to
FetchContent_Declare() throughout the project, which might not be
acceptable. The behavior can be enabled for just these two
dependencies instead by adding FIND_PACKAGE_ARGS to the declared
details and leaving FETCHCONTENT_TRY_FIND_PACKAGE_MODE unset, or set to
OPT_IN:

include(FetchContent)
FetchContent_Declare(
googletest
GIT_REPOSITORY https://github.com/google/googletest.git
GIT_TAG 703bd9caab50b139428cea1aaff9974ebee5742e # release-1.10.0
FIND_PACKAGE_ARGS NAMES GTest
)
FetchContent_Declare(
Catch2
GIT_REPOSITORY https://github.com/catchorg/Catch2.git
GIT_TAG 605a34765aa5d5ecbf476b4598a862ada971b0cc # v3.0.1
FIND_PACKAGE_ARGS
)

# This will try calling find_package() first for both dependencies
FetchContent_MakeAvailable(googletest Catch2)

For Catch2, no additional arguments to find_package() are needed, so no
additional arguments are provided after the FIND_PACKAGE_ARGS keyword.
For googletest, its package is more commonly called GTest, so arguments
are added to support it being found by that name.

If the user wanted to disable FetchContent_MakeAvailable() from calling
find_package() for any dependency, even if it provided
FIND_PACKAGE_ARGS in its declared details, they could set
FETCHCONTENT_TRY_FIND_PACKAGE_MODE to NEVER.

If the project wanted to indicate that these two dependencies should be
downloaded and built from source and that find_package() calls should
be redirected to use the built dependencies, the OVERRIDE_FIND_PACKAGE
option should be used when declaring the content details:

include(FetchContent)
FetchContent_Declare(
googletest
GIT_REPOSITORY https://github.com/google/googletest.git
GIT_TAG 703bd9caab50b139428cea1aaff9974ebee5742e # release-1.10.0
OVERRIDE_FIND_PACKAGE
)
FetchContent_Declare(
Catch2
GIT_REPOSITORY https://github.com/catchorg/Catch2.git
GIT_TAG 605a34765aa5d5ecbf476b4598a862ada971b0cc # v3.0.1
OVERRIDE_FIND_PACKAGE
)

# The following will automatically forward through to FetchContent_MakeAvailable()
find_package(googletest)
find_package(Catch2)

CMake provides a FindGTest module which defines some variables that
older projects may use instead of linking to the imported targets. To
support those cases, we can provide an extra file. In keeping with the
"first to define, wins" philosophy of FetchContent, we only write out
that file if something else hasn't already done so.

FetchContent_MakeAvailable(googletest)

if(NOT EXISTS ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/googletest-extra.cmake AND
NOT EXISTS ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/googletestExtra.cmake)
file(WRITE ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/googletest-extra.cmake
[=[
if("${GTEST_LIBRARIES}" STREQUAL "" AND TARGET GTest::gtest)
set(GTEST_LIBRARIES GTest::gtest)
endif()
if("${GTEST_MAIN_LIBRARIES}" STREQUAL "" AND TARGET GTest::gtest_main)
set(GTEST_MAIN_LIBRARIES GTest::gtest_main)
endif()
if("${GTEST_BOTH_LIBRARIES}" STREQUAL "")
set(GTEST_BOTH_LIBRARIES ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES})
endif()
]=])
endif()

Projects will also likely be using find_package(GTest) rather than
find_package(googletest), but it is possible to make use of the
CMAKE_FIND_PACKAGE_REDIRECTS_DIR area to pull in the latter as a
dependency of the former. This is likely to be sufficient to satisfy a
typical find_package(GTest) call.

FetchContent_MakeAvailable(googletest)

if(NOT EXISTS ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/gtest-config.cmake AND
NOT EXISTS ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/GTestConfig.cmake)
file(WRITE ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/gtest-config.cmake
[=[
include(CMakeFindDependencyMacro)
find_dependency(googletest)
]=])
endif()

if(NOT EXISTS ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/gtest-config-version.cmake AND
NOT EXISTS ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/GTestConfigVersion.cmake)
file(WRITE ${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/gtest-config-version.cmake
[=[
include(${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/googletest-config-version.cmake OPTIONAL)
if(NOT PACKAGE_VERSION_COMPATIBLE)
include(${CMAKE_FIND_PACKAGE_REDIRECTS_DIR}/googletestConfigVersion.cmake OPTIONAL)
endif()
]=])
endif()

Overriding Where To Find CMakeLists.txt
If the sub-project's CMakeLists.txt file is not at the top level of its
source tree, the SOURCE_SUBDIR option can be used to tell FetchContent
where to find it. The following example shows how to use that option,
and it also sets a variable which is meaningful to the subproject
before pulling it into the main build (set as an INTERNAL cache
variable to avoid problems with policy CMP0077):

include(FetchContent)
FetchContent_Declare(
protobuf
GIT_REPOSITORY https://github.com/protocolbuffers/protobuf.git
GIT_TAG ae50d9b9902526efd6c7a1907d09739f959c6297 # v3.15.0
SOURCE_SUBDIR cmake
)
set(protobuf_BUILD_TESTS OFF CACHE INTERNAL "")
FetchContent_MakeAvailable(protobuf)

Complex Dependency Hierarchies
In more complex project hierarchies, the dependency relationships can
be more complicated. Consider a hierarchy where projA is the top level
project and it depends directly on projects projB and projC. Both
projB and projC can be built standalone and they also both depend on
another project projD. projB additionally depends on projE. This
example assumes that all five projects are available on a company git
server. The CMakeLists.txt of each project might have sections like
the following:

projA

include(FetchContent)
FetchContent_Declare(
projB
GIT_REPOSITORY git@mycompany.com:git/projB.git
GIT_TAG 4a89dc7e24ff212a7b5167bef7ab079d
)
FetchContent_Declare(
projC
GIT_REPOSITORY git@mycompany.com:git/projC.git
GIT_TAG 4ad4016bd1d8d5412d135cf8ceea1bb9
)
FetchContent_Declare(
projD
GIT_REPOSITORY git@mycompany.com:git/projD.git
GIT_TAG origin/integrationBranch
)
FetchContent_Declare(
projE
GIT_REPOSITORY git@mycompany.com:git/projE.git
GIT_TAG v2.3-rc1
)

# Order is important, see notes in the discussion further below
FetchContent_MakeAvailable(projD projB projC)

projB

include(FetchContent)
FetchContent_Declare(
projD
GIT_REPOSITORY git@mycompany.com:git/projD.git
GIT_TAG 20b415f9034bbd2a2e8216e9a5c9e632
)
FetchContent_Declare(
projE
GIT_REPOSITORY git@mycompany.com:git/projE.git
GIT_TAG 68e20f674a48be38d60e129f600faf7d
)

FetchContent_MakeAvailable(projD projE)

projC

include(FetchContent)
FetchContent_Declare(
projD
GIT_REPOSITORY git@mycompany.com:git/projD.git
GIT_TAG 7d9a17ad2c962aa13e2fbb8043fb6b8a
)

FetchContent_MakeAvailable(projD)

A few key points should be noted in the above:

o projB and projC define different content details for projD, but projA
also defines a set of content details for projD. Because projA will
define them first, the details from projB and projC will not be used.
The override details defined by projA are not required to match
either of those from projB or projC, but it is up to the higher level
project to ensure that the details it does define still make sense
for the child projects.

o In the projA call to FetchContent_MakeAvailable(), projD is listed
ahead of projB and projC, so it will be populated before either projB
or projC. It isn't required for projA to do this, doing so ensures
that projA fully controls the environment in which projD is brought
into the build (directory properties are particularly relevant).

o While projA defines content details for projE, it does not need to
explicitly call FetchContent_MakeAvailable(projE) or
FetchContent_Populate(projD) itself. Instead, it leaves that to the
child projB. For higher level projects, it is often enough to just
define the override content details and leave the actual population
to the child projects. This saves repeating the same thing at each
level of the project hierarchy unnecessarily, but it should only be
done if directory properties set by dependencies are not expected to
influence the population of the shared dependency (projE in this
case).

Populating Content Without Adding It To The Build
Projects don't always need to add the populated content to the build.
Sometimes the project just wants to make the downloaded content
available at a predictable location. The next example ensures that a
set of standard company toolchain files (and potentially even the
toolchain binaries themselves) is available early enough to be used for
that same build.

cmake_minimum_required(VERSION 3.14)

include(FetchContent)
FetchContent_Declare(
mycom_toolchains
URL https://intranet.mycompany.com//toolchains_1.3.2.tar.gz
)
FetchContent_MakeAvailable(mycom_toolchains)

project(CrossCompileExample)

The project could be configured to use one of the downloaded toolchains
like so:

cmake -DCMAKE_TOOLCHAIN_FILE=_deps/mycom_toolchains-src/toolchain_arm.cmake /path/to/src

When CMake processes the CMakeLists.txt file, it will download and
unpack the tarball into _deps/mycompany_toolchains-src relative to the
build directory. The CMAKE_TOOLCHAIN_FILE variable is not used until
the project() command is reached, at which point CMake looks for the
named toolchain file relative to the build directory. Because the
tarball has already been downloaded and unpacked by then, the toolchain
file will be in place, even the very first time that cmake is run in
the build directory.

Populating Content In CMake Script Mode
This last example demonstrates how one might download and unpack a
firmware tarball using CMake's script mode. The call to
FetchContent_Populate() specifies all the content details and the
unpacked firmware will be placed in a firmware directory below the
current working directory.

getFirmware.cmake

# NOTE: Intended to be run in script mode with cmake -P
include(FetchContent)
FetchContent_Populate(
firmware
URL https://mycompany.com/assets/firmware-1.23-arm.tar.gz
URL_HASH MD5=68247684da89b608d466253762b0ff11
SOURCE_DIR firmware
)

FindPackageHandleStandardArgs
This module provides functions intended to be used in Find Modules
implementing find_package(<PackageName>) calls.

find_package_handle_standard_args
This command handles the REQUIRED, QUIET and version-related
arguments of find_package(). It also sets the
<PackageName>_FOUND variable. The package is considered found
if all variables listed contain valid results, e.g. valid
filepaths.

There are two signatures:

find_package_handle_standard_args(<PackageName>
(DEFAULT_MSG|<custom-failure-message>)
<required-var>...
)

find_package_handle_standard_args(<PackageName>
[FOUND_VAR <result-var>]
[REQUIRED_VARS <required-var>...]
[VERSION_VAR <version-var>]
[HANDLE_VERSION_RANGE]
[HANDLE_COMPONENTS]
[CONFIG_MODE]
[NAME_MISMATCHED]
[REASON_FAILURE_MESSAGE <reason-failure-message>]
[FAIL_MESSAGE <custom-failure-message>]
)

The <PackageName>_FOUND variable will be set to TRUE if all the
variables <required-var>... are valid and any optional
constraints are satisfied, and FALSE otherwise. A success or
failure message may be displayed based on the results and on
whether the REQUIRED and/or QUIET option was given to the
find_package() call.

The options are:

(DEFAULT_MSG|<custom-failure-message>)
In the simple signature this specifies the failure
message. Use DEFAULT_MSG to ask for a default message to
be computed (recommended). Not valid in the full
signature.

FOUND_VAR <result-var>
Deprecated since version 3.3.

Specifies either <PackageName>_FOUND or
<PACKAGENAME>_FOUND as the result variable. This exists
only for compatibility with older versions of CMake and
is now ignored. Result variables of both names are
always set for compatibility.

REQUIRED_VARS <required-var>...
Specify the variables which are required for this
package. These may be named in the generated failure
message asking the user to set the missing variable
values. Therefore these should typically be cache
entries such as FOO_LIBRARY and not output variables like
FOO_LIBRARIES.

Changed in version 3.18: If HANDLE_COMPONENTS is
specified, this option can be omitted.

VERSION_VAR <version-var>
Specify the name of a variable that holds the version of
the package that has been found. This version will be
checked against the (potentially) specified required
version given to the find_package() call, including its
EXACT option. The default messages include information
about the required version and the version which has been
actually found, both if the version is ok or not.

HANDLE_VERSION_RANGE
Added in version 3.19.

Enable handling of a version range, if one is specified.
Without this option, a developer warning will be
displayed if a version range is specified.

HANDLE_COMPONENTS
Enable handling of package components. In this case, the
command will report which components have been found and
which are missing, and the <PackageName>_FOUND variable
will be set to FALSE if any of the required components
(i.e. not the ones listed after the OPTIONAL_COMPONENTS
option of find_package()) are missing.

CONFIG_MODE
Specify that the calling find module is a wrapper around
a call to find_package(<PackageName> NO_MODULE). This
implies a VERSION_VAR value of <PackageName>_VERSION.
The command will automatically check whether the package
configuration file was found.

REASON_FAILURE_MESSAGE <reason-failure-message>
Added in version 3.16.

Specify a custom message of the reason for the failure
which will be appended to the default generated message.

FAIL_MESSAGE <custom-failure-message>
Specify a custom failure message instead of using the
default generated message. Not recommended.

NAME_MISMATCHED
Added in version 3.17.

Indicate that the <PackageName> does not match
${CMAKE_FIND_PACKAGE_NAME}. This is usually a mistake and
raises a warning, but it may be intentional for usage of
the command for components of a larger package.

Example for the simple signature:

find_package_handle_standard_args(LibXml2 DEFAULT_MSG
LIBXML2_LIBRARY LIBXML2_INCLUDE_DIR)

The LibXml2 package is considered to be found if both LIBXML2_LIBRARY
and LIBXML2_INCLUDE_DIR are valid. Then also LibXml2_FOUND is set to
TRUE. If it is not found and REQUIRED was used, it fails with a
message(FATAL_ERROR), independent whether QUIET was used or not. If it
is found, success will be reported, including the content of the first
<required-var>. On repeated CMake runs, the same message will not be
printed again.

NOTE:
If <PackageName> does not match CMAKE_FIND_PACKAGE_NAME for the
calling module, a warning that there is a mismatch is given. The
FPHSA_NAME_MISMATCHED variable may be set to bypass the warning if
using the old signature and the NAME_MISMATCHED argument using the
new signature. To avoid forcing the caller to require newer versions
of CMake for usage, the variable's value will be used if defined
when the NAME_MISMATCHED argument is not passed for the new
signature (but using both is an error)..

Example for the full signature:

find_package_handle_standard_args(LibArchive
REQUIRED_VARS LibArchive_LIBRARY LibArchive_INCLUDE_DIR
VERSION_VAR LibArchive_VERSION)

In this case, the LibArchive package is considered to be found if both
LibArchive_LIBRARY and LibArchive_INCLUDE_DIR are valid. Also the
version of LibArchive will be checked by using the version contained in
LibArchive_VERSION. Since no FAIL_MESSAGE is given, the default
messages will be printed.

Another example for the full signature:

find_package(Automoc4 QUIET NO_MODULE HINTS /opt/automoc4)
find_package_handle_standard_args(Automoc4 CONFIG_MODE)

In this case, a FindAutmoc4.cmake module wraps a call to
find_package(Automoc4 NO_MODULE) and adds an additional search
directory for automoc4. Then the call to
find_package_handle_standard_args produces a proper success/failure
message.

find_package_check_version
Added in version 3.19.

Helper function which can be used to check if a <version> is
valid against version-related arguments of find_package().

find_package_check_version(<version> <result-var>
[HANDLE_VERSION_RANGE]
[RESULT_MESSAGE_VARIABLE <message-var>]
)

The <result-var> will hold a boolean value giving the result of
the check.

The options are:

HANDLE_VERSION_RANGE
Enable handling of a version range, if one is specified.
Without this option, a developer warning will be
displayed if a version range is specified.

RESULT_MESSAGE_VARIABLE <message-var>
Specify a variable to get back a message describing the
result of the check.

Example for the usage:

find_package_check_version(1.2.3 result HANDLE_VERSION_RANGE
RESULT_MESSAGE_VARIABLE reason)
if (result)
message (STATUS "${reason}")
else()
message (FATAL_ERROR "${reason}")
endif()

FindPackageMessage

find_package_message(<name> "message for user" "find result details")

This function is intended to be used in FindXXX.cmake modules files.
It will print a message once for each unique find result. This is
useful for telling the user where a package was found. The first
argument specifies the name (XXX) of the package. The second argument
specifies the message to display. The third argument lists details
about the find result so that if they change the message will be
displayed again. The macro also obeys the QUIET argument to the
find_package command.

Example:

if(X11_FOUND)
find_package_message(X11 "Found X11: ${X11_X11_LIB}"
"[${X11_X11_LIB}][${X11_INCLUDE_DIR}]")
else()
...
endif()

FortranCInterface
Fortran/C Interface Detection

This module automatically detects the API by which C and Fortran
languages interact.

Module Variables
Variables that indicate if the mangling is found:

FortranCInterface_GLOBAL_FOUND
Global subroutines and functions.

FortranCInterface_MODULE_FOUND
Module subroutines and functions (declared by "MODULE
PROCEDURE").

This module also provides the following variables to specify the
detected mangling, though a typical use case does not need to reference
them and can use the Module Functions below.

FortranCInterface_GLOBAL_PREFIX
Prefix for a global symbol without an underscore.

FortranCInterface_GLOBAL_SUFFIX
Suffix for a global symbol without an underscore.

FortranCInterface_GLOBAL_CASE
The case for a global symbol without an underscore, either UPPER
or LOWER.

FortranCInterface_GLOBAL__PREFIX
Prefix for a global symbol with an underscore.

FortranCInterface_GLOBAL__SUFFIX
Suffix for a global symbol with an underscore.

FortranCInterface_GLOBAL__CASE
The case for a global symbol with an underscore, either UPPER or
LOWER.

FortranCInterface_MODULE_PREFIX
Prefix for a module symbol without an underscore.

FortranCInterface_MODULE_MIDDLE
Middle of a module symbol without an underscore that appears
between the name of the module and the name of the symbol.

FortranCInterface_MODULE_SUFFIX
Suffix for a module symbol without an underscore.

FortranCInterface_MODULE_CASE
The case for a module symbol without an underscore, either UPPER
or LOWER.

FortranCInterface_MODULE__PREFIX
Prefix for a module symbol with an underscore.

FortranCInterface_MODULE__MIDDLE
Middle of a module symbol with an underscore that appears
between the name of the module and the name of the symbol.

FortranCInterface_MODULE__SUFFIX
Suffix for a module symbol with an underscore.

FortranCInterface_MODULE__CASE
The case for a module symbol with an underscore, either UPPER or
LOWER.

Module Functions

FortranCInterface_HEADER
The FortranCInterface_HEADER function is provided to generate a
C header file containing macros to mangle symbol names:

FortranCInterface_HEADER(<file>
[MACRO_NAMESPACE <macro-ns>]
[SYMBOL_NAMESPACE <ns>]
[SYMBOLS [<module>:]<function> ...])

It generates in <file> definitions of the following macros:

#define FortranCInterface_GLOBAL (name,NAME) ...
#define FortranCInterface_GLOBAL_(name,NAME) ...
#define FortranCInterface_MODULE (mod,name, MOD,NAME) ...
#define FortranCInterface_MODULE_(mod,name, MOD,NAME) ...

These macros mangle four categories of Fortran symbols,
respectively:

o Global symbols without '_': call mysub()

o Global symbols with '_' : call my_sub()

o Module symbols without '_': use mymod; call mysub()

o Module symbols with '_' : use mymod; call my_sub()

If mangling for a category is not known, its macro is left
undefined. All macros require raw names in both lower case and
upper case.

The options are:

MACRO_NAMESPACE
Replace the default FortranCInterface_ prefix with a
given namespace <macro-ns>.

SYMBOLS
List symbols to mangle automatically with C preprocessor
definitions:

<function> ==> #define <ns><function> ...
<module>:<function> ==> #define <ns><module>_<function> ...

If the mangling for some symbol is not known then no
preprocessor definition is created, and a warning is
displayed.

SYMBOL_NAMESPACE
Prefix all preprocessor definitions generated by the
SYMBOLS option with a given namespace <ns>.

FortranCInterface_VERIFY
The FortranCInterface_VERIFY function is provided to verify that
the Fortran and C/C++ compilers work together:

FortranCInterface_VERIFY([CXX] [QUIET])

It tests whether a simple test executable using Fortran and C
(and C++ when the CXX option is given) compiles and links
successfully. The result is stored in the cache entry
FortranCInterface_VERIFIED_C (or FortranCInterface_VERIFIED_CXX
if CXX is given) as a boolean. If the check fails and QUIET is
not given the function terminates with a fatal error message
describing the problem. The purpose of this check is to stop a
build early for incompatible compiler combinations. The test is
built in the Release configuration.

Example Usage

include(FortranCInterface)
FortranCInterface_HEADER(FC.h MACRO_NAMESPACE "FC_")

This creates a "FC.h" header that defines mangling macros FC_GLOBAL(),
FC_GLOBAL_(), FC_MODULE(), and FC_MODULE_().

include(FortranCInterface)
FortranCInterface_HEADER(FCMangle.h
MACRO_NAMESPACE "FC_"
SYMBOL_NAMESPACE "FC_"
SYMBOLS mysub mymod:my_sub)

This creates a "FCMangle.h" header that defines the same FC_*()
mangling macros as the previous example plus preprocessor symbols
FC_mysub and FC_mymod_my_sub.

Additional Manglings
FortranCInterface is aware of possible GLOBAL and MODULE manglings for
many Fortran compilers, but it also provides an interface to specify
new possible manglings. Set the variables:

FortranCInterface_GLOBAL_SYMBOLS
FortranCInterface_MODULE_SYMBOLS

before including FortranCInterface to specify manglings of the symbols
MySub, My_Sub, MyModule:MySub, and My_Module:My_Sub. For example, the
code:

set(FortranCInterface_GLOBAL_SYMBOLS mysub_ my_sub__ MYSUB_)
# ^^^^^ ^^^^^^ ^^^^^
set(FortranCInterface_MODULE_SYMBOLS
__mymodule_MOD_mysub __my_module_MOD_my_sub)
# ^^^^^^^^ ^^^^^ ^^^^^^^^^ ^^^^^^
include(FortranCInterface)

tells FortranCInterface to try given GLOBAL and MODULE manglings. (The
carets point at raw symbol names for clarity in this example but are
not needed.)

GenerateExportHeader
Function for generation of export macros for libraries

This module provides the function GENERATE_EXPORT_HEADER().

Added in version 3.12: Added support for C projects. Previous versions
supported C++ project only.

The GENERATE_EXPORT_HEADER function can be used to generate a file
suitable for preprocessor inclusion which contains EXPORT macros to be
used in library classes:

GENERATE_EXPORT_HEADER( LIBRARY_TARGET
[BASE_NAME <base_name>]
[EXPORT_MACRO_NAME <export_macro_name>]
[EXPORT_FILE_NAME <export_file_name>]
[DEPRECATED_MACRO_NAME <deprecated_macro_name>]
[NO_EXPORT_MACRO_NAME <no_export_macro_name>]
[INCLUDE_GUARD_NAME <include_guard_name>]
[STATIC_DEFINE <static_define>]
[NO_DEPRECATED_MACRO_NAME <no_deprecated_macro_name>]
[DEFINE_NO_DEPRECATED]
[PREFIX_NAME <prefix_name>]
[CUSTOM_CONTENT_FROM_VARIABLE <variable>]
)

The target properties CXX_VISIBILITY_PRESET and
VISIBILITY_INLINES_HIDDEN can be used to add the appropriate compile
flags for targets. See the documentation of those target properties,
and the convenience variables CMAKE_CXX_VISIBILITY_PRESET and
CMAKE_VISIBILITY_INLINES_HIDDEN.

By default GENERATE_EXPORT_HEADER() generates macro names in a file
name determined by the name of the library. This means that in the
simplest case, users of GenerateExportHeader will be equivalent to:

set(CMAKE_CXX_VISIBILITY_PRESET hidden)
set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
add_library(somelib someclass.cpp)
generate_export_header(somelib)
install(TARGETS somelib DESTINATION ${LIBRARY_INSTALL_DIR})
install(FILES
someclass.h
${PROJECT_BINARY_DIR}/somelib_export.h DESTINATION ${INCLUDE_INSTALL_DIR}
)

And in the ABI header files:

#include "somelib_export.h"
class SOMELIB_EXPORT SomeClass {
...
};

The CMake fragment will generate a file in the
${CMAKE_CURRENT_BINARY_DIR} called somelib_export.h containing the
macros SOMELIB_EXPORT, SOMELIB_NO_EXPORT, SOMELIB_DEPRECATED,
SOMELIB_DEPRECATED_EXPORT and SOMELIB_DEPRECATED_NO_EXPORT. They will
be followed by content taken from the variable specified by the
CUSTOM_CONTENT_FROM_VARIABLE option, if any. The resulting file should
be installed with other headers in the library.

The BASE_NAME argument can be used to override the file name and the
names used for the macros:

add_library(somelib someclass.cpp)
generate_export_header(somelib
BASE_NAME other_name
)

Generates a file called other_name_export.h containing the macros
OTHER_NAME_EXPORT, OTHER_NAME_NO_EXPORT and OTHER_NAME_DEPRECATED etc.

The BASE_NAME may be overridden by specifying other options in the
function. For example:

add_library(somelib someclass.cpp)
generate_export_header(somelib
EXPORT_MACRO_NAME OTHER_NAME_EXPORT
)

creates the macro OTHER_NAME_EXPORT instead of SOMELIB_EXPORT, but
other macros and the generated file name is as default:

add_library(somelib someclass.cpp)
generate_export_header(somelib
DEPRECATED_MACRO_NAME KDE_DEPRECATED
)

creates the macro KDE_DEPRECATED instead of SOMELIB_DEPRECATED.

If LIBRARY_TARGET is a static library, macros are defined without
values.

If the same sources are used to create both a shared and a static
library, the uppercased symbol ${BASE_NAME}_STATIC_DEFINE should be
used when building the static library:

add_library(shared_variant SHARED ${lib_SRCS})
add_library(static_variant ${lib_SRCS})
generate_export_header(shared_variant BASE_NAME libshared_and_static)
set_target_properties(static_variant PROPERTIES
COMPILE_FLAGS -DLIBSHARED_AND_STATIC_STATIC_DEFINE)

This will cause the export macros to expand to nothing when building
the static library.

If DEFINE_NO_DEPRECATED is specified, then a macro
${BASE_NAME}_NO_DEPRECATED will be defined This macro can be used to
remove deprecated code from preprocessor output:

option(EXCLUDE_DEPRECATED "Exclude deprecated parts of the library" FALSE)
if (EXCLUDE_DEPRECATED)
set(NO_BUILD_DEPRECATED DEFINE_NO_DEPRECATED)
endif()
generate_export_header(somelib ${NO_BUILD_DEPRECATED})

And then in somelib:

class SOMELIB_EXPORT SomeClass
{
public:
#ifndef SOMELIB_NO_DEPRECATED
SOMELIB_DEPRECATED void oldMethod();
#endif
};

#ifndef SOMELIB_NO_DEPRECATED
void SomeClass::oldMethod() { }
#endif

If PREFIX_NAME is specified, the argument will be used as a prefix to
all generated macros.

For example:

generate_export_header(somelib PREFIX_NAME VTK_)

Generates the macros VTK_SOMELIB_EXPORT etc.

Added in version 3.1: Library target can be an OBJECT library.

Added in version 3.7: Added the CUSTOM_CONTENT_FROM_VARIABLE option.

Added in version 3.11: Added the INCLUDE_GUARD_NAME option.

ADD_COMPILER_EXPORT_FLAGS( [<output_variable>] )

Deprecated since version 3.0: Set the target properties
CXX_VISIBILITY_PRESET and VISIBILITY_INLINES_HIDDEN instead.

The ADD_COMPILER_EXPORT_FLAGS function adds -fvisibility=hidden to
CMAKE_CXX_FLAGS if supported, and is a no-op on Windows which does not
need extra compiler flags for exporting support. You may optionally
pass a single argument to ADD_COMPILER_EXPORT_FLAGS that will be
populated with the CXX_FLAGS required to enable visibility support for
the compiler/architecture in use.

GNUInstallDirs
Define GNU standard installation directories

Provides install directory variables as defined by the GNU Coding
Standards.

Result Variables
Inclusion of this module defines the following variables:

CMAKE_INSTALL_<dir>
Destination for files of a given type. This value may be passed to
the DESTINATION options of install() commands for the corresponding
file type. It should be a path relative to the installation prefix
so that it can be converted to an absolute path in a relocatable
way.

While absolute paths are allowed, they are not recommended as they
do not work with the cmake --install command's --prefix option, or
with the cpack installer generators. In particular, there is no need
to make paths absolute by prepending CMAKE_INSTALL_PREFIX; this
prefix is used by default if the DESTINATION is a relative path.

CMAKE_INSTALL_FULL_<dir>
The absolute path generated from the corresponding
CMAKE_INSTALL_<dir> value. If the value is not already an absolute
path, an absolute path is constructed typically by prepending the
value of the CMAKE_INSTALL_PREFIX variable. However, there are some
special cases as documented below.

These variables shouldn't be used in install() commands as they do
not work with the cmake --install command's --prefix option, or with
the cpack installer generators.

where <dir> is one of:

BINDIR user executables (bin)

SBINDIR
system admin executables (sbin)

LIBEXECDIR
program executables (libexec)

SYSCONFDIR
read-only single-machine data (etc)

SHAREDSTATEDIR
modifiable architecture-independent data (com)

LOCALSTATEDIR
modifiable single-machine data (var)

RUNSTATEDIR
Added in version 3.9: run-time variable data (LOCALSTATEDIR/run)

LIBDIR object code libraries (lib or lib64)

On Debian, this may be lib/<multiarch-tuple> when
CMAKE_INSTALL_PREFIX is /usr.

INCLUDEDIR
C header files (include)

OLDINCLUDEDIR
C header files for non-gcc (/usr/include)

DATAROOTDIR
read-only architecture-independent data root (share)

DATADIR
read-only architecture-independent data (DATAROOTDIR)

INFODIR
info documentation (DATAROOTDIR/info)

LOCALEDIR
locale-dependent data (DATAROOTDIR/locale)

MANDIR man documentation (DATAROOTDIR/man)

DOCDIR documentation root (DATAROOTDIR/doc/PROJECT_NAME)

If the includer does not define a value the above-shown default will be
used and the value will appear in the cache for editing by the user.

Special Cases
Added in version 3.4.

The following values of CMAKE_INSTALL_PREFIX are special:

/
For <dir> other than the SYSCONFDIR, LOCALSTATEDIR and RUNSTATEDIR,
the value of CMAKE_INSTALL_<dir> is prefixed with usr/ if it is not
user-specified as an absolute path. For example, the INCLUDEDIR
value include becomes usr/include. This is required by the GNU
Coding Standards, which state:
When building the complete GNU system, the prefix will be empty
and /usr will be a symbolic link to /.

/usr
For <dir> equal to SYSCONFDIR, LOCALSTATEDIR or RUNSTATEDIR, the
CMAKE_INSTALL_FULL_<dir> is computed by prepending just / to the
value of CMAKE_INSTALL_<dir> if it is not user-specified as an
absolute path. For example, the SYSCONFDIR value etc becomes /etc.
This is required by the GNU Coding Standards.

/opt/...
For <dir> equal to SYSCONFDIR, LOCALSTATEDIR or RUNSTATEDIR, the
CMAKE_INSTALL_FULL_<dir> is computed by appending the prefix to the
value of CMAKE_INSTALL_<dir> if it is not user-specified as an
absolute path. For example, the SYSCONFDIR value etc becomes
/etc/opt/.... This is defined by the Filesystem Hierarchy Standard.

This behavior does not apply to paths under /opt/homebrew/....

Macros

GNUInstallDirs_get_absolute_install_dir

GNUInstallDirs_get_absolute_install_dir(absvar var dirname)

Added in version 3.7.

Set the given variable absvar to the absolute path contained
within the variable var. This is to allow the computation of an
absolute path, accounting for all the special cases documented
above. While this macro is used to compute the various
CMAKE_INSTALL_FULL_<dir> variables, it is exposed publicly to
allow users who create additional path variables to also compute
absolute paths where necessary, using the same logic. dirname
is the directory name to get, e.g. BINDIR.

Changed in version 3.20: Added the <dirname> parameter.
Previous versions of CMake passed this value through the
variable ${dir}.

GoogleTest
Added in version 3.9.

This module defines functions to help use the Google Test
infrastructure. Two mechanisms for adding tests are provided.
gtest_add_tests() has been around for some time, originally via
find_package(GTest). gtest_discover_tests() was introduced in CMake
3.10.

The (older) gtest_add_tests() scans source files to identify tests.
This is usually effective, with some caveats, including in
cross-compiling environments, and makes setting additional properties
on tests more convenient. However, its handling of parameterized tests
is less comprehensive, and it requires re-running CMake to detect
changes to the list of tests.

The (newer) gtest_discover_tests() discovers tests by asking the
compiled test executable to enumerate its tests. This is more robust
and provides better handling of parameterized tests, and does not
require CMake to be re-run when tests change. However, it may not work
in a cross-compiling environment, and setting test properties is less
convenient.

More details can be found in the documentation of the respective
functions.

Both commands are intended to replace use of add_test() to register
tests, and will create a separate CTest test for each Google Test test
case. Note that this is in some cases less efficient, as common set-up
and tear-down logic cannot be shared by multiple test cases executing
in the same instance. However, it provides more fine-grained pass/fail
information to CTest, which is usually considered as more beneficial.
By default, the CTest test name is the same as the Google Test name
(i.e. suite.testcase); see also TEST_PREFIX and TEST_SUFFIX.

gtest_add_tests
Automatically add tests with CTest by scanning source code for
Google Test macros:

gtest_add_tests(TARGET target
[SOURCES src1...]
[EXTRA_ARGS args...]
[WORKING_DIRECTORY dir]
[TEST_PREFIX prefix]
[TEST_SUFFIX suffix]
[SKIP_DEPENDENCY]
[TEST_LIST outVar]
)

gtest_add_tests attempts to identify tests by scanning source
files. Although this is generally effective, it uses only a
basic regular expression match, which can be defeated by
atypical test declarations, and is unable to fully "split"
parameterized tests. Additionally, it requires that CMake be
re-run to discover any newly added, removed or renamed tests (by
default, this means that CMake is re-run when any test source
file is changed, but see SKIP_DEPENDENCY). However, it has the
advantage of declaring tests at CMake time, which somewhat
simplifies setting additional properties on tests, and always
works in a cross-compiling environment.

The options are:

TARGET target
Specifies the Google Test executable, which must be a
known CMake executable target. CMake will substitute the
location of the built executable when running the test.

SOURCES src1...
When provided, only the listed files will be scanned for
test cases. If this option is not given, the SOURCES
property of the specified target will be used to obtain
the list of sources.

EXTRA_ARGS args...
Any extra arguments to pass on the command line to each
test case.

Changed in version 3.31: Empty values in args... are
preserved, see CMP0178.

WORKING_DIRECTORY dir
Specifies the directory in which to run the discovered
test cases. If this option is not provided, the current
binary directory is used.

TEST_PREFIX prefix
Specifies a prefix to be prepended to the name of each
discovered test case. This can be useful when the same
source files are being used in multiple calls to
gtest_add_test() but with different EXTRA_ARGS.

TEST_SUFFIX suffix
Similar to TEST_PREFIX except the suffix is appended to
the name of every discovered test case. Both TEST_PREFIX
and TEST_SUFFIX may be specified.

SKIP_DEPENDENCY
Normally, the function creates a dependency which will
cause CMake to be re-run if any of the sources being
scanned are changed. This is to ensure that the list of
discovered tests is updated. If this behavior is not
desired (as may be the case while actually writing the
test cases), this option can be used to prevent the
dependency from being added.

TEST_LIST outVar
The variable named by outVar will be populated in the
calling scope with the list of discovered test cases.
This allows the caller to do things like manipulate test
properties of the discovered tests.

Changed in version 3.31: Empty values in the TEST_LAUNCHER and
CROSSCOMPILING_EMULATOR target properties are preserved, see
policy CMP0178.

Usage example:

include(GoogleTest)
add_executable(FooTest FooUnitTest.cxx)
gtest_add_tests(TARGET FooTest
TEST_SUFFIX .noArgs
TEST_LIST noArgsTests
)
gtest_add_tests(TARGET FooTest
EXTRA_ARGS --someArg someValue
TEST_SUFFIX .withArgs
TEST_LIST withArgsTests
)
set_tests_properties(${noArgsTests} PROPERTIES TIMEOUT 10)
set_tests_properties(${withArgsTests} PROPERTIES TIMEOUT 20)

For backward compatibility, the following form is also
supported:

gtest_add_tests(exe args files...)

exe The path to the test executable or the name of a CMake
target.

args A ;-list of extra arguments to be passed to executable.
The entire list must be passed as a single argument.
Enclose it in quotes, or pass "" for no arguments.

files...
A list of source files to search for tests and test
fixtures. Alternatively, use AUTO to specify that exe is
the name of a CMake executable target whose sources
should be scanned.

include(GoogleTest)
set(FooTestArgs --foo 1 --bar 2)
add_executable(FooTest FooUnitTest.cxx)
gtest_add_tests(FooTest "${FooTestArgs}" AUTO)

gtest_discover_tests
Automatically add tests with CTest by querying the compiled test
executable for available tests:

gtest_discover_tests(target
[EXTRA_ARGS args...]
[WORKING_DIRECTORY dir]
[TEST_PREFIX prefix]
[TEST_SUFFIX suffix]
[TEST_FILTER expr]
[NO_PRETTY_TYPES] [NO_PRETTY_VALUES]
[PROPERTIES name1 value1...]
[TEST_LIST var]
[DISCOVERY_TIMEOUT seconds]
[XML_OUTPUT_DIR dir]
[DISCOVERY_MODE <POST_BUILD|PRE_TEST>]
[DISCOVERY_EXTRA_ARGS args...]
)

Added in version 3.10.

gtest_discover_tests() sets up a post-build or pre-test command
on the test executable that generates the list of tests by
parsing the output from running the test executable with the
--gtest_list_tests argument. Compared to the source parsing
approach of gtest_add_tests(), this ensures that the full list
of tests, including instantiations of parameterized tests, is
obtained. Since test discovery occurs at build or test time, it
is not necessary to re-run CMake when the list of tests changes.
However, it requires that CROSSCOMPILING_EMULATOR is properly
set in order to function in a cross-compiling environment.

Additionally, setting properties on tests is somewhat less
convenient, since the tests are not available at CMake time.
Additional test properties may be assigned to the set of tests
as a whole using the PROPERTIES option. If more fine-grained
test control is needed, custom content may be provided through
an external CTest script using the TEST_INCLUDE_FILES directory
property. The set of discovered tests is made accessible to
such a script via the <target>_TESTS variable (see the TEST_LIST
option below for further discussion and limitations).

The options are:

target Specifies the Google Test executable, which must be a
known CMake executable target. CMake will substitute the
location of the built executable when running the test.

EXTRA_ARGS args...
Any extra arguments to pass on the command line to each
test case.

Changed in version 3.31: Empty values in args... are
preserved, see CMP0178.

WORKING_DIRECTORY dir
Specifies the directory in which to run the discovered
test cases. If this option is not provided, the current
binary directory is used.

TEST_PREFIX prefix
Specifies a prefix to be prepended to the name of each
discovered test case. This can be useful when the same
test executable is being used in multiple calls to
gtest_discover_tests() but with different EXTRA_ARGS.

TEST_SUFFIX suffix
Similar to TEST_PREFIX except the suffix is appended to
the name of every discovered test case. Both TEST_PREFIX
and TEST_SUFFIX may be specified.

TEST_FILTER expr
Added in version 3.22.

Filter expression to pass as a --gtest_filter argument
during test discovery. Note that the expression is a
wildcard-based format that matches against the original
test names as used by gtest. For type or
value-parameterized tests, these names may be different
to the potentially pretty-printed test names that ctest
uses.

NO_PRETTY_TYPES
By default, the type index of type-parameterized tests is
replaced by the actual type name in the CTest test name.
If this behavior is undesirable (e.g. because the type
names are unwieldy), this option will suppress this
behavior.

NO_PRETTY_VALUES
By default, the value index of value-parameterized tests
is replaced by the actual value in the CTest test name.
If this behavior is undesirable (e.g. because the value
strings are unwieldy), this option will suppress this
behavior.

PROPERTIES name1 value1...
Specifies additional properties to be set on all tests
discovered by this invocation of gtest_discover_tests().

TEST_LIST var
Make the list of tests available in the variable var,
rather than the default <target>_TESTS. This can be
useful when the same test executable is being used in
multiple calls to gtest_discover_tests(). Note that this
variable is only available in CTest.

Due to a limitation of CMake's parsing rules, any test
with a square bracket in its name will be omitted from
the list of tests stored in this variable. Such tests
will still be defined and executed by ctest as normal
though.

DISCOVERY_TIMEOUT num
Added in version 3.10.3.

Specifies how long (in seconds) CMake will wait for the
test to enumerate available tests. If the test takes
longer than this, discovery (and your build) will fail.
Most test executables will enumerate their tests very
quickly, but under some exceptional circumstances, a test
may require a longer timeout. The default is 5. See
also the TIMEOUT option of execute_process().

NOTE:
In CMake versions 3.10.1 and 3.10.2, this option was
called TIMEOUT. This clashed with the TIMEOUT test
property, which is one of the common properties that
would be set with the PROPERTIES keyword, usually
leading to legal but unintended behavior. The keyword
was changed to DISCOVERY_TIMEOUT in CMake 3.10.3 to
address this problem. The ambiguous behavior of the
TIMEOUT keyword in 3.10.1 and 3.10.2 has not been
preserved.

XML_OUTPUT_DIR dir
Added in version 3.18.

If specified, the parameter is passed along with
--gtest_output=xml: to test executable. The actual file
name is the same as the test target, including prefix and
suffix. This should be used instead of EXTRA_ARGS
--gtest_output=xml to avoid race conditions writing the
XML result output when using parallel test execution.

DISCOVERY_MODE
Added in version 3.18.

Provides greater control over when gtest_discover_tests()
performs test discovery. By default, POST_BUILD sets up a
post-build command to perform test discovery at build
time. In certain scenarios, like cross-compiling, this
POST_BUILD behavior is not desirable. By contrast,
PRE_TEST delays test discovery until just prior to test
execution. This way test discovery occurs in the target
environment where the test has a better chance at finding
appropriate runtime dependencies.

DISCOVERY_MODE defaults to the value of the
CMAKE_GTEST_DISCOVER_TESTS_DISCOVERY_MODE variable if it
is not passed when calling gtest_discover_tests(). This
provides a mechanism for globally selecting a preferred
test discovery behavior without having to modify each
call site.

DISCOVERY_EXTRA_ARGS args...
Added in version 3.31.

Any extra arguments to pass on the command line for the
discovery command.

Added in version 3.29: The TEST_LAUNCHER target property is
honored during test discovery and test execution.

Changed in version 3.31: Empty values in the TEST_LAUNCHER and
CROSSCOMPILING_EMULATOR target properties are preserved, see
policy CMP0178.

InstallRequiredSystemLibraries
Include this module to search for compiler-provided system runtime
libraries and add install rules for them. Some optional variables may
be set prior to including the module to adjust behavior:

CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS
Specify additional runtime libraries that may not be detected.
After inclusion any detected libraries will be appended to this.

CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP
Set to TRUE to skip calling the install(PROGRAMS) command to
allow the includer to specify its own install rule, using the
value of CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS to get the list of
libraries.

CMAKE_INSTALL_DEBUG_LIBRARIES
Set to TRUE to install the debug runtime libraries when
available with MSVC tools.

CMAKE_INSTALL_DEBUG_LIBRARIES_ONLY
Set to TRUE to install only the debug runtime libraries with
MSVC tools even if the release runtime libraries are also
available.

CMAKE_INSTALL_UCRT_LIBRARIES
Added in version 3.6.

Set to TRUE to install the Windows Universal CRT libraries for
app-local deployment (e.g. to Windows XP). This is meaningful
only with MSVC from Visual Studio 2015 or higher.

Added in version 3.9: One may set a CMAKE_WINDOWS_KITS_10_DIR
environment variable to an absolute path to tell CMake to look
for Windows 10 SDKs in a custom location. The specified
directory is expected to contain Redist/ucrt/DLLs/* directories.

CMAKE_INSTALL_MFC_LIBRARIES
Set to TRUE to install the MSVC MFC runtime libraries.

CMAKE_INSTALL_OPENMP_LIBRARIES
Set to TRUE to install the MSVC OpenMP runtime libraries

CMAKE_INSTALL_SYSTEM_RUNTIME_DESTINATION
Specify the install(PROGRAMS) command DESTINATION option. If
not specified, the default is bin on Windows and lib elsewhere.

CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_NO_WARNINGS
Set to TRUE to disable warnings about required library files
that do not exist. (For example, Visual Studio Express editions
may not provide the redistributable files.)

CMAKE_INSTALL_SYSTEM_RUNTIME_COMPONENT
Added in version 3.3.

Specify the install(PROGRAMS) command COMPONENT option. If not
specified, no such option will be used.

Added in version 3.10: Support for installing Intel compiler runtimes.

ProcessorCount
ProcessorCount(var)

Determine the number of processors/cores and save value in ${var}

Sets the variable named ${var} to the number of physical cores
available on the machine if the information can be determined.
Otherwise it is set to 0. Currently this functionality is implemented
for AIX, cygwin, FreeBSD, HPUX, Linux, macOS, QNX, Sun and Windows.

Changed in version 3.15: On Linux, returns the container CPU count
instead of the host CPU count.

This function is guaranteed to return a positive integer (>=1) if it
succeeds. It returns 0 if there's a problem determining the processor
count.

More generally accurate physical CPU count can be obtained via
cmake_host_system_information():

cmake_host_system_information(RESULT N
QUERY NUMBER_OF_PHYSICAL_CORES)

Example use, in a ctest -S dashboard script:

include(ProcessorCount)
ProcessorCount(N)
if(NOT N EQUAL 0)
set(CTEST_BUILD_FLAGS -j${N})
set(ctest_test_args ${ctest_test_args} PARALLEL_LEVEL ${N})
endif()

This function is intended to offer an approximation of the value of the
number of compute cores available on the current machine, such that you
may use that value for parallel building and parallel testing. It is
meant to help utilize as much of the machine as seems reasonable. Of
course, knowledge of what else might be running on the machine
simultaneously should be used when deciding whether to request a
machine's full capacity all for yourself.

SelectLibraryConfigurations

select_library_configurations(basename)

This macro takes a library base name as an argument, and will choose
good values for the variables

basename_LIBRARY
basename_LIBRARIES
basename_LIBRARY_DEBUG
basename_LIBRARY_RELEASE

depending on what has been found and set.

If only basename_LIBRARY_RELEASE is defined, basename_LIBRARY will be
set to the release value, and basename_LIBRARY_DEBUG will be set to
basename_LIBRARY_DEBUG-NOTFOUND. If only basename_LIBRARY_DEBUG is
defined, then basename_LIBRARY will take the debug value, and
basename_LIBRARY_RELEASE will be set to
basename_LIBRARY_RELEASE-NOTFOUND.

If the generator supports configuration types, then basename_LIBRARY
and basename_LIBRARIES will be set with debug and optimized flags
specifying the library to be used for the given configuration. If no
build type has been set or the generator in use does not support
configuration types, then basename_LIBRARY and basename_LIBRARIES will
take only the release value, or the debug value if the release one is
not set.

SquishTestScript
This script launches a GUI test using Squish. You should not call the
script directly; instead, you should access it via the SQUISH_ADD_TEST
macro that is defined in FindSquish.cmake.

This script starts the Squish server, launches the test on the client,
and finally stops the squish server. If any of these steps fail
(including if the tests do not pass) then a fatal error is raised.

TestForANSIForScope
Check for ANSI for scope support

Check if the compiler restricts the scope of variables declared in a
for-init-statement to the loop body.

CMAKE_NO_ANSI_FOR_SCOPE - holds result

TestForANSIStreamHeaders
Test for compiler support of ANSI stream headers iostream, etc.

check if the compiler supports the standard ANSI iostream header
(without the .h)

CMAKE_NO_ANSI_STREAM_HEADERS - defined by the results

TestForSSTREAM
Test for compiler support of ANSI sstream header

check if the compiler supports the standard ANSI sstream header

CMAKE_NO_ANSI_STRING_STREAM - defined by the results

TestForSTDNamespace
Test for std:: namespace support

check if the compiler supports std:: on stl classes

CMAKE_NO_STD_NAMESPACE - defined by the results

UseEcos
This module defines variables and macros required to build eCos
application.

This file contains the following macros:

ECOS_ADD_INCLUDE_DIRECTORIES()
add the eCos include dirs

ECOS_ADD_EXECUTABLE(name source1 ... sourceN )
create an eCos executable

ECOS_ADJUST_DIRECTORY(VAR source1 ... sourceN )
adjusts the path of the source files and puts the result into
VAR

Macros for selecting the toolchain:

ECOS_USE_ARM_ELF_TOOLS()
enable the ARM ELF toolchain for the directory where it is
called

ECOS_USE_I386_ELF_TOOLS()
enable the i386 ELF toolchain for the directory where it is
called

ECOS_USE_PPC_EABI_TOOLS()
enable the PowerPC toolchain for the directory where it is
called

It contains the following variables:

ECOS_DEFINITIONS

ECOSCONFIG_EXECUTABLE

ECOS_CONFIG_FILE
defaults to ecos.ecc, if your eCos configuration file has a
different name, adjust this variable for internal use only:

ECOS_ADD_TARGET_LIB

UseJava
This file provides support for Java. It is assumed that FindJava has
already been loaded. See FindJava for information on how to load Java
into your CMake project.

Synopsis

Creating and Installing JARS
add_jar (<target_name> [SOURCES] <source1> [<source2>...] ...)
install_jar (<target_name> DESTINATION <destination> [COMPONENT <component>])
install_jni_symlink (<target_name> DESTINATION <destination> [COMPONENT <component>])

Header Generation
create_javah ((TARGET <target> | GENERATED_FILES <VAR>) CLASSES <class>... ...)

Exporting JAR Targets
install_jar_exports (TARGETS <jars>... FILE <filename> DESTINATION <destination> ...)
export_jars (TARGETS <jars>... [NAMESPACE <namespace>] FILE <filename>)

Finding JARs
find_jar (<VAR> NAMES <name1> [<name2>...] [PATHS <path1> [<path2>... ENV <var>]] ...)

Creating Java Documentation
create_javadoc (<VAR> (PACKAGES <pkg1> [<pkg2>...] | FILES <file1> [<file2>...]) ...)

Creating And Installing JARs

add_jar
Creates a jar file containing java objects and, optionally,
resources:

add_jar(<target_name>
[SOURCES] <source1> [<source2>...] [<resource1>...]
[RESOURCES NAMESPACE <ns1> <resource1>... [NAMESPACE <nsX> <resourceX>...]... ]
[INCLUDE_JARS <jar1> [<jar2>...]]
[ENTRY_POINT <entry>]
[VERSION <version>]
[MANIFEST <manifest>]
[OUTPUT_NAME <name>]
[OUTPUT_DIR <dir>]
[GENERATE_NATIVE_HEADERS <target>
[DESTINATION (<dir>|INSTALL <dir> [BUILD <dir>])]]
)

This command creates a <target_name>.jar. It compiles the given
<source> files and adds the given <resource> files to the jar
file. Source files can be java files or listing files (prefixed
by @). If only resource files are given then just a jar file is
created.

SOURCES
Compiles the specified source files and adds the result
in the jar file.

Added in version 3.4: Support for response files,
prefixed by @.

RESOURCES
Added in version 3.21.

Adds the named <resource> files to the jar by stripping
the source file path and placing the file beneath <ns>
within the jar.

For example:

RESOURCES NAMESPACE "/com/my/namespace" "a/path/to/resource.txt"

results in a resource accessible via
/com/my/namespace/resource.txt within the jar.

Resources may be added without adjusting the namespace by
adding them to the list of SOURCES (original behavior),
in this case, resource paths must be relative to
CMAKE_CURRENT_SOURCE_DIR. Adding resources without using
the RESOURCES parameter in out of source builds will
almost certainly result in confusion.

NOTE:
Adding resources via the SOURCES parameter relies upon
a hard-coded list of file extensions which are tested
to determine whether they compile (e.g. File.java).
SOURCES files which match the extensions are compiled.
Files which do not match are treated as resources. To
include uncompiled resources matching those file
extensions use the RESOURCES parameter.

INCLUDE_JARS
The list of jars are added to the classpath when
compiling the java sources and also to the dependencies
of the target. INCLUDE_JARS also accepts other target
names created by add_jar(). For backwards compatibility,
jar files listed as sources are ignored (as they have
been since the first version of this module).

ENTRY_POINT
Defines an entry point in the jar file.

VERSION
Adds a version to the target output name.

The following example will create a jar file with the
name shibboleet-1.2.0.jar and will create a symlink
shibboleet.jar pointing to the jar with the version
information.

add_jar(shibboleet shibbotleet.java VERSION 1.2.0)

MANIFEST
Defines a custom manifest for the jar.

OUTPUT_NAME
Specify a different output name for the target.

OUTPUT_DIR
Sets the directory where the jar file will be generated.
If not specified, CMAKE_CURRENT_BINARY_DIR is used as the
output directory.

GENERATE_NATIVE_HEADERS
Added in version 3.11.

Generates native header files for methods declared as
native. These files provide the connective glue that
allow your Java and C code to interact. An INTERFACE
target will be created for an easy usage of generated
files. Sub-option DESTINATION can be used to specify the
output directory for generated header files.

This option requires, at least, version 1.8 of the JDK.

For an optimum usage of this option, it is recommended to
include module JNI before any call to add_jar(). The
produced target for native headers can then be used to
compile C/C++ sources with the target_link_libraries()
command.

find_package(JNI)
add_jar(foo foo.java GENERATE_NATIVE_HEADERS foo-native)
add_library(bar bar.cpp)
target_link_libraries(bar PRIVATE foo-native)

Added in version 3.20: DESTINATION sub-option now
supports the possibility to specify different output
directories for BUILD and INSTALL steps. If BUILD
directory is not specified, a default directory will be
used.

To export the interface target generated by
GENERATE_NATIVE_HEADERS option, sub-option INSTALL of
DESTINATION is required:

add_jar(foo foo.java GENERATE_NATIVE_HEADERS foo-native
DESTINATION INSTALL include)
install(TARGETS foo-native EXPORT native)
install(DIRECTORY "$<TARGET_PROPERTY:foo-native,NATIVE_HEADERS_DIRECTORY>/"
DESTINATION include)
install(EXPORT native DESTINATION /to/export NAMESPACE foo)

Some variables can be set to customize the behavior of add_jar()
as well as the java compiler:

CMAKE_JAVA_COMPILE_FLAGS
Specify additional flags to java compiler.

CMAKE_JAVA_INCLUDE_PATH
Specify additional paths to the class path.

CMAKE_JNI_TARGET
If the target is a JNI library, sets this boolean
variable to TRUE to enable creation of a JNI symbolic
link (see also install_jni_symlink()).

CMAKE_JAR_CLASSES_PREFIX
If multiple jars should be produced from the same java
source filetree, to prevent the accumulation of duplicate
class files in subsequent jars, set/reset
CMAKE_JAR_CLASSES_PREFIX prior to calling the add_jar():

set(CMAKE_JAR_CLASSES_PREFIX com/redhat/foo)
add_jar(foo foo.java)

set(CMAKE_JAR_CLASSES_PREFIX com/redhat/bar)
add_jar(bar bar.java)

The add_jar() function sets the following target properties on
<target_name>:

INSTALL_FILES
The files which should be installed. This is used by
install_jar().

JNI_SYMLINK
The JNI symlink which should be installed. This is used
by install_jni_symlink().

JAR_FILE
The location of the jar file so that you can include it.

CLASSDIR
The directory where the class files can be found. For
example to use them with javah.

NATIVE_HEADERS_DIRECTORY
Added in version 3.20.

The directory where native headers are generated. Defined
when option GENERATE_NATIVE_HEADERS is specified.

install_jar
This command installs the jar file to the given destination:

install_jar(<target_name> <destination>)
install_jar(<target_name> DESTINATION <destination> [COMPONENT <component>])

This command installs the <target_name> file to the given
<destination>. It should be called in the same scope as
add_jar() or it will fail.

Added in version 3.4: The second signature with DESTINATION and
COMPONENT options.

DESTINATION
Specify the directory on disk to which a file will be
installed.

COMPONENT
Specify an installation component name with which the
install rule is associated, such as "runtime" or
"development".

The install_jar() command sets the following target properties
on <target_name>:

INSTALL_DESTINATION
Holds the <destination> as described above, and is used
by install_jar_exports().

install_jni_symlink
Installs JNI symlinks for target generated by add_jar():

install_jni_symlink(<target_name> <destination>)
install_jni_symlink(<target_name> DESTINATION <destination> [COMPONENT <component>])

This command installs the <target_name> JNI symlinks to the
given <destination>. It should be called in the same scope as
add_jar() or it will fail.

Added in version 3.4: The second signature with DESTINATION and
COMPONENT options.

DESTINATION
Specify the directory on disk to which a file will be
installed.

COMPONENT
Specify an installation component name with which the
install rule is associated, such as "runtime" or
"development".

Utilize the following commands to create a JNI symbolic link:

set(CMAKE_JNI_TARGET TRUE)
add_jar(shibboleet shibbotleet.java VERSION 1.2.0)
install_jar(shibboleet ${LIB_INSTALL_DIR}/shibboleet)
install_jni_symlink(shibboleet ${JAVA_LIB_INSTALL_DIR})

Header Generation

create_javah
Added in version 3.4.

Generates C header files for java classes:

create_javah(TARGET <target> | GENERATED_FILES <VAR>
CLASSES <class>...
[CLASSPATH <classpath>...]
[DEPENDS <depend>...]
[OUTPUT_NAME <path>|OUTPUT_DIR <path>]
)

Deprecated since version 3.11: This command will no longer be
supported starting with version 10 of the JDK due to the
suppression of javah tool. The add_jar(GENERATE_NATIVE_HEADERS)
command should be used instead.

Create C header files from java classes. These files provide the
connective glue that allow your Java and C code to interact.

There are two main signatures for create_javah(). The first
signature returns generated files through variable specified by
the GENERATED_FILES option. For example:

create_javah(GENERATED_FILES files_headers
CLASSES org.cmake.HelloWorld
CLASSPATH hello.jar
)

The second signature for create_javah() creates a target which
encapsulates header files generation. E.g.

create_javah(TARGET target_headers
CLASSES org.cmake.HelloWorld
CLASSPATH hello.jar
)

Both signatures share same options.

CLASSES
Specifies Java classes used to generate headers.

CLASSPATH
Specifies various paths to look up classes. Here .class
files, jar files or targets created by command add_jar
can be used.

DEPENDS
Targets on which the javah target depends.

OUTPUT_NAME
Concatenates the resulting header files for all the
classes listed by option CLASSES into <path>. Same
behavior as option -o of javah tool.

OUTPUT_DIR
Sets the directory where the header files will be
generated. Same behavior as option -d of javah tool. If
not specified, CMAKE_CURRENT_BINARY_DIR is used as the
output directory.

Exporting JAR Targets

install_jar_exports
Added in version 3.7.

Installs a target export file:

install_jar_exports(TARGETS <jars>...
[NAMESPACE <namespace>]
FILE <filename>
DESTINATION <destination> [COMPONENT <component>])

This command installs a target export file <filename> for the
named jar targets to the given <destination> directory. Its
function is similar to that of install(EXPORT).

TARGETS
List of targets created by add_jar() command.

NAMESPACE
Added in version 3.9.

The <namespace> value will be prepend to the target names
as they are written to the import file.

FILE Specify name of the export file.

DESTINATION
Specify the directory on disk to which a file will be
installed.

COMPONENT
Specify an installation component name with which the
install rule is associated, such as "runtime" or
"development".

export_jars
Added in version 3.7.

Writes a target export file:

export_jars(TARGETS <jars>...
[NAMESPACE <namespace>]
FILE <filename>)

This command writes a target export file <filename> for the
named <jars> targets. Its function is similar to that of
export().

TARGETS
List of targets created by add_jar() command.

NAMESPACE
Added in version 3.9.

The <namespace> value will be prepend to the target names
as they are written to the import file.

FILE Specify name of the export file.

Finding JARs

find_jar
Finds the specified jar file:

find_jar(<VAR>
<name> | NAMES <name1> [<name2>...]
[PATHS <path1> [<path2>... ENV <var>]]
[VERSIONS <version1> [<version2>]]
[DOC "cache documentation string"]
)

This command is used to find a full path to the named jar. A
cache entry named by <VAR> is created to store the result of
this command. If the full path to a jar is found the result is
stored in the variable and the search will not repeated unless
the variable is cleared. If nothing is found, the result will
be <VAR>-NOTFOUND, and the search will be attempted again next
time find_jar() is invoked with the same variable.

NAMES Specify one or more possible names for the jar file.

PATHS Specify directories to search in addition to the default
locations. The ENV var sub-option reads paths from a
system environment variable.

VERSIONS
Specify jar versions.

DOC Specify the documentation string for the <VAR> cache
entry.

Creating Java Documentation

create_javadoc
Creates java documentation based on files and packages:

create_javadoc(<VAR>
(PACKAGES <pkg1> [<pkg2>...] | FILES <file1> [<file2>...])
[SOURCEPATH <sourcepath>]
[CLASSPATH <classpath>]
[INSTALLPATH <install path>]
[DOCTITLE <the documentation title>]
[WINDOWTITLE <the title of the document>]
[AUTHOR (TRUE|FALSE)]
[USE (TRUE|FALSE)]
[VERSION (TRUE|FALSE)]
)

The create_javadoc() command can be used to create java
documentation. There are two main signatures for
create_javadoc().

The first signature works with package names on a path with
source files:

create_javadoc(my_example_doc
PACKAGES com.example.foo com.example.bar
SOURCEPATH "${CMAKE_CURRENT_SOURCE_DIR}"
CLASSPATH ${CMAKE_JAVA_INCLUDE_PATH}
WINDOWTITLE "My example"
DOCTITLE "<h1>My example</h1>"
AUTHOR TRUE
USE TRUE
VERSION TRUE
)

The second signature for create_javadoc() works on a given list
of files:

create_javadoc(my_example_doc
FILES java/A.java java/B.java
CLASSPATH ${CMAKE_JAVA_INCLUDE_PATH}
WINDOWTITLE "My example"
DOCTITLE "<h1>My example</h1>"
AUTHOR TRUE
USE TRUE
VERSION TRUE
)

Both signatures share most of the options. For more details
please read the javadoc manpage.

PACKAGES
Specify java packages.

FILES Specify java source files. If relative paths are
specified, they are relative to CMAKE_CURRENT_SOURCE_DIR.

SOURCEPATH
Specify the directory where to look for packages. By
default, CMAKE_CURRENT_SOURCE_DIR directory is used.

CLASSPATH
Specify where to find user class files. Same behavior as
option -classpath of javadoc tool.

INSTALLPATH
Specify where to install the java documentation. If you
specified, the documentation will be installed to
${CMAKE_INSTALL_PREFIX}/share/javadoc/<VAR>.

DOCTITLE
Specify the title to place near the top of the overview
summary file. Same behavior as option -doctitle of
javadoc tool.

WINDOWTITLE
Specify the title to be placed in the HTML <title> tag.
Same behavior as option -windowtitle of javadoc tool.

AUTHOR When value TRUE is specified, includes the @author text
in the generated docs. Same behavior as option -author
of javadoc tool.

USE When value TRUE is specified, creates class and package
usage pages. Includes one Use page for each documented
class and package. Same behavior as option -use of
javadoc tool.

VERSION
When value TRUE is specified, includes the version text
in the generated docs. Same behavior as option -version
of javadoc tool.

UseSWIG
This file provides support for SWIG. It is assumed that FindSWIG module
has already been loaded.

CMake Commands
The following command is defined for use with SWIG:

swig_add_library
Added in version 3.8.

Define swig module with given name and specified language:

swig_add_library(<name>
[TYPE <SHARED|MODULE|STATIC|USE_BUILD_SHARED_LIBS>]
LANGUAGE <language>
[NO_PROXY]
[OUTPUT_DIR <directory>]
[OUTFILE_DIR <directory>]
SOURCES <file>...
)

Targets created with the swig_add_library command have the same
capabilities as targets created with the add_library() command,
so those targets can be used with any command expecting a target
(e.g. target_link_libraries()).

Changed in version 3.13: This command creates a target with the
specified <name> when policy CMP0078 is set to NEW. Otherwise,
the legacy behavior will choose a different target name and
store it in the SWIG_MODULE_<name>_REAL_NAME variable.

Changed in version 3.15: Alternate library name (set with the
OUTPUT_NAME property, for example) will be passed on to Python
and CSharp wrapper libraries.

Changed in version 3.21: Generated library use standard naming
conventions for CSharp language when policy CMP0122 is set to
NEW. Otherwise, the legacy behavior is applied.

NOTE:
For multi-config generators, this module does not support
configuration-specific files generated by SWIG. All build
configurations must result in the same generated source file.

NOTE:
For Makefile Generators, if, for some sources, the
USE_SWIG_DEPENDENCIES property is FALSE, swig_add_library
does not track file dependencies, so depending on the
<name>_swig_compilation custom target is required for targets
which require the swig-generated files to exist. Other
generators may depend on the source files that would be
generated by SWIG.

TYPE SHARED, MODULE and STATIC have the same semantic as for
the add_library() command. If USE_BUILD_SHARED_LIBS is
specified, the library type will be STATIC or SHARED
based on whether the current value of the
BUILD_SHARED_LIBS variable is ON. If no type is
specified, MODULE will be used.

LANGUAGE
Specify the target language.

Added in version 3.1: Go and Lua language support.

Added in version 3.2: R language support.

Added in version 3.18: Fortran language support.

NO_PROXY
Added in version 3.12.

Prevent the generation of the wrapper layer (swig
-noproxy option).

OUTPUT_DIR
Added in version 3.12.

Specify where to write the language specific files (swig
-outdir option). If not given, the CMAKE_SWIG_OUTDIR
variable will be used. If neither is specified, the
default depends on the value of the
UseSWIG_MODULE_VERSION variable as follows:

o If UseSWIG_MODULE_VERSION is 1 or is undefined, output
is written to the CMAKE_CURRENT_BINARY_DIR directory.

o If UseSWIG_MODULE_VERSION is 2, a dedicated directory
will be used. The path of this directory can be
retrieved from the SWIG_SUPPORT_FILES_DIRECTORY target
property.

OUTFILE_DIR
Added in version 3.12.

Specify an output directory name where the generated
source file will be placed (swig -o option). If not
specified, the SWIG_OUTFILE_DIR variable will be used. If
neither is specified, OUTPUT_DIR or CMAKE_SWIG_OUTDIR is
used instead.

SOURCES
List of sources for the library. Files with extension .i
will be identified as sources for the SWIG tool. Other
files will be handled in the standard way.

Added in version 3.14: This behavior can be overridden by
specifying the variable SWIG_SOURCE_FILE_EXTENSIONS.

NOTE:
If UseSWIG_MODULE_VERSION is set to 2, it is strongly
recommended to use a dedicated directory unique to the target
when either the OUTPUT_DIR option or the CMAKE_SWIG_OUTDIR
variable are specified. The output directory contents are
erased as part of the target build, so to prevent
interference between targets or losing other important files,
each target should have its own dedicated output directory.

Properties on Source Files
Source file properties on module files must be set before the
invocation of the swig_add_library command to specify special behavior
of SWIG and ensure generated files will receive the required settings.

CPLUSPLUS
Call SWIG in c++ mode. For example:

set_property(SOURCE mymod.i PROPERTY CPLUSPLUS ON)
swig_add_library(mymod LANGUAGE python SOURCES mymod.i)

SWIG_FLAGS
Deprecated since version 3.12: Replaced with the fine-grained
properties that follow.

Pass custom flags to the SWIG executable.

INCLUDE_DIRECTORIES, COMPILE_DEFINITIONS and COMPILE_OPTIONS
Added in version 3.12.

Add custom flags to SWIG compiler and have same semantic as
properties INCLUDE_DIRECTORIES, COMPILE_DEFINITIONS and
COMPILE_OPTIONS.

USE_TARGET_INCLUDE_DIRECTORIES
Added in version 3.13.

If set to TRUE, contents of target property INCLUDE_DIRECTORIES
will be forwarded to SWIG compiler. If set to FALSE target
property INCLUDE_DIRECTORIES will be ignored. If not set, target
property SWIG_USE_TARGET_INCLUDE_DIRECTORIES will be considered.

GENERATED_INCLUDE_DIRECTORIES, GENERATED_COMPILE_DEFINITIONS and
GENERATED_COMPILE_OPTIONS
Added in version 3.12.

Add custom flags to the C/C++ generated source. They will fill,
respectively, properties INCLUDE_DIRECTORIES,
COMPILE_DEFINITIONS and COMPILE_OPTIONS of generated C/C++ file.

DEPENDS
Added in version 3.12.

Specify additional dependencies to the source file.

USE_SWIG_DEPENDENCIES
Added in version 3.20.

If set to TRUE, implicit dependencies are generated by the swig
tool itself. This property is only meaningful for Makefile,
Ninja, Xcode, and Visual Studio generators. Default value is
FALSE.

Added in version 3.21: Added the support of Xcode generator.

Added in version 3.22: Added the support of Visual Studio
Generators.

SWIG_MODULE_NAME
Specify the actual import name of the module in the target
language. This is required if it cannot be scanned
automatically from source or different from the module file
basename. For example:

set_property(SOURCE mymod.i PROPERTY SWIG_MODULE_NAME mymod_realname)

Changed in version 3.14: If policy CMP0086 is set to NEW,
-module <module_name> is passed to SWIG compiler.

OUTPUT_DIR
Added in version 3.19.

Specify where to write the language specific files (swig -outdir
option) for the considered source file. If not specified, the
other ways to define the output directory applies (see
OUTPUT_DIR option of swig_add_library() command).

OUTFILE_DIR
Added in version 3.19.

Specify an output directory where the generated source file will
be placed (swig -o option) for the considered source file. If
not specified, OUTPUT_DIR source property will be used. If
neither are specified, the other ways to define output file
directory applies (see OUTFILE_DIR option of swig_add_library()
command).

Properties on Targets
Target library properties can be set to apply same configuration to all
SWIG input files.

SWIG_INCLUDE_DIRECTORIES, SWIG_COMPILE_DEFINITIONS and
SWIG_COMPILE_OPTIONS
Added in version 3.12.

These properties will be applied to all SWIG input files and
have same semantic as target properties INCLUDE_DIRECTORIES,
COMPILE_DEFINITIONS and COMPILE_OPTIONS.

set (UseSWIG_TARGET_NAME_PREFERENCE STANDARD)
swig_add_library(mymod LANGUAGE python SOURCES mymod.i)
set_property(TARGET mymod PROPERTY SWIG_COMPILE_DEFINITIONS MY_DEF1 MY_DEF2)
set_property(TARGET mymod PROPERTY SWIG_COMPILE_OPTIONS -bla -blb)

SWIG_USE_TARGET_INCLUDE_DIRECTORIES
Added in version 3.13.

If set to TRUE, contents of target property INCLUDE_DIRECTORIES
will be forwarded to SWIG compiler. If set to FALSE or not
defined, target property INCLUDE_DIRECTORIES will be ignored.
This behavior can be overridden by specifying source property
USE_TARGET_INCLUDE_DIRECTORIES.

SWIG_GENERATED_INCLUDE_DIRECTORIES, SWIG_GENERATED_COMPILE_DEFINITIONS
and SWIG_GENERATED_COMPILE_OPTIONS
Added in version 3.12.

These properties will populate, respectively, properties
INCLUDE_DIRECTORIES, COMPILE_DEFINITIONS and COMPILE_FLAGS of
all generated C/C++ files.

SWIG_DEPENDS
Added in version 3.12.

Add dependencies to all SWIG input files.

Read-only Target Properties
The following target properties are output properties and can be used
to get information about support files generated by SWIG interface
compilation.

SWIG_SUPPORT_FILES
Added in version 3.12.

This output property list of wrapper files generated during SWIG
compilation.

set (UseSWIG_TARGET_NAME_PREFERENCE STANDARD)
swig_add_library(mymod LANGUAGE python SOURCES mymod.i)
get_property(support_files TARGET mymod PROPERTY SWIG_SUPPORT_FILES)

NOTE:
Only most principal support files are listed. In case some
advanced features of SWIG are used (for example %template),
associated support files may not be listed. Prefer to use the
SWIG_SUPPORT_FILES_DIRECTORY property to handle support
files.

SWIG_SUPPORT_FILES_DIRECTORY
Added in version 3.12.

This output property specifies the directory where support files
will be generated.

NOTE:
When source property OUTPUT_DIR is defined, multiple
directories can be specified as part of
SWIG_SUPPORT_FILES_DIRECTORY.

CMake Variables
Some variables can be set to customize the behavior of swig_add_library
as well as SWIG:

UseSWIG_MODULE_VERSION
Added in version 3.12.

Specify different behaviors for UseSWIG module.

o Set to 1 or undefined: Legacy behavior is applied.

o Set to 2: A new strategy is applied regarding support files:
the output directory of support files is erased before SWIG
interface compilation.

CMAKE_SWIG_FLAGS
Add flags to all swig calls.

CMAKE_SWIG_OUTDIR
Specify where to write the language specific files (swig -outdir
option).

SWIG_OUTFILE_DIR
Added in version 3.8.

Specify an output directory name where the generated source file
will be placed. If not specified, CMAKE_SWIG_OUTDIR is used.

SWIG_MODULE_<name>_EXTRA_DEPS
Specify extra dependencies for the generated module for <name>.

SWIG_SOURCE_FILE_EXTENSIONS
Added in version 3.14.

Specify a list of source file extensions to override the default
behavior of considering only .i files as sources for the SWIG
tool. For example:

set(SWIG_SOURCE_FILE_EXTENSIONS ".i" ".swg")

SWIG_USE_SWIG_DEPENDENCIES
Added in version 3.20.

If set to TRUE, implicit dependencies are generated by the swig
tool itself. This variable is only meaningful for Makefile,
Ninja, Xcode, and Visual Studio generators. Default value is
FALSE.

Source file property USE_SWIG_DEPENDENCIES, if not defined, will
be initialized with the value of this variable.

Added in version 3.21: Added the support of Xcode generator.

Added in version 3.22: Added the support of Visual Studio
Generators.

Deprecated Commands

swig_link_libraries
Deprecated since version 3.13: Use target_link_libraries() with
the standard target name, or with
${SWIG_MODULE_<name>_REAL_NAME} for legacy target naming.

Link libraries to swig module:

swig_link_libraries(<name> <item>...)

This command has same capabilities as target_link_libraries()
command.

NOTE:
When policy CMP0078 is set to NEW, swig_add_library() creates
a standard target with the specified <name> and
target_link_libraries() must be used instead of this command.

With the legacy behavior (when CMP0078 is set to OLD and the
UseSWIG_TARGET_NAME_PREFERENCE variable is set to "LEGACY",
or in CMake versions prior to 3.12), it is preferable to use
target_link_libraries(${SWIG_MODULE_<name>_REAL_NAME} ...)
instead of this command.

UsewxWidgets
Convenience include for using wxWidgets library.

Determines if wxWidgets was FOUND and sets the appropriate libs,
incdirs, flags, etc. INCLUDE_DIRECTORIES and LINK_DIRECTORIES are
called.

USAGE

# Note that for MinGW users the order of libs is important!
find_package(wxWidgets REQUIRED net gl core base)
include(${wxWidgets_USE_FILE})
# and for each of your dependent executable/library targets:
target_link_libraries(<YourTarget> ${wxWidgets_LIBRARIES})

DEPRECATED

LINK_LIBRARIES is not called in favor of adding dependencies per target.

AUTHOR

Jan Woetzel <jw -at- mip.informatik.uni-kiel.de>

FIND MODULES

These modules search for third-party software. They are normally
called through the find_package() command.

FindALSA
Find Advanced Linux Sound Architecture (ALSA)

Find the alsa libraries (asound)

IMPORTED Targets
Added in version 3.12.

This module defines IMPORTED target ALSA::ALSA, if ALSA has been found.

Result Variables
This module defines the following variables:

ALSA_FOUND
True if ALSA_INCLUDE_DIR & ALSA_LIBRARY are found

ALSA_LIBRARIES
List of libraries when using ALSA.

ALSA_INCLUDE_DIRS
Where to find the ALSA headers.

Cache variables
The following cache variables may also be set:

ALSA_INCLUDE_DIR
the ALSA include directory

ALSA_LIBRARY
the absolute path of the asound library

FindArmadillo
Find the Armadillo C++ library. Armadillo is a library for linear
algebra & scientific computing.

Added in version 3.18: Support for linking wrapped libraries directly
(ARMA_DONT_USE_WRAPPER).

Using Armadillo:

find_package(Armadillo REQUIRED)
include_directories(${ARMADILLO_INCLUDE_DIRS})
add_executable(foo foo.cc)
target_link_libraries(foo ${ARMADILLO_LIBRARIES})

This module sets the following variables:

ARMADILLO_FOUND - set to true if the library is found
ARMADILLO_INCLUDE_DIRS - list of required include directories
ARMADILLO_LIBRARIES - list of libraries to be linked
ARMADILLO_VERSION_MAJOR - major version number
ARMADILLO_VERSION_MINOR - minor version number
ARMADILLO_VERSION_PATCH - patch version number
ARMADILLO_VERSION_STRING - version number as a string (ex: "1.0.4")
ARMADILLO_VERSION_NAME - name of the version (ex: "Antipodean Antileech")

FindASPELL
Try to find ASPELL

Once done this will define

ASPELL_FOUND - system has ASPELL
ASPELL_EXECUTABLE - the ASPELL executable
ASPELL_INCLUDE_DIR - the ASPELL include directory
ASPELL_LIBRARIES - The libraries needed to use ASPELL
ASPELL_DEFINITIONS - Compiler switches required for using ASPELL

FindAVIFile
Locate AVIFILE library and include paths.

AVIFILE is a set of libraries for i386 machines to use various AVI
codecs. Support is limited beyond Linux. Windows provides native AVI
support, and so doesn't need this library. This module defines

AVIFILE_INCLUDE_DIR, where to find avifile.h , etc.
AVIFILE_LIBRARIES, the libraries to link against
AVIFILE_DEFINITIONS, definitions to use when compiling
AVIFILE_FOUND, If false, don't try to use AVIFILE

FindBacktrace
Find provider for backtrace(3).

Checks if OS supports backtrace(3) via either libc or custom library.
This module defines the following variables:

Backtrace_HEADER
The header file needed for backtrace(3). Cached. Could be
forcibly set by user.

Backtrace_INCLUDE_DIRS
The include directories needed to use backtrace(3) header.

Backtrace_LIBRARIES
The libraries (linker flags) needed to use backtrace(3), if any.

Backtrace_FOUND
Is set if and only if backtrace(3) support detected.

The following cache variables are also available to set or use:

Backtrace_LIBRARY
The external library providing backtrace, if any.

Backtrace_INCLUDE_DIR
The directory holding the backtrace(3) header.

Typical usage is to generate of header file using configure_file() with
the contents like the following:

#cmakedefine01 Backtrace_FOUND
#if Backtrace_FOUND
# include <${Backtrace_HEADER}>
#endif

And then reference that generated header file in actual source.

Imported Targets
Added in version 3.30.

This module defines the following IMPORTED targets:

Backtrace::Backtrace
An interface library providing usage requirements for the found
components.

FindBISON
Find bison executable and provide a macro to generate custom build
rules.

The module defines the following variables:

BISON_EXECUTABLE
path to the bison program

BISON_VERSION
version of bison

BISON_FOUND
"True" if the program was found

The minimum required version of bison can be specified using the
standard CMake syntax, e.g. find_package(BISON 2.1.3).

If bison is found, the module defines the macro:

BISON_TARGET(<Name> <YaccInput> <CodeOutput>
[COMPILE_FLAGS <flags>]
[DEFINES_FILE <file>]
[VERBOSE [<file>]]
[REPORT_FILE <file>]
)

which will create a custom rule to generate a parser. <YaccInput> is
the path to a yacc file. <CodeOutput> is the name of the source file
generated by bison. A header file is also be generated, and contains
the token list.

Changed in version 3.14: When CMP0088 is set to NEW, bison runs in the
CMAKE_CURRENT_BINARY_DIR directory.

The options are:

COMPILE_FLAGS <flags>
Specify flags to be added to the bison command line.

DEFINES_FILE <file>
Added in version 3.4.

Specify a non-default header <file> to be generated by bison.

VERBOSE [<file>]
Tell bison to write a report file of the grammar and parser.

Deprecated since version 3.7: If <file> is given, it specifies
path the report file is copied to. [<file>] is left for
backward compatibility of this module. Use VERBOSE REPORT_FILE
<file>.

REPORT_FILE <file>
Added in version 3.7.

Specify a non-default report <file>, if generated.

The macro defines the following variables:

BISON_<Name>_DEFINED
True is the macro ran successfully

BISON_<Name>_INPUT
The input source file, an alias for <YaccInput>

BISON_<Name>_OUTPUT_SOURCE
The source file generated by bison

BISON_<Name>_OUTPUT_HEADER
The header file generated by bison

BISON_<Name>_OUTPUTS
All files generated by bison including the source, the header
and the report

BISON_<Name>_COMPILE_FLAGS
Options used in the bison command line

Example usage:

find_package(BISON)
BISON_TARGET(MyParser parser.y ${CMAKE_CURRENT_BINARY_DIR}/parser.cpp
DEFINES_FILE ${CMAKE_CURRENT_BINARY_DIR}/parser.h)
add_executable(Foo main.cpp ${BISON_MyParser_OUTPUTS})

FindBLAS
Find Basic Linear Algebra Subprograms (BLAS) library

This module finds an installed Fortran library that implements the BLAS
linear-algebra interface.

At least one of the C, CXX, or Fortran languages must be enabled.

Input Variables
The following variables may be set to influence this module's behavior:

BLA_STATIC
if ON use static linkage

BLA_VENDOR
Set to one of the BLAS/LAPACK Vendors to search for BLAS only
from the specified vendor. If not set, all vendors are
considered.

BLA_F95
if ON tries to find the BLAS95 interfaces

BLA_PREFER_PKGCONFIG
Added in version 3.11.

if set pkg-config will be used to search for a BLAS library
first and if one is found that is preferred

BLA_PKGCONFIG_BLAS
Added in version 3.25.

If set, the pkg-config method will look for this module name
instead of just blas.

BLA_SIZEOF_INTEGER
Added in version 3.22.

Specify the BLAS/LAPACK library integer size:

4 Search for a BLAS/LAPACK with 32-bit integer interfaces.

8 Search for a BLAS/LAPACK with 64-bit integer interfaces.

ANY Search for any BLAS/LAPACK. Most likely, a BLAS/LAPACK
with 32-bit integer interfaces will be found.

Imported targets
This module defines the following IMPORTED targets:

BLAS::BLAS
Added in version 3.18.

The libraries to use for BLAS, if found.

Result Variables
This module defines the following variables:

BLAS_FOUND
library implementing the BLAS interface is found

BLAS_LINKER_FLAGS
uncached list of required linker flags (excluding -l and -L).

BLAS_LIBRARIES
uncached list of libraries (using full path name) to link
against to use BLAS (may be empty if compiler implicitly links
BLAS)

BLAS95_LIBRARIES
uncached list of libraries (using full path name) to link
against to use BLAS95 interface

BLAS95_FOUND
library implementing the BLAS95 interface is found

BLAS/LAPACK Vendors

Generic
Generic reference implementation

ACML, ACML_MP, ACML_GPU
AMD Core Math Library

AOCL, AOCL_mt
Added in version 3.27.

AMD Optimizing CPU Libraries

Apple, NAS
Apple BLAS (Accelerate), and Apple NAS (vecLib)

Arm, Arm_mp, Arm_ilp64, Arm_ilp64_mp
Added in version 3.18.

Arm Performance Libraries

ATLAS Automatically Tuned Linear Algebra Software

CXML, DXML
Compaq/Digital Extended Math Library

EML, EML_mt
Added in version 3.20.

Elbrus Math Library

FLAME Added in version 3.11.

BLIS Framework

FlexiBLAS
Added in version 3.19.

Fujitsu_SSL2, Fujitsu_SSL2BLAMP, Fujitsu_SSL2SVE, Fujitsu_SSL2BLAMPSVE
Added in version 3.20.

Fujitsu SSL2 serial and parallel blas/lapack with SVE
instructions

Goto GotoBLAS

IBMESSL, IBMESSL_SMP
IBM Engineering and Scientific Subroutine Library

Intel Intel MKL 32 bit and 64 bit obsolete versions

Intel10_32
Intel MKL v10 32 bit, threaded code

Intel10_64lp
Intel MKL v10+ 64 bit, threaded code, lp64 model

Intel10_64lp_seq
Intel MKL v10+ 64 bit, sequential code, lp64 model

Intel10_64ilp
Added in version 3.13.

Intel MKL v10+ 64 bit, threaded code, ilp64 model

Intel10_64ilp_seq
Added in version 3.13.

Intel MKL v10+ 64 bit, sequential code, ilp64 model

Intel10_64_dyn
Added in version 3.17.

Intel MKL v10+ 64 bit, single dynamic library

libblastrampoline
Added in version 3.30.

A BLAS/LAPACK demuxing library using PLT trampolines

NVHPC Added in version 3.21.

NVIDIA HPC SDK

OpenBLAS
Added in version 3.6.

PhiPACK
Portable High Performance ANSI C (PHiPAC)

SCSL, SCSL_mp
Scientific Computing Software Library

SGIMATH
SGI Scientific Mathematical Library

SunPerf
Sun Performance Library

Intel MKL
To use the Intel MKL implementation of BLAS, a project must enable at
least one of the C or CXX languages. Set BLA_VENDOR to an Intel MKL
variant either on the command-line as -DBLA_VENDOR=Intel10_64lp or in
project code:

set(BLA_VENDOR Intel10_64lp)
find_package(BLAS)

In order to build a project using Intel MKL, and end user must first
establish an Intel MKL environment:

Intel oneAPI
Source the full Intel environment script:

. /opt/intel/oneapi/setvars.sh

Or, source the MKL component environment script:

. /opt/intel/oneapi/mkl/latest/env/vars.sh

Intel Classic
Source the full Intel environment script:

. /opt/intel/bin/compilervars.sh intel64

Or, source the MKL component environment script:

. /opt/intel/mkl/bin/mklvars.sh intel64

The above environment scripts set the MKLROOT environment variable to
the top of the MKL installation. They also add the location of the
runtime libraries to the dynamic library loader environment variable
for your platform (e.g. LD_LIBRARY_PATH). This is necessary for
programs linked against MKL to run.

NOTE:
As of Intel oneAPI 2021.2, loading only the MKL component does not
make all of its dependencies available. In particular, the iomp5
library must be available separately, or provided by also loading
the compiler component environment:

. /opt/intel/oneapi/compiler/latest/env/vars.sh

FindBullet
Try to find the Bullet physics engine

This module defines the following variables

BULLET_FOUND - Was bullet found
BULLET_INCLUDE_DIRS - the Bullet include directories
BULLET_LIBRARIES - Link to this, by default it includes
all bullet components (Dynamics,
Collision, LinearMath, & SoftBody)

This module accepts the following variables

BULLET_ROOT - Can be set to bullet install path or Windows build path

FindBZip2
Try to find BZip2

IMPORTED Targets
Added in version 3.12.

This module defines IMPORTED target BZip2::BZip2, if BZip2 has been
found.

Result Variables
This module defines the following variables:

BZIP2_FOUND
system has BZip2

BZIP2_INCLUDE_DIRS
Added in version 3.12: the BZip2 include directories

BZIP2_LIBRARIES
Link these to use BZip2

BZIP2_NEED_PREFIX
this is set if the functions are prefixed with BZ2_

BZIP2_VERSION
Added in version 3.26: the version of BZip2 found.

See also legacy variable BZIP2_VERSION_STRING.

Cache variables
The following cache variables may also be set:

BZIP2_INCLUDE_DIR
the directory containing the BZip2 headers

BZIP2_LIBRARY_RELEASE
the path to the BZip2 library for release configurations

BZIP2_LIBRARY_DEBUG
the path to the BZip2 library for debug configurations

Legacy Variables
The following variables are provided for backward compatibility:

BZIP2_VERSION_STRING
the version of BZip2 found.

Changed in version 3.26: Superseded by BZIP2_VERSION.

FindCABLE
Find CABLE

This module finds if CABLE is installed and determines where the
include files and libraries are. This code sets the following
variables:

CABLE the path to the cable executable
CABLE_TCL_LIBRARY the path to the Tcl wrapper library
CABLE_INCLUDE_DIR the path to the include directory

To build Tcl wrappers, you should add shared library and link it to
${CABLE_TCL_LIBRARY}. You should also add ${CABLE_INCLUDE_DIR} as an
include directory.

FindCoin3D
Find Coin3D (Open Inventor)

Coin3D is an implementation of the Open Inventor API. It provides data
structures and algorithms for 3D visualization.

This module defines the following variables

COIN3D_FOUND - system has Coin3D - Open Inventor
COIN3D_INCLUDE_DIRS - where the Inventor include directory can be found
COIN3D_LIBRARIES - Link to this to use Coin3D

FindCUDAToolkit
Added in version 3.17.

This script locates the NVIDIA CUDA toolkit and the associated
libraries, but does not require the CUDA language be enabled for a
given project. This module does not search for the NVIDIA CUDA Samples.

Added in version 3.19: QNX support.

Search Behavior
The CUDA Toolkit search behavior uses the following order:

1. If the CUDA language has been enabled we will use the directory
containing the compiler as the first search location for nvcc.

2. If the variable CMAKE_CUDA_COMPILER or the environment variable
CUDACXX is defined, it will be used as the path to the nvcc
executable.

3. If the CUDAToolkit_ROOT cmake configuration variable (e.g.,
-DCUDAToolkit_ROOT=/some/path) or environment variable is defined,
it will be searched. If both an environment variable and a
configuration variable are specified, the configuration variable
takes precedence.

The directory specified here must be such that the executable nvcc
or the appropriate version.txt or version.json file can be found
underneath the specified directory.

4. If the CUDA_PATH environment variable is defined, it will be
searched for nvcc.

5. The user's path is searched for nvcc using find_program(). If this
is found, no subsequent search attempts are performed. Users are
responsible for ensuring that the first nvcc to show up in the path
is the desired path in the event that multiple CUDA Toolkits are
installed.

6. On Unix systems, if the symbolic link /usr/local/cuda exists, this
is used. No subsequent search attempts are performed. No default
symbolic link location exists for the Windows platform.

7. The platform specific default install locations are searched. If
exactly one candidate is found, this is used. The default CUDA
Toolkit install locations searched are:

NOTE:
When multiple CUDA Toolkits are installed in the default location
of a system (e.g., both /usr/local/cuda-9.0 and
/usr/local/cuda-10.0 exist but the /usr/local/cuda symbolic link
does not exist), this package is marked as not found.

There are too many factors involved in making an automatic
decision in the presence of multiple CUDA Toolkits being
installed. In this situation, users are encouraged to either (1)
set CUDAToolkit_ROOT or (2) ensure that the correct nvcc
executable shows up in $PATH for find_program() to find.

Arguments

[<version>]
The [<version>] argument requests a version with which the
package found should be compatible. See find_package version
format for more details.

Options

REQUIRED
If specified, configuration will error if a suitable CUDA
Toolkit is not found.

QUIET If specified, the search for a suitable CUDA Toolkit will not
produce any messages.

EXACT If specified, the CUDA Toolkit is considered found only if the
exact VERSION specified is recovered.

Imported targets
An imported target named CUDA::toolkit is provided.

This module defines IMPORTED targets for each of the following
libraries that are part of the CUDAToolkit:

o CUDA Runtime Library

o CUDA Driver Library

o cuBLAS

o cuDLA

o cuFile

o cuFFT

o cuRAND

o cuSOLVER

o cuSPARSE

o cuPTI

o NPP

o nvBLAS

o nvGRAPH

o nvJPEG

o nvidia-ML

o nvPTX Compiler

o nvRTC

o nvJitLink

o nvFatBin

o nvToolsExt

o nvtx3

o OpenCL

o cuLIBOS

CUDA Runtime Library
The CUDA Runtime library (cudart) are what most applications will
typically need to link against to make any calls such as cudaMalloc,
and cudaFree.

Targets Created:

o CUDA::cudart

o CUDA::cudart_static

CUDA Driver Library
The CUDA Driver library (cuda) are used by applications that use calls
such as cuMemAlloc, and cuMemFree.

Targets Created:

o CUDA::cuda_driver

cuBLAS
The cuBLAS library.

Targets Created:

o CUDA::cublas

o CUDA::cublas_static

o CUDA::cublasLt starting in CUDA 10.1

o CUDA::cublasLt_static starting in CUDA 10.1

cuDLA
Added in version 3.27.

The NVIDIA Tegra Deep Learning Accelerator cuDLA library.

Targets Created:

o CUDA::cudla starting in CUDA 11.6

cuFile
Added in version 3.25.

The NVIDIA GPUDirect Storage cuFile library.

Targets Created:

o CUDA::cuFile starting in CUDA 11.4

o CUDA::cuFile_static starting in CUDA 11.4

o CUDA::cuFile_rdma starting in CUDA 11.4

o CUDA::cuFile_rdma_static starting in CUDA 11.4

cuFFT
The cuFFT library.

Targets Created:

o CUDA::cufft

o CUDA::cufftw

o CUDA::cufft_static

o CUDA::cufft_static_nocallback starting in CUDA 9.2, requires CMake
3.23+

o CUDA::cufftw_static

cuRAND
The cuRAND library.

Targets Created:

o CUDA::curand

o CUDA::curand_static

cuSOLVER
The cuSOLVER library.

Targets Created:

o CUDA::cusolver

o CUDA::cusolver_static

cuSPARSE
The cuSPARSE library.

Targets Created:

o CUDA::cusparse

o CUDA::cusparse_static

cupti
The NVIDIA CUDA Profiling Tools Interface.

Targets Created:

o CUDA::cupti

o CUDA::cupti_static

Added in version 3.27:

o CUDA::nvperf_host starting in CUDA 10.2

o CUDA::nvperf_host_static starting in CUDA 10.2

o CUDA::nvperf_target starting in CUDA 10.2

o CUDA::pcsamplingutil starting in CUDA 11.3

NPP
The NPP libraries.

Targets Created:

o nppc:

o CUDA::nppc

o CUDA::nppc_static

o nppial: Arithmetic and logical operation functions in
nppi_arithmetic_and_logical_operations.h

o CUDA::nppial

o CUDA::nppial_static

o nppicc: Color conversion and sampling functions in
nppi_color_conversion.h

o CUDA::nppicc

o CUDA::nppicc_static

o nppicom: JPEG compression and decompression functions in
nppi_compression_functions.h Removed starting in CUDA 11.0, use
nvJPEG instead.

o CUDA::nppicom

o CUDA::nppicom_static

o nppidei: Data exchange and initialization functions in
nppi_data_exchange_and_initialization.h

o CUDA::nppidei

o CUDA::nppidei_static

o nppif: Filtering and computer vision functions in
nppi_filter_functions.h

o CUDA::nppif

o CUDA::nppif_static

o nppig: Geometry transformation functions found in
nppi_geometry_transforms.h

o CUDA::nppig

o CUDA::nppig_static

o nppim: Morphological operation functions found in
nppi_morphological_operations.h

o CUDA::nppim

o CUDA::nppim_static

o nppist: Statistics and linear transform in
nppi_statistics_functions.h and nppi_linear_transforms.h

o CUDA::nppist

o CUDA::nppist_static

o nppisu: Memory support functions in nppi_support_functions.h

o CUDA::nppisu

o CUDA::nppisu_static

o nppitc: Threshold and compare operation functions in
nppi_threshold_and_compare_operations.h

o CUDA::nppitc

o CUDA::nppitc_static

o npps:

o CUDA::npps

o CUDA::npps_static

nvBLAS
The nvBLAS libraries. This is a shared library only.

Targets Created:

o CUDA::nvblas

nvGRAPH
The nvGRAPH library. Removed starting in CUDA 11.0

Targets Created:

o CUDA::nvgraph

o CUDA::nvgraph_static

nvJPEG
The nvJPEG library. Introduced in CUDA 10.

Targets Created:

o CUDA::nvjpeg

o CUDA::nvjpeg_static

nvPTX Compiler
Added in version 3.25.

The nvPTX (PTX Compilation) library. The PTX Compiler APIs are a set
of APIs which can be used to compile a PTX program into GPU assembly
code. Introduced in CUDA 11.1 This is a static library only.

Targets Created:

o CUDA::nvptxcompiler_static starting in CUDA 11.1

nvRTC
The nvRTC (Runtime Compilation) library.

Targets Created:

o CUDA::nvrtc

Added in version 3.26:

o CUDA::nvrtc_builtins

o CUDA::nvrtc_static starting in CUDA 11.5

o CUDA::nvrtc_builtins_static starting in CUDA 11.5

nvJitLink
The nvJItLink (Runtime LTO Linking) library.

Targets Created:

o CUDA::nvJitLink starting in CUDA 12.0

o CUDA::nvJitLink_static starting in CUDA 12.0

nvFatBin
Added in version 3.30.

The nvFatBin (Runtime fatbin creation) library.

Targets Created:

o CUDA::nvfatbin starting in CUDA 12.4

o CUDA::nvfatbin_static starting in CUDA 12.4

nvidia-ML
The NVIDIA Management Library.

Targets Created:

o CUDA::nvml

o CUDA::nvml_static starting in CUDA 12.4

Added in version 3.31: Added CUDA::nvml_static.

nvToolsExt
Deprecated since version 3.25: With CUDA 10.0+, use nvtx3.

The NVIDIA Tools Extension. This is a shared library only.

Targets Created:

o CUDA::nvToolsExt

nvtx3
Added in version 3.25.

The header-only NVIDIA Tools Extension Library. Introduced in CUDA
10.0.

Targets created:

o CUDA::nvtx3

OpenCL
The NVIDIA OpenCL Library. This is a shared library only.

Targets Created:

o CUDA::OpenCL

cuLIBOS
The cuLIBOS library is a backend thread abstraction layer library which
is static only. The CUDA::cublas_static, CUDA::cusparse_static,
CUDA::cufft_static, CUDA::curand_static, and (when implemented) NPP
libraries all automatically have this dependency linked.

Target Created:

o CUDA::culibos

Note: direct usage of this target by consumers should not be necessary.

Result variables

CUDAToolkit_FOUND
A boolean specifying whether or not the CUDA Toolkit was found.

CUDAToolkit_VERSION
The exact version of the CUDA Toolkit found (as reported by nvcc
--version, version.txt, or version.json).

CUDAToolkit_VERSION_MAJOR
The major version of the CUDA Toolkit.

CUDAToolkit_VERSION_MINOR
The minor version of the CUDA Toolkit.

CUDAToolkit_VERSION_PATCH
The patch version of the CUDA Toolkit.

CUDAToolkit_BIN_DIR
The path to the CUDA Toolkit library directory that contains the
CUDA executable nvcc.

CUDAToolkit_INCLUDE_DIRS
List of paths to all the CUDA Toolkit folders containing header
files required to compile a project linking against CUDA.

CUDAToolkit_LIBRARY_DIR
The path to the CUDA Toolkit library directory that contains the
CUDA Runtime library cudart.

CUDAToolkit_LIBRARY_ROOT
Added in version 3.18.

The path to the CUDA Toolkit directory containing the nvvm
directory and either version.txt or version.json.

CUDAToolkit_TARGET_DIR
The path to the CUDA Toolkit directory including the target
architecture when cross-compiling. When not cross-compiling this
will be equivalent to the parent directory of
CUDAToolkit_BIN_DIR.

CUDAToolkit_NVCC_EXECUTABLE
The path to the NVIDIA CUDA compiler nvcc. Note that this path
may not be the same as CMAKE_CUDA_COMPILER. nvcc must be found
to determine the CUDA Toolkit version as well as determining
other features of the Toolkit. This variable is set for the
convenience of modules that depend on this one.

FindCups
Find the Common UNIX Printing System (CUPS).

Set CUPS_REQUIRE_IPP_DELETE_ATTRIBUTE to TRUE if you need a version
which features this function (i.e. at least 1.1.19)

Imported targets
Added in version 3.15.

This module defines IMPORTED target Cups::Cups, if Cups has been found.

Result variables
This module will set the following variables in your project:

CUPS_FOUND
true if CUPS headers and libraries were found

CUPS_INCLUDE_DIRS
the directory containing the Cups headers

CUPS_LIBRARIES
the libraries to link against to use CUPS.

CUPS_VERSION_STRING
the version of CUPS found (since CMake 2.8.8)

Cache variables
The following cache variables may also be set:

CUPS_INCLUDE_DIR
the directory containing the Cups headers

FindCURL
Find the native CURL headers and libraries.

Added in version 3.14: This module accept optional COMPONENTS to check
supported features and protocols:

PROTOCOLS: ICT FILE FTP FTPS GOPHER HTTP HTTPS IMAP IMAPS LDAP LDAPS POP3
POP3S RTMP RTSP SCP SFTP SMB SMBS SMTP SMTPS TELNET TFTP
FEATURES: SSL IPv6 UnixSockets libz AsynchDNS IDN GSS-API PSL SPNEGO
Kerberos NTLM NTLM_WB TLS-SRP HTTP2 HTTPS-proxy

IMPORTED Targets
Added in version 3.12.

This module defines IMPORTED target CURL::libcurl, if curl has been
found.

Result Variables
This module defines the following variables:

CURL_FOUND
"True" if curl found.

CURL_INCLUDE_DIRS
where to find curl/curl.h, etc.

CURL_LIBRARIES
List of libraries when using curl.

CURL_VERSION_STRING
The version of curl found.

Added in version 3.13: Debug and Release variants are found separately.

CURL CMake
Added in version 3.17.

If CURL was built using the CMake buildsystem then it provides its own
CURLConfig.cmake file for use with the find_package() command's config
mode. This module looks for this file and, if found, returns its
results with no further action.

Set CURL_NO_CURL_CMAKE to ON to disable this search.

Hints
CURL_USE_STATIC_LIBS
Added in version 3.28.

Set to TRUE to use static libraries.

This is meaningful only when CURL is not found via its CMake Package
Configuration file.

FindCurses
Find the curses or ncurses include file and library.

Result Variables
This module defines the following variables:

CURSES_FOUND
True if Curses is found.

CURSES_INCLUDE_DIRS
The include directories needed to use Curses.

CURSES_LIBRARIES
The libraries needed to use Curses.

CURSES_CFLAGS
Added in version 3.16.

Parameters which ought be given to C/C++ compilers when using
Curses.

CURSES_HAVE_CURSES_H
True if curses.h is available.

CURSES_HAVE_NCURSES_H
True if ncurses.h is available.

CURSES_HAVE_NCURSES_NCURSES_H
True if ncurses/ncurses.h is available.

CURSES_HAVE_NCURSES_CURSES_H
True if ncurses/curses.h is available.

Set CURSES_NEED_NCURSES to TRUE before the find_package(Curses) call if
NCurses functionality is required.

Added in version 3.10: Set CURSES_NEED_WIDE to TRUE before the
find_package(Curses) call if unicode functionality is required.

Backward Compatibility
The following variable are provided for backward compatibility:

CURSES_INCLUDE_DIR
Path to Curses include. Use CURSES_INCLUDE_DIRS instead.

CURSES_LIBRARY
Path to Curses library. Use CURSES_LIBRARIES instead.

FindCVS
Find the Concurrent Versions System (CVS).

The module defines the following variables:

CVS_EXECUTABLE - path to cvs command line client
CVS_FOUND - true if the command line client was found

Example usage:

find_package(CVS)
if(CVS_FOUND)
message("CVS found: ${CVS_EXECUTABLE}")
endif()

FindCxxTest
Find CxxTest unit testing framework.

Find the CxxTest suite and declare a helper macro for creating unit
tests and integrating them with CTest.

Input Variables

CXXTEST_USE_PYTHON
Deprecated since version 1.3.

Only used in the case both Python & Perl are detected on the
system to control which CxxTest code generator is used. Valid
only for CxxTest version 3.

In older versions of this Find Module, this variable controlled
if the Python test generator was used instead of the Perl one,
regardless of which scripting language the user had installed.

CXXTEST_TESTGEN_ARGS
Added in version 2.8.3.

Specify a list of options to pass to the CxxTest code generator.
If not defined, --error-printer is passed.

Result Variables

CXXTEST_FOUND
True if the CxxTest framework was found

CXXTEST_INCLUDE_DIRS
Where to find the CxxTest include directory

CXXTEST_PERL_TESTGEN_EXECUTABLE
The perl-based test generator

CXXTEST_PYTHON_TESTGEN_EXECUTABLE
The python-based test generator

CXXTEST_TESTGEN_EXECUTABLE
Added in version 2.8.3.

The test generator that is actually used (chosen using user
preferences and interpreters found in the system)

CXXTEST_TESTGEN_INTERPRETER
Added in version 2.8.3.

The full path to the Perl or Python executable on the system, on
platforms where the script cannot be executed using its shebang
line.

Module Commands

cxxtest_add_test
Create a CxxTest runner and adds it to the CTest testing suite:

CXXTEST_ADD_TEST(<test_name> <gen_source_file>
<input_files_to_testgen>...)

Parameters:

test_name
The name of the test

gen_source_file
The generated source filename to be generated by CxxTest

input_files_to_testgen
The list of header files containing the
CxxTest::TestSuite's to be included in this runner

Example Usage
The following example, if CxxTest is found, will:

o Invoke the testgen executable to autogenerate foo_test.cc in the
binary tree from "foo_test.h" in the current source directory.

o Create an executable and test called unittest_foo.

find_package(CxxTest)
if(CXXTEST_FOUND)
include_directories(${CXXTEST_INCLUDE_DIR})
enable_testing()
CXXTEST_ADD_TEST(unittest_foo foo_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/foo_test.h)
target_link_libraries(unittest_foo foo) # as needed
endif()

foo_test.h contains:

#include <cxxtest/TestSuite.h>
class MyTestSuite : public CxxTest::TestSuite
{
public:
void testAddition( void )
{
TS_ASSERT( 1 + 1 > 1 );
TS_ASSERT_EQUALS( 1 + 1, 2 );
}
};

FindCygwin
Find Cygwin, a POSIX-compatible environment that runs natively on
Microsoft Windows

FindDCMTK
Find DICOM ToolKit (DCMTK) libraries and applications

The module defines the following variables:

DCMTK_INCLUDE_DIRS - Directories to include to use DCMTK
DCMTK_LIBRARIES - Files to link against to use DCMTK
DCMTK_FOUND - If false, don't try to use DCMTK
DCMTK_DIR - (optional) Source directory for DCMTK

Compatibility
This module is able to find a version of DCMTK that does or does not
export a DCMTKConfig.cmake file. It applies a two step process:

o Step 1: Attempt to find DCMTK version providing a DCMTKConfig.cmake
file.

o Step 2: If step 1 failed, rely on FindDCMTK.cmake to set DCMTK_*
variables details below.

Recent DCMTK provides a DCMTKConfig.cmake package configuration file.
To exclusively use the package configuration file (recommended when
possible), pass the NO_MODULE option to find_package(). For example,
find_package(DCMTK NO_MODULE). This requires official DCMTK snapshot
3.6.1_20140617 or newer.

Until all clients update to the more recent DCMTK, build systems will
need to support different versions of DCMTK.

On any given system, the following combinations of DCMTK versions could
be considered:

+-------+-----------------+-----------------+-------------+
| | SYSTEM DCMTK | LOCAL DCMTK | Supported ? |
+-------+-----------------+-----------------+-------------+
|Case A | NA | [ ] DCMTKConfig | YES |
+-------+-----------------+-----------------+-------------+
|Case B | NA | [X] DCMTKConfig | YES |
+-------+-----------------+-----------------+-------------+
|Case C | [ ] DCMTKConfig | NA | YES |
+-------+-----------------+-----------------+-------------+
|Case D | [X] DCMTKConfig | NA | YES |
+-------+-----------------+-----------------+-------------+
|Case E | [ ] DCMTKConfig | [ ] DCMTKConfig | YES (*) |
+-------+-----------------+-----------------+-------------+
|Case F | [X] DCMTKConfig | [ ] DCMTKConfig | NO |
+-------+-----------------+-----------------+-------------+
|Case G | [ ] DCMTKConfig | [X] DCMTKConfig | YES |
+-------+-----------------+-----------------+-------------+
|Case H | [X] DCMTKConfig | [X] DCMTKConfig | YES |
+-------+-----------------+-----------------+-------------+
(*) See Troubleshooting section.

Legend:
NA ...............: Means that no System or Local DCMTK is available

[ ] DCMTKConfig ..: Means that the version of DCMTK does NOT export
a DCMTKConfig.cmake file.

[X] DCMTKConfig ..: Means that the version of DCMTK exports a
DCMTKConfig.cmake file.

Troubleshooting
What to do if my project finds a different version of DCMTK?

Remove DCMTK entry from the CMake cache per find_package()
documentation.

FindDevIL
This module locates the Developer's Image Library, DevIL.

IMPORTED Targets
Added in version 3.21.

This module defines the IMPORTED targets:

DevIL::IL
Defined if the system has DevIL.

DevIL::ILU
Defined if the system has DevIL Utilities.

DevIL::ILUT
Defined if the system has DevIL Utility Toolkit.

Result Variables
This module sets:

IL_LIBRARIES
The name of the IL library. These include the full path to the
core DevIL library. This one has to be linked into the
application.

ILU_LIBRARIES
The name of the ILU library. Again, the full path. This library
is for filters and effects, not actual loading. It doesn't have
to be linked if the functionality it provides is not used.

ILUT_LIBRARIES
The name of the ILUT library. Full path. This part of the
library interfaces with OpenGL. It is not strictly needed in
applications.

IL_INCLUDE_DIR
where to find the il.h, ilu.h and ilut.h files.

DevIL_FOUND
This is set to TRUE if all the above variables were set. This
will be set to false if ILU or ILUT are not found, even if they
are not needed. In most systems, if one library is found all the
others are as well. That's the way the DevIL developers release
it.

DevIL_ILUT_FOUND
Added in version 3.21.

This is set to TRUE if the ILUT library is found.

FindDoxygen
Doxygen is a documentation generation tool (see
https://www.doxygen.nl). This module looks for Doxygen and some
optional tools it supports:

dot Graphviz dot utility used to render various graphs.

mscgen Message Chart Generator utility used by Doxygen's \msc and
\mscfile commands.

dia Dia the diagram editor used by Doxygen's \diafile command.

Added in version 3.9: These tools are available as components in the
find_package() command. For example:

# Require dot, treat the other components as optional
find_package(Doxygen
REQUIRED dot
OPTIONAL_COMPONENTS mscgen dia)

The following variables are defined by this module:

DOXYGEN_FOUND
True if the doxygen executable was found.

DOXYGEN_VERSION
The version reported by doxygen --version.

Added in version 3.9: The module defines IMPORTED targets for Doxygen
and each component found. These can be used as part of custom
commands, etc. and should be preferred over old-style (and now
deprecated) variables like DOXYGEN_EXECUTABLE. The following import
targets are defined if their corresponding executable could be found
(the component import targets will only be defined if that component
was requested):

Doxygen::doxygen
Doxygen::dot
Doxygen::mscgen
Doxygen::dia

Functions

doxygen_add_docs
Added in version 3.9.

This function is intended as a convenience for adding a target
for generating documentation with Doxygen. It aims to provide
sensible defaults so that projects can generally just provide
the input files and directories and that will be sufficient to
give sensible results. The function supports the ability to
customize the Doxygen configuration used to build the
documentation.

doxygen_add_docs(targetName
[filesOrDirs...]
[ALL]
[USE_STAMP_FILE]
[WORKING_DIRECTORY dir]
[COMMENT comment]
[CONFIG_FILE filename])

The function constructs a Doxyfile and defines a custom target
that runs Doxygen on that generated file. The listed files and
directories are used as the INPUT of the generated Doxyfile and
they can contain wildcards. Any files that are listed
explicitly will also be added as SOURCES of the custom target so
they will show up in an IDE project's source list.

So that relative input paths work as expected, by default the
working directory of the Doxygen command will be the current
source directory (i.e. CMAKE_CURRENT_SOURCE_DIR). This can be
overridden with the WORKING_DIRECTORY option to change the
directory used as the relative base point. Note also that
Doxygen's default behavior is to strip the working directory
from relative paths in the generated documentation (see the
STRIP_FROM_PATH Doxygen config option for details).

If provided, the optional comment will be passed as the COMMENT
for the add_custom_target() command used to create the custom
target internally.

Added in version 3.27: If CONFIG_FILE is set, the given file
provided with full-path will be used as doxygen configuration
file

Added in version 3.12: If ALL is set, the target will be added
to the default build target.

Added in version 3.16: If USE_STAMP_FILE is set, the custom
command defined by this function will create a stamp file with
the name <targetName>.stamp in the current binary directory
whenever doxygen is re-run. With this option present, all items
in <filesOrDirs> must be files (i.e. no directories, symlinks or
wildcards) and each of the files must exist at the time
doxygen_add_docs() is called. An error will be raised if any of
the items listed is missing or is not a file when USE_STAMP_FILE
is given. A dependency will be created on each of the files so
that doxygen will only be re-run if one of the files is updated.
Without the USE_STAMP_FILE option, doxygen will always be re-run
if the <targetName> target is built regardless of whether
anything listed in <filesOrDirs> has changed.

The contents of the generated Doxyfile can be customized by
setting CMake variables before calling doxygen_add_docs(). Any
variable with a name of the form DOXYGEN_<tag> will have its
value substituted for the corresponding <tag> configuration
option in the Doxyfile. See the Doxygen documentation for the
full list of supported configuration options.

Some of Doxygen's defaults are overridden to provide more
appropriate behavior for a CMake project. Each of the following
will be explicitly set unless the variable already has a value
before doxygen_add_docs() is called (with some exceptions
noted):

DOXYGEN_HAVE_DOT
Set to YES if the dot component was requested and it was
found, NO otherwise. Any existing value of
DOXYGEN_HAVE_DOT is ignored.

DOXYGEN_DOT_MULTI_TARGETS
Set to YES by this module (note that this requires a dot
version newer than 1.8.10). This option is only
meaningful if DOXYGEN_HAVE_DOT is also set to YES.

DOXYGEN_GENERATE_LATEX
Set to NO by this module.

DOXYGEN_WARN_FORMAT
For Visual Studio based generators, this is set to the
form recognized by the Visual Studio IDE: $file($line) :
$text. For all other generators, Doxygen's default value
is not overridden.

DOXYGEN_PROJECT_NAME
Populated with the name of the current project (i.e.
PROJECT_NAME).

DOXYGEN_PROJECT_NUMBER
Populated with the version of the current project (i.e.
PROJECT_VERSION).

DOXYGEN_PROJECT_BRIEF
Populated with the description of the current project
(i.e. PROJECT_DESCRIPTION).

DOXYGEN_INPUT
Projects should not set this variable. It will be
populated with the set of files and directories passed to
doxygen_add_docs(), thereby providing consistent behavior
with the other built-in commands like add_executable(),
add_library() and add_custom_target(). If a variable
named DOXYGEN_INPUT is set by the project, it will be
ignored and a warning will be issued.

DOXYGEN_RECURSIVE
Set to YES by this module.

DOXYGEN_EXCLUDE_PATTERNS
If the set of inputs includes directories, this variable
will specify patterns used to exclude files from them.
The following patterns are added by doxygen_add_docs() to
ensure CMake-specific files and directories are not
included in the input. If the project sets
DOXYGEN_EXCLUDE_PATTERNS, those contents are merged with
these additional patterns rather than replacing them:

*/.git/*
*/.svn/*
*/.hg/*
*/CMakeFiles/*
*/_CPack_Packages/*
DartConfiguration.tcl
CMakeLists.txt
CMakeCache.txt

DOXYGEN_OUTPUT_DIRECTORY
Set to CMAKE_CURRENT_BINARY_DIR by this module. Note that
if the project provides its own value for this and it is
a relative path, it will be converted to an absolute path
relative to the current binary directory. This is
necessary because doxygen will normally be run from a
directory within the source tree so that relative source
paths work as expected. If this directory does not exist,
it will be recursively created prior to executing the
doxygen commands.

To change any of these defaults or override any other Doxygen config
option, set relevant variables before calling doxygen_add_docs(). For
example:

set(DOXYGEN_GENERATE_HTML NO)
set(DOXYGEN_GENERATE_MAN YES)

doxygen_add_docs(
doxygen
${PROJECT_SOURCE_DIR}
COMMENT "Generate man pages"
)

A number of Doxygen config options accept lists of values, but Doxygen
requires them to be separated by whitespace. CMake variables hold lists
as a string with items separated by semi-colons, so a conversion needs
to be performed. The doxygen_add_docs() command specifically checks the
following Doxygen config options and will convert their associated
CMake variable's contents into the required form if set. CMake
variables are named DOXYGEN_<name> for the Doxygen settings specified
here.

ABBREVIATE_BRIEF
ALIASES
CITE_BIB_FILES
DIAFILE_DIRS
DOTFILE_DIRS
DOT_FONTPATH
ENABLED_SECTIONS
EXAMPLE_PATH
EXAMPLE_PATTERNS
EXCLUDE
EXCLUDE_PATTERNS
EXCLUDE_SYMBOLS
EXPAND_AS_DEFINED
EXTENSION_MAPPING
EXTRA_PACKAGES
EXTRA_SEARCH_MAPPINGS
FILE_PATTERNS
FILTER_PATTERNS
FILTER_SOURCE_PATTERNS
HTML_EXTRA_FILES
HTML_EXTRA_STYLESHEET
IGNORE_PREFIX
IMAGE_PATH
INCLUDE_FILE_PATTERNS
INCLUDE_PATH
INPUT
LATEX_EXTRA_FILES
LATEX_EXTRA_STYLESHEET
MATHJAX_EXTENSIONS
MSCFILE_DIRS
PLANTUML_INCLUDE_PATH
PREDEFINED
QHP_CUST_FILTER_ATTRS
QHP_SECT_FILTER_ATTRS
STRIP_FROM_INC_PATH
STRIP_FROM_PATH
TAGFILES
TCL_SUBST

The following single value Doxygen options will be quoted automatically
if they contain at least one space:

CHM_FILE
DIA_PATH
DOCBOOK_OUTPUT
DOCSET_FEEDNAME
DOCSET_PUBLISHER_NAME
DOT_FONTNAME
DOT_PATH
EXTERNAL_SEARCH_ID
FILE_VERSION_FILTER
GENERATE_TAGFILE
HHC_LOCATION
HTML_FOOTER
HTML_HEADER
HTML_OUTPUT
HTML_STYLESHEET
INPUT_FILTER
LATEX_FOOTER
LATEX_HEADER
LATEX_OUTPUT
LAYOUT_FILE
MAN_OUTPUT
MAN_SUBDIR
MATHJAX_CODEFILE
MSCGEN_PATH
OUTPUT_DIRECTORY
PERL_PATH
PLANTUML_JAR_PATH
PROJECT_BRIEF
PROJECT_LOGO
PROJECT_NAME
QCH_FILE
QHG_LOCATION
QHP_CUST_FILTER_NAME
QHP_VIRTUAL_FOLDER
RTF_EXTENSIONS_FILE
RTF_OUTPUT
RTF_STYLESHEET_FILE
SEARCHDATA_FILE
USE_MDFILE_AS_MAINPAGE
WARN_FORMAT
WARN_LOGFILE
XML_OUTPUT

Added in version 3.11: There are situations where it may be undesirable
for a particular config option to be automatically quoted by
doxygen_add_docs(), such as ALIASES which may need to include its own
embedded quoting. The DOXYGEN_VERBATIM_VARS variable can be used to
specify a list of Doxygen variables (including the leading DOXYGEN_
prefix) which should not be quoted. The project is then responsible
for ensuring that those variables' values make sense when placed
directly in the Doxygen input file. In the case of list variables,
list items are still separated by spaces, it is only the automatic
quoting that is skipped. For example, the following allows
doxygen_add_docs() to apply quoting to DOXYGEN_PROJECT_BRIEF, but not
each item in the DOXYGEN_ALIASES list (bracket syntax can also be used
to make working with embedded quotes easier):

set(DOXYGEN_PROJECT_BRIEF "String with spaces")
set(DOXYGEN_ALIASES
[[somealias="@some_command param"]]
"anotherAlias=@foobar"
)
set(DOXYGEN_VERBATIM_VARS DOXYGEN_ALIASES)

The resultant Doxyfile will contain the following lines:

PROJECT_BRIEF = "String with spaces"
ALIASES = somealias="@some_command param" anotherAlias=@foobar

Deprecated Result Variables
Deprecated since version 3.9.

For compatibility with previous versions of CMake, the following
variables are also defined but they are deprecated and should no longer
be used:

DOXYGEN_EXECUTABLE
The path to the doxygen command. If projects need to refer to
the doxygen executable directly, they should use the
Doxygen::doxygen import target instead.

DOXYGEN_DOT_FOUND
True if the dot executable was found.

DOXYGEN_DOT_EXECUTABLE
The path to the dot command. If projects need to refer to the
dot executable directly, they should use the Doxygen::dot import
target instead.

DOXYGEN_DOT_PATH
The path to the directory containing the dot executable as
reported in DOXYGEN_DOT_EXECUTABLE. The path may have forward
slashes even on Windows and is not suitable for direct
substitution into a Doxyfile.in template. If you need this
value, get the IMPORTED_LOCATION property of the Doxygen::dot
target and use get_filename_component() to extract the directory
part of that path. You may also want to consider using
file(TO_NATIVE_PATH) to prepare the path for a Doxygen
configuration file.

Deprecated Hint Variables
Deprecated since version 3.9.

DOXYGEN_SKIP_DOT
This variable has no effect for the component form of
find_package. In backward compatibility mode (i.e. without
components list) it prevents the finder module from searching
for Graphviz's dot utility.

FindEnvModules
Added in version 3.15.

Locate an environment module implementation and make commands available
to CMake scripts to use them. This is compatible with both Lua-based
Lmod and TCL-based EnvironmentModules.

This module is intended for the use case of setting up the compiler and
library environment within a CTest Script (ctest -S). It can also be
used in a CMake Script (cmake -P).

NOTE:
The loaded environment will not survive past the end of the calling
process. Do not use this module in project code (CMakeLists.txt
files) to load a compiler environment; it will not be available
during the build. Instead load the environment manually before
running CMake or using the generated build system.

Example Usage

set(CTEST_BUILD_NAME "CrayLinux-CrayPE-Cray-dynamic")
set(CTEST_BUILD_CONFIGURATION Release)
set(CTEST_BUILD_FLAGS "-k -j8")
set(CTEST_CMAKE_GENERATOR "Unix Makefiles")

...

find_package(EnvModules REQUIRED)

env_module(purge)
env_module(load modules)
env_module(load craype)
env_module(load PrgEnv-cray)
env_module(load craype-knl)
env_module(load cray-mpich)
env_module(load cray-libsci)

set(ENV{CRAYPE_LINK_TYPE} dynamic)

...

Result Variables
This module will set the following variables in your project:

EnvModules_FOUND
True if a compatible environment modules framework was found.

Cache Variables
The following cache variable will be set:

EnvModules_COMMAND
The low level module command to use. Currently supported
implementations are the Lua based Lmod and TCL based
EnvironmentModules.

Environment Variables

ENV{MODULESHOME}
Usually set by the module environment implementation, used as a
hint to locate the module command to execute.

Provided Functions
This defines the following CMake functions for interacting with
environment modules:

env_module
Execute an arbitrary module command:

env_module(cmd arg1 ... argN)
env_module(
COMMAND cmd arg1 ... argN
[OUTPUT_VARIABLE <out-var>]
[RESULT_VARIABLE <ret-var>]
)

The options are:

cmd arg1 ... argN
The module sub-command and arguments to execute as if
they were passed directly to the module command in your
shell environment.

OUTPUT_VARIABLE <out-var>
The standard output from executing the module command.

RESULT_VARIABLE <ret-var>
The return code from executing the module command.

env_module_swap
Swap one module for another:

env_module_swap(out_mod in_mod
[OUTPUT_VARIABLE <out-var>]
[RESULT_VARIABLE <ret-var>]
)

This is functionally equivalent to the module swap out_mod
in_mod shell command. The options are:

OUTPUT_VARIABLE <out-var>
The standard output from executing the module command.

RESULT_VARIABLE <ret-var>
The return code from executing the module command.

env_module_list
Retrieve the list of currently loaded modules:

env_module_list(<out-var>)

This is functionally equivalent to the module list shell
command. The result is stored in <out-var> as a properly
formatted CMake semicolon-separated list variable.

env_module_avail
Retrieve the list of available modules:

env_module_avail([<mod-prefix>] <out-var>)

This is functionally equivalent to the module avail <mod-prefix>
shell command. The result is stored in <out-var> as a properly
formatted CMake semicolon-separated list variable.

FindEXPAT
Find the native Expat headers and library. Expat is a stream-oriented
XML parser library written in C.

Imported Targets
Added in version 3.10.

This module defines the following IMPORTED targets:

EXPAT::EXPAT
The Expat expat library, if found.

Result Variables
This module will set the following variables in your project:

EXPAT_INCLUDE_DIRS
where to find expat.h, etc.

EXPAT_LIBRARIES
the libraries to link against to use Expat.

EXPAT_FOUND
true if the Expat headers and libraries were found.

Hints
EXPAT_USE_STATIC_LIBS
Added in version 3.28.

Set to TRUE to use static libraries.

Added in version 3.31: Implemented on non-Windows platforms.

FindFLEX
Find Fast Lexical Analyzer (Flex) executable and provides a macro to
generate custom build rules

The module defines the following variables:

FLEX_FOUND - True is flex executable is found
FLEX_EXECUTABLE - the path to the flex executable
FLEX_VERSION - the version of flex
FLEX_LIBRARIES - The flex libraries
FLEX_INCLUDE_DIRS - The path to the flex headers

The minimum required version of flex can be specified using the
standard syntax, e.g. find_package(FLEX 2.5.13)

If flex is found on the system, the module provides the macro:

FLEX_TARGET(Name FlexInput FlexOutput
[COMPILE_FLAGS <string>]
[DEFINES_FILE <string>]
)

which creates a custom command to generate the FlexOutput file from the
FlexInput file. Name is an alias used to get details of this custom
command. If COMPILE_FLAGS option is specified, the next parameter is
added to the flex command line.

Added in version 3.5: If flex is configured to output a header file,
the DEFINES_FILE option may be used to specify its name.

Changed in version 3.17: When CMP0098 is set to NEW, flex runs in the
CMAKE_CURRENT_BINARY_DIR directory.

The macro defines the following variables:

FLEX_${Name}_DEFINED - true is the macro ran successfully
FLEX_${Name}_OUTPUTS - the source file generated by the custom rule, an
alias for FlexOutput
FLEX_${Name}_INPUT - the flex source file, an alias for ${FlexInput}
FLEX_${Name}_OUTPUT_HEADER - the header flex output, if any.

Flex scanners often use tokens defined by Bison: the code generated by
Flex depends of the header generated by Bison. This module also
defines a macro:

ADD_FLEX_BISON_DEPENDENCY(FlexTarget BisonTarget)

which adds the required dependency between a scanner and a parser where
FlexTarget and BisonTarget are the first parameters of respectively
FLEX_TARGET and BISON_TARGET macros.

====================================================================
Example:

find_package(BISON)
find_package(FLEX)

BISON_TARGET(MyParser parser.y ${CMAKE_CURRENT_BINARY_DIR}/parser.cpp)
FLEX_TARGET(MyScanner lexer.l ${CMAKE_CURRENT_BINARY_DIR}/lexer.cpp)
ADD_FLEX_BISON_DEPENDENCY(MyScanner MyParser)

include_directories(${CMAKE_CURRENT_BINARY_DIR})
add_executable(Foo
Foo.cc
${BISON_MyParser_OUTPUTS}
${FLEX_MyScanner_OUTPUTS}
)
target_link_libraries(Foo ${FLEX_LIBRARIES})
====================================================================

FindFLTK
Find the Fast Light Toolkit (FLTK) library

Input Variables
By default this module will search for all of the FLTK components and
add them to the FLTK_LIBRARIES variable. You can limit the components
which get placed in FLTK_LIBRARIES by defining one or more of the
following three options:

FLTK_SKIP_OPENGL
Set to true to disable searching for the FLTK GL library

FLTK_SKIP_FORMS
Set to true to disable searching for the FLTK Forms library

FLTK_SKIP_IMAGES
Set to true to disable searching for the FLTK Images library

FLTK is composed also by a binary tool. You can set the following
option:

FLTK_SKIP_FLUID
Set to true to not look for the FLUID binary

Result Variables
The following variables will be defined:

FLTK_FOUND
True if all components not skipped were found

FLTK_INCLUDE_DIR
Path to the include directory for FLTK header files

FLTK_LIBRARIES
List of the FLTK libraries found

FLTK_FLUID_EXECUTABLE
Path to the FLUID binary tool

FLTK_WRAP_UI
True if FLUID is found, used to enable the FLTK_WRAP_UI command

Cache Variables
The following cache variables are also available to set or use:

FLTK_BASE_LIBRARY_RELEASE
The FLTK base library (optimized)

FLTK_BASE_LIBRARY_DEBUG
The FLTK base library (debug)

FLTK_GL_LIBRARY_RELEASE
The FLTK GL library (optimized)

FLTK_GL_LIBRARY_DEBUG
The FLTK GL library (debug)

FLTK_FORMS_LIBRARY_RELEASE
The FLTK Forms library (optimized)

FLTK_FORMS_LIBRARY_DEBUG
The FLTK Forms library (debug)

FLTK_IMAGES_LIBRARY_RELEASE
The FLTK Images protobuf library (optimized)

FLTK_IMAGES_LIBRARY_DEBUG
The FLTK Images library (debug)

Added in version 3.11: Debug and Release variants are found separately
and use per-configuration variables.

FindFLTK2
Find the native FLTK 2.0 includes and library

The following settings are defined

FLTK2_FLUID_EXECUTABLE, where to find the Fluid tool
FLTK2_WRAP_UI, This enables the FLTK2_WRAP_UI command
FLTK2_INCLUDE_DIR, where to find include files
FLTK2_LIBRARIES, list of fltk2 libraries
FLTK2_FOUND, Don't use FLTK2 if false.

The following settings should not be used in general.

FLTK2_BASE_LIBRARY = the full path to fltk2.lib
FLTK2_GL_LIBRARY = the full path to fltk2_gl.lib
FLTK2_IMAGES_LIBRARY = the full path to fltk2_images.lib

FindFontconfig
Added in version 3.14.

Find Fontconfig headers and library.

Imported Targets

Fontconfig::Fontconfig
The Fontconfig library, if found.

Result Variables
This will define the following variables in your project:

Fontconfig_FOUND
true if (the requested version of) Fontconfig is available.

Fontconfig_VERSION
the version of Fontconfig.

Fontconfig_LIBRARIES
the libraries to link against to use Fontconfig.

Fontconfig_INCLUDE_DIRS
where to find the Fontconfig headers.

Fontconfig_COMPILE_OPTIONS
this should be passed to target_compile_options(), if the target
is not used for linking

FindFreetype
Find the FreeType font renderer includes and library.

Imported Targets
Added in version 3.10.

This module defines the following IMPORTED target:

Freetype::Freetype
The Freetype freetype library, if found

Result Variables
This module will set the following variables in your project:

FREETYPE_FOUND
true if the Freetype headers and libraries were found

FREETYPE_INCLUDE_DIRS
directories containing the Freetype headers. This is the
concatenation of the variables:

FREETYPE_INCLUDE_DIR_ft2build
directory holding the main Freetype API configuration
header

FREETYPE_INCLUDE_DIR_freetype2
directory holding Freetype public headers

FREETYPE_LIBRARIES
the library to link against

FREETYPE_VERSION_STRING
the version of freetype found

Added in version 3.7: Debug and Release variants are found separately.

Hints
The user may set the environment variable FREETYPE_DIR to the root
directory of a Freetype installation.

FindGCCXML
Find the GCC-XML front-end executable.

This module will define the following variables:

GCCXML - the GCC-XML front-end executable.

FindGDAL
Find Geospatial Data Abstraction Library (GDAL).

IMPORTED Targets
Added in version 3.14.

This module defines IMPORTED target GDAL::GDAL if GDAL has been found.

Result Variables
This module will set the following variables in your project:

GDAL_FOUND
True if GDAL is found.

GDAL_INCLUDE_DIRS
Include directories for GDAL headers.

GDAL_LIBRARIES
Libraries to link to GDAL.

GDAL_VERSION
Added in version 3.14: The version of GDAL found.

Cache variables
The following cache variables may also be set:

GDAL_LIBRARY
The libgdal library file.

GDAL_INCLUDE_DIR
The directory containing gdal.h.

Hints
Set GDAL_DIR or GDAL_ROOT in the environment to specify the GDAL
installation prefix.

The following variables may be set to modify the search strategy:

FindGDAL_SKIP_GDAL_CONFIG
If set, gdal-config will not be used. This can be useful if
there are GDAL libraries built with autotools (which provide the
tool) and CMake (which do not) in the same environment.

GDAL_ADDITIONAL_LIBRARY_VERSIONS
Extra versions of library names to search for.

FindGettext
Find GNU gettext tools

This module looks for the GNU gettext tools. This module defines the
following values:

GETTEXT_MSGMERGE_EXECUTABLE: the full path to the msgmerge tool.
GETTEXT_MSGFMT_EXECUTABLE: the full path to the msgfmt tool.
GETTEXT_FOUND: True if gettext has been found.
GETTEXT_VERSION_STRING: the version of gettext found (since CMake 2.8.8)

Additionally it provides the following macros:

GETTEXT_CREATE_TRANSLATIONS ( outputFile [ALL] file1 ... fileN )

This will create a target "translations" which will convert the
given input po files into the binary output mo file. If the
ALL option is used, the translations will also be created when
building the default target.

GETTEXT_PROCESS_POT_FILE( <potfile> [ALL] [INSTALL_DESTINATION
<destdir>] LANGUAGES <lang1> <lang2> ... )

Process the given pot file to mo files.
If INSTALL_DESTINATION is given then automatically install rules will
be created, the language subdirectory will be taken into account
(by default use share/locale/).
If ALL is specified, the pot file is processed when building the all target.
It creates a custom target "potfile".

GETTEXT_PROCESS_PO_FILES( <lang> [ALL] [INSTALL_DESTINATION <dir>]
PO_FILES <po1> <po2> ... )

Process the given po files to mo files for the given language.
If INSTALL_DESTINATION is given then automatically install rules will
be created, the language subdirectory will be taken into account
(by default use share/locale/).
If ALL is specified, the po files are processed when building the all target.
It creates a custom target "pofiles".

Added in version 3.2: If you wish to use the Gettext library (libintl),
use FindIntl.

FindGIF
This finds the Graphics Interchange Format (GIF) library (giflib)

Imported targets
This module defines the following IMPORTED target:

GIF::GIF
The giflib library, if found.

Result variables
This module will set the following variables in your project:

GIF_FOUND
If false, do not try to use GIF.

GIF_INCLUDE_DIRS
where to find gif_lib.h, etc.

GIF_LIBRARIES
the libraries needed to use GIF.

GIF_VERSION
3, 4 or a full version string (eg 5.1.4) for versions >= 4.1.6.

Cache variables
The following cache variables may also be set:

GIF_INCLUDE_DIR
where to find the GIF headers.

GIF_LIBRARY
where to find the GIF library.

Hints
GIF_DIR is an environment variable that would correspond to the
./configure --prefix=$GIF_DIR.

FindGit
The module defines the following variables:

GIT_EXECUTABLE
Path to Git command-line client.

Git_FOUND, GIT_FOUND
True if the Git command-line client was found.

GIT_VERSION_STRING
The version of Git found.

Added in version 3.14: The module defines the following IMPORTED
targets (when CMAKE_ROLE is PROJECT):

Git::Git
Executable of the Git command-line client.

Example usage:

find_package(Git)
if(Git_FOUND)
message("Git found: ${GIT_EXECUTABLE}")
endif()

FindGLEW
Find the OpenGL Extension Wrangler Library (GLEW)

Input Variables
The following variables may be set to influence this module's behavior:

GLEW_USE_STATIC_LIBS
to find and create IMPORTED target for static linkage.

GLEW_VERBOSE
to output a detailed log of this module.

Imported Targets
Added in version 3.1.

This module defines the following Imported Targets:

GLEW::glew
The GLEW shared library.

GLEW::glew_s
The GLEW static library, if GLEW_USE_STATIC_LIBS is set to TRUE.

GLEW::GLEW
Duplicates either GLEW::glew or GLEW::glew_s based on
availability.

Result Variables
This module defines the following variables:

GLEW_INCLUDE_DIRS
include directories for GLEW

GLEW_LIBRARIES
libraries to link against GLEW

GLEW_SHARED_LIBRARIES
libraries to link against shared GLEW

GLEW_STATIC_LIBRARIES
libraries to link against static GLEW

GLEW_FOUND
true if GLEW has been found and can be used

GLEW_VERSION
GLEW version

GLEW_VERSION_MAJOR
GLEW major version

GLEW_VERSION_MINOR
GLEW minor version

GLEW_VERSION_MICRO
GLEW micro version

Added in version 3.7: Debug and Release variants are found separately.

FindGLUT
Find OpenGL Utility Toolkit (GLUT) library and include files.

IMPORTED Targets
Added in version 3.1.

This module defines the IMPORTED targets:

GLUT::GLUT
Defined if the system has GLUT.

Result Variables
This module defines the following variables:

GLUT_FOUND
True if glut was found.

GLUT_INCLUDE_DIRS
Added in version 3.23.

Where to find GL/glut.h, etc.

GLUT_LIBRARIES
List of libraries for using glut.

Cache Variables
This module may set the following variables depending on platform.
These variables may optionally be set to help this module find the
correct files, but clients should not use these as results:

GLUT_INCLUDE_DIR
The full path to the directory containing GL/glut.h, not
including GL/.

GLUT_glut_LIBRARY
The full path to the glut library.

GLUT_Xmu_LIBRARY
The full path to the Xmu library.

GLUT_Xi_LIBRARY
The full path to the Xi Library.

Obsolete Variables
The following variables may also be provided, for backwards
compatibility:

GLUT_INCLUDE_DIR
This is one of above Cache Variables, but prior to CMake 3.23
was also a result variable. Prefer to use GLUT_INCLUDE_DIRS
instead in CMake 3.23 and above.

FindGnuplot
this module looks for gnuplot

Once done this will define

GNUPLOT_FOUND - system has Gnuplot
GNUPLOT_EXECUTABLE - the Gnuplot executable
GNUPLOT_VERSION_STRING - the version of Gnuplot found (since CMake 2.8.8)

GNUPLOT_VERSION_STRING will not work for old versions like 3.7.1.

FindGnuTLS
Find the GNU Transport Layer Security library (gnutls)

IMPORTED Targets
Added in version 3.16.

This module defines IMPORTED target GnuTLS::GnuTLS, if gnutls has been
found.

Result Variables

GNUTLS_FOUND
System has gnutls

GNUTLS_INCLUDE_DIR
The gnutls include directory

GNUTLS_LIBRARIES
The libraries needed to use gnutls

GNUTLS_DEFINITIONS
Compiler switches required for using gnutls

GNUTLS_VERSION
version of gnutls.

FindGSL
Added in version 3.2.

Find the native GNU Scientific Library (GSL) includes and libraries.

The GNU Scientific Library (GSL) is a numerical library for C and C++
programmers. It is free software under the GNU General Public License.

Imported Targets
If GSL is found, this module defines the following IMPORTED targets:

GSL::gsl - The main GSL library.
GSL::gslcblas - The CBLAS support library used by GSL.

Result Variables
This module will set the following variables in your project:

GSL_FOUND - True if GSL found on the local system
GSL_INCLUDE_DIRS - Location of GSL header files.
GSL_LIBRARIES - The GSL libraries.
GSL_VERSION - The version of the discovered GSL install.

Hints
Set GSL_ROOT_DIR to a directory that contains a GSL installation.

This script expects to find libraries at $GSL_ROOT_DIR/lib and the GSL
headers at $GSL_ROOT_DIR/include/gsl. The library directory may
optionally provide Release and Debug folders. If available, the
libraries named gsld, gslblasd or cblasd are recognized as debug
libraries. For Unix-like systems, this script will use
$GSL_ROOT_DIR/bin/gsl-config (if found) to aid in the discovery of GSL.

Cache Variables
This module may set the following variables depending on platform and
type of GSL installation discovered. These variables may optionally be
set to help this module find the correct files:

GSL_CBLAS_LIBRARY - Location of the GSL CBLAS library.
GSL_CBLAS_LIBRARY_DEBUG - Location of the debug GSL CBLAS library (if any).
GSL_CONFIG_EXECUTABLE - Location of the ``gsl-config`` script (if any).
GSL_LIBRARY - Location of the GSL library.
GSL_LIBRARY_DEBUG - Location of the debug GSL library (if any).

FindGTest
Locate the Google C++ Testing Framework.

Added in version 3.20: Upstream GTestConfig.cmake is used if possible.

Imported targets
Added in version 3.20: This module defines the following IMPORTED
targets:

GTest::gtest
The Google Test gtest library, if found; adds Thread::Thread
automatically

GTest::gtest_main
The Google Test gtest_main library, if found

Added in version 3.23.

GTest::gmock
The Google Mock gmock library, if found; adds Thread::Thread
automatically

GTest::gmock_main
The Google Mock gmock_main library, if found

Deprecated since version 3.20: For backwards compatibility, this module
defines additionally the following deprecated IMPORTED targets
(available since 3.5):

GTest::GTest
The Google Test gtest library, if found; adds Thread::Thread
automatically

GTest::Main
The Google Test gtest_main library, if found

Result variables
This module will set the following variables in your project:

GTest_FOUND
Found the Google Testing framework

GTEST_INCLUDE_DIRS
the directory containing the Google Test headers

The library variables below are set as normal variables. These contain
debug/optimized keywords when a debugging library is found.

GTEST_LIBRARIES
The Google Test gtest library; note it also requires linking
with an appropriate thread library

GTEST_MAIN_LIBRARIES
The Google Test gtest_main library

GTEST_BOTH_LIBRARIES
Both gtest and gtest_main

Cache variables
The following cache variables may also be set:

GTEST_ROOT
The root directory of the Google Test installation (may also be
set as an environment variable)

GTEST_MSVC_SEARCH
If compiling with MSVC, this variable can be set to MT or MD
(the default) to enable searching a GTest build tree

Example usage

enable_testing()
find_package(GTest REQUIRED)

add_executable(foo foo.cc)
target_link_libraries(foo GTest::gtest GTest::gtest_main)

add_test(AllTestsInFoo foo)

Deeper integration with CTest
See GoogleTest for information on the gtest_add_tests() and
gtest_discover_tests() commands.

Changed in version 3.9: Previous CMake versions defined
gtest_add_tests() macro in this module.

FindGTK
Find GTK, glib and GTKGLArea

GTK_INCLUDE_DIR - Directories to include to use GTK
GTK_LIBRARIES - Files to link against to use GTK
GTK_FOUND - GTK was found
GTK_GL_FOUND - GTK's GL features were found

FindGTK2
Find the GTK2 widget libraries and several of its other optional
components like gtkmm, glade, and glademm.

Specify one or more of the following components as you call this find
module. See example below.

o gtk

o gtkmm

o glade

o glademm

Imported Targets
This module defines the following IMPORTED targets (subject to
component selection):

GTK2::atk, GTK2::atkmm, GTK2::cairo, GTK2::cairomm, GTK2::gdk_pixbuf,
GTK2::gdk, GTK2::gdkmm, GTK2::gio, GTK2::giomm, GTK2::glade,
GTK2::glademm, GTK2::glib, GTK2::glibmm, GTK2::gmodule, GTK2::gobject,
GTK2::gthread, GTK2::gtk, GTK2::gtkmm, GTK2::harfbuzz, GTK2::pango,
GTK2::pangocairo, GTK2::pangoft2, GTK2::pangomm, GTK2::pangoxft,
GTK2::sigc.

Added in version 3.16.7: Added the GTK2::harfbuzz target.

Result Variables
The following variables will be defined for your use

GTK2_FOUND
Were all of your specified components found?

GTK2_INCLUDE_DIRS
All include directories

GTK2_LIBRARIES
All libraries

GTK2_TARGETS
Added in version 3.5: All imported targets

GTK2_DEFINITIONS
Additional compiler flags

GTK2_VERSION
The version of GTK2 found (x.y.z)

GTK2_MAJOR_VERSION
The major version of GTK2

GTK2_MINOR_VERSION
The minor version of GTK2

GTK2_PATCH_VERSION
The patch version of GTK2

Added in version 3.5: When GTK2_USE_IMPORTED_TARGETS is set to TRUE,
GTK2_LIBRARIES will list imported targets instead of library paths.

Input Variables
Optional variables you can define prior to calling this module:

GTK2_DEBUG
Enables verbose debugging of the module

GTK2_ADDITIONAL_SUFFIXES
Allows defining additional directories to search for include
files

Example Usage
Call find_package() once. Here are some examples to pick from:

Require GTK 2.6 or later:

find_package(GTK2 2.6 REQUIRED gtk)

Require GTK 2.10 or later and Glade:

find_package(GTK2 2.10 REQUIRED gtk glade)

Search for GTK/GTKMM 2.8 or later:

find_package(GTK2 2.8 COMPONENTS gtk gtkmm)

Use the results:

if(GTK2_FOUND)
include_directories(${GTK2_INCLUDE_DIRS})
add_executable(mygui mygui.cc)
target_link_libraries(mygui ${GTK2_LIBRARIES})
endif()

FindHDF5
Find Hierarchical Data Format (HDF5), a library for reading and writing
self describing array data.

This module invokes the HDF5 wrapper compiler that should be installed
alongside HDF5. Depending upon the HDF5 Configuration, the wrapper
compiler is called either h5cc or h5pcc. If this succeeds, the module
will then call the compiler with the show argument to see what flags
are used when compiling an HDF5 client application.

The module will optionally accept the COMPONENTS argument. If no
COMPONENTS are specified, then the find module will default to finding
only the HDF5 C library. If one or more COMPONENTS are specified, the
module will attempt to find the language bindings for the specified
components. The valid components are C, CXX, Fortran, HL. HL refers
to the "high-level" HDF5 functions for C and Fortran. If the
COMPONENTS argument is not given, the module will attempt to find only
the C bindings. For example, to use Fortran HDF5 and HDF5-HL
functions, do: find_package(HDF5 COMPONENTS Fortran HL).

This module will read the variable HDF5_USE_STATIC_LIBRARIES to
determine whether or not to prefer a static link to a dynamic link for
HDF5 and all of it's dependencies. To use this feature, make sure that
the HDF5_USE_STATIC_LIBRARIES variable is set before the call to
find_package.

Added in version 3.10: Support for HDF5_USE_STATIC_LIBRARIES on
Windows.

Both the serial and parallel HDF5 wrappers are considered and the first
directory to contain either one will be used. In the event that both
appear in the same directory the serial version is preferentially
selected. This behavior can be reversed by setting the variable
HDF5_PREFER_PARALLEL to TRUE.

In addition to finding the includes and libraries required to compile
an HDF5 client application, this module also makes an effort to find
tools that come with the HDF5 distribution that may be useful for
regression testing.

Result Variables
This module will set the following variables in your project:

HDF5_FOUND
HDF5 was found on the system

HDF5_VERSION
Added in version 3.3: HDF5 library version

HDF5_INCLUDE_DIRS
Location of the HDF5 header files

HDF5_DEFINITIONS
Required compiler definitions for HDF5

HDF5_LIBRARIES
Required libraries for all requested bindings

HDF5_HL_LIBRARIES
Required libraries for the HDF5 high level API for all bindings,
if the HL component is enabled

Available components are: C CXX Fortran and HL. For each enabled
language binding, a corresponding HDF5_${LANG}_LIBRARIES variable, and
potentially HDF5_${LANG}_DEFINITIONS, will be defined. If the HL
component is enabled, then an HDF5_${LANG}_HL_LIBRARIES will also be
defined. With all components enabled, the following variables will be
defined:

HDF5_C_DEFINITIONS
Required compiler definitions for HDF5 C bindings

HDF5_CXX_DEFINITIONS
Required compiler definitions for HDF5 C++ bindings

HDF5_Fortran_DEFINITIONS
Required compiler definitions for HDF5 Fortran bindings

HDF5_C_INCLUDE_DIRS
Required include directories for HDF5 C bindings

HDF5_CXX_INCLUDE_DIRS
Required include directories for HDF5 C++ bindings

HDF5_Fortran_INCLUDE_DIRS
Required include directories for HDF5 Fortran bindings

HDF5_C_LIBRARIES
Required libraries for the HDF5 C bindings

HDF5_CXX_LIBRARIES
Required libraries for the HDF5 C++ bindings

HDF5_Fortran_LIBRARIES
Required libraries for the HDF5 Fortran bindings

HDF5_C_HL_LIBRARIES
Required libraries for the high level C bindings

HDF5_CXX_HL_LIBRARIES
Required libraries for the high level C++ bindings

HDF5_Fortran_HL_LIBRARIES
Required libraries for the high level Fortran bindings.

HDF5_IS_PARALLEL
HDF5 library has parallel IO support

HDF5_C_COMPILER_EXECUTABLE
path to the HDF5 C wrapper compiler

HDF5_CXX_COMPILER_EXECUTABLE
path to the HDF5 C++ wrapper compiler

HDF5_Fortran_COMPILER_EXECUTABLE
path to the HDF5 Fortran wrapper compiler

HDF5_C_COMPILER_EXECUTABLE_NO_INTERROGATE
path to the primary C compiler which is also the HDF5 wrapper

HDF5_CXX_COMPILER_EXECUTABLE_NO_INTERROGATE
path to the primary C++ compiler which is also the HDF5 wrapper

HDF5_Fortran_COMPILER_EXECUTABLE_NO_INTERROGATE
path to the primary Fortran compiler which is also the HDF5
wrapper

HDF5_DIFF_EXECUTABLE
path to the HDF5 dataset comparison tool

With all components enabled, the following targets will be defined:

HDF5::HDF5
All detected HDF5_LIBRARIES.

hdf5::hdf5
C library.

hdf5::hdf5_cpp
C++ library.

hdf5::hdf5_fortran
Fortran library.

hdf5::hdf5_hl
High-level C library.

hdf5::hdf5_hl_cpp
High-level C++ library.

hdf5::hdf5_hl_fortran
High-level Fortran library.

hdf5::h5diff
h5diff executable.

Hints
The following variables can be set to guide the search for HDF5
libraries and includes:

HDF5_PREFER_PARALLEL
Added in version 3.4.

set true to prefer parallel HDF5 (by default, serial is
preferred)

HDF5_FIND_DEBUG
Added in version 3.9.

Set true to get extra debugging output.

HDF5_NO_FIND_PACKAGE_CONFIG_FILE
Added in version 3.8.

Set true to skip trying to find hdf5-config.cmake.

FindHg
Extract information from a mercurial working copy.

The module defines the following variables:

HG_EXECUTABLE - path to mercurial command line client (hg)
HG_FOUND - true if the command line client was found
HG_VERSION_STRING - the version of mercurial found

Added in version 3.1: If the command line client executable is found
the following macro is defined:

HG_WC_INFO(<dir> <var-prefix>)

Hg_WC_INFO extracts information of a mercurial working copy at a given
location. This macro defines the following variables:

<var-prefix>_WC_CHANGESET - current changeset
<var-prefix>_WC_REVISION - current revision

Example usage:

find_package(Hg)
if(HG_FOUND)
message("hg found: ${HG_EXECUTABLE}")
HG_WC_INFO(${PROJECT_SOURCE_DIR} Project)
message("Current revision is ${Project_WC_REVISION}")
message("Current changeset is ${Project_WC_CHANGESET}")
endif()

FindHSPELL
Try to find Hebrew spell-checker (Hspell) and morphology engine.

Once done this will define

HSPELL_FOUND - system has Hspell
HSPELL_INCLUDE_DIR - the Hspell include directory
HSPELL_LIBRARIES - The libraries needed to use Hspell
HSPELL_DEFINITIONS - Compiler switches required for using Hspell

HSPELL_VERSION_STRING - The version of Hspell found (x.y)
HSPELL_MAJOR_VERSION - the major version of Hspell
HSPELL_MINOR_VERSION - The minor version of Hspell

FindHTMLHelp
This module looks for Microsoft HTML Help Compiler

It defines:

HTML_HELP_COMPILER : full path to the Compiler (hhc.exe)
HTML_HELP_INCLUDE_PATH : include path to the API (htmlhelp.h)
HTML_HELP_LIBRARY : full path to the library (htmlhelp.lib)

FindIce
Added in version 3.1.

Find the ZeroC Internet Communication Engine (ICE) programs, libraries
and datafiles.

This module supports multiple components. Components can include any
of: Freeze, Glacier2, Ice, IceBox, IceDB, IceDiscovery, IceGrid,
IceLocatorDiscovery, IcePatch, IceSSL, IceStorm, IceUtil, IceXML, or
Slice.

Ice 3.7 and later also include C++11-specific components: Glacier2++11,
Ice++11, IceBox++11, IceDiscovery++11 IceGrid, IceLocatorDiscovery++11,
IceSSL++11, IceStorm++11

Note that the set of supported components is Ice version-specific.

Added in version 3.4: Imported targets for components and most
EXECUTABLE variables.

Added in version 3.7: Debug and Release variants are found separately.

Added in version 3.10: Ice 3.7 support, including new components,
programs and the Nuget package.

This module reports information about the Ice installation in several
variables. General variables:

Ice_VERSION - Ice release version
Ice_FOUND - true if the main programs and libraries were found
Ice_LIBRARIES - component libraries to be linked
Ice_INCLUDE_DIRS - the directories containing the Ice headers
Ice_SLICE_DIRS - the directories containing the Ice slice interface
definitions

Imported targets:

Ice::<C>

Where <C> is the name of an Ice component, for example Ice::Glacier2 or
Ice++11.

Ice slice programs are reported in:

Ice_SLICE2CONFLUENCE_EXECUTABLE - path to slice2confluence executable
Ice_SLICE2CPP_EXECUTABLE - path to slice2cpp executable
Ice_SLICE2CS_EXECUTABLE - path to slice2cs executable
Ice_SLICE2FREEZEJ_EXECUTABLE - path to slice2freezej executable
Ice_SLICE2FREEZE_EXECUTABLE - path to slice2freeze executable
Ice_SLICE2HTML_EXECUTABLE - path to slice2html executable
Ice_SLICE2JAVA_EXECUTABLE - path to slice2java executable
Ice_SLICE2JS_EXECUTABLE - path to slice2js executable
Ice_SLICE2MATLAB_EXECUTABLE - path to slice2matlab executable
Ice_SLICE2OBJC_EXECUTABLE - path to slice2objc executable
Ice_SLICE2PHP_EXECUTABLE - path to slice2php executable
Ice_SLICE2PY_EXECUTABLE - path to slice2py executable
Ice_SLICE2RB_EXECUTABLE - path to slice2rb executable

Added in version 3.14: Variables for slice2confluence and slice2matlab.

Ice programs are reported in:

Ice_GLACIER2ROUTER_EXECUTABLE - path to glacier2router executable
Ice_ICEBOX_EXECUTABLE - path to icebox executable
Ice_ICEBOXXX11_EXECUTABLE - path to icebox++11 executable
Ice_ICEBOXADMIN_EXECUTABLE - path to iceboxadmin executable
Ice_ICEBOXD_EXECUTABLE - path to iceboxd executable
Ice_ICEBOXNET_EXECUTABLE - path to iceboxnet executable
Ice_ICEBRIDGE_EXECUTABLE - path to icebridge executable
Ice_ICEGRIDADMIN_EXECUTABLE - path to icegridadmin executable
Ice_ICEGRIDDB_EXECUTABLE - path to icegriddb executable
Ice_ICEGRIDNODE_EXECUTABLE - path to icegridnode executable
Ice_ICEGRIDNODED_EXECUTABLE - path to icegridnoded executable
Ice_ICEGRIDREGISTRY_EXECUTABLE - path to icegridregistry executable
Ice_ICEGRIDREGISTRYD_EXECUTABLE - path to icegridregistryd executable
Ice_ICEPATCH2CALC_EXECUTABLE - path to icepatch2calc executable
Ice_ICEPATCH2CLIENT_EXECUTABLE - path to icepatch2client executable
Ice_ICEPATCH2SERVER_EXECUTABLE - path to icepatch2server executable
Ice_ICESERVICEINSTALL_EXECUTABLE - path to iceserviceinstall executable
Ice_ICESTORMADMIN_EXECUTABLE - path to icestormadmin executable
Ice_ICESTORMDB_EXECUTABLE - path to icestormdb executable
Ice_ICESTORMMIGRATE_EXECUTABLE - path to icestormmigrate executable

Ice db programs (Windows only; standard system versions on all other
platforms) are reported in:

Ice_DB_ARCHIVE_EXECUTABLE - path to db_archive executable
Ice_DB_CHECKPOINT_EXECUTABLE - path to db_checkpoint executable
Ice_DB_DEADLOCK_EXECUTABLE - path to db_deadlock executable
Ice_DB_DUMP_EXECUTABLE - path to db_dump executable
Ice_DB_HOTBACKUP_EXECUTABLE - path to db_hotbackup executable
Ice_DB_LOAD_EXECUTABLE - path to db_load executable
Ice_DB_LOG_VERIFY_EXECUTABLE - path to db_log_verify executable
Ice_DB_PRINTLOG_EXECUTABLE - path to db_printlog executable
Ice_DB_RECOVER_EXECUTABLE - path to db_recover executable
Ice_DB_STAT_EXECUTABLE - path to db_stat executable
Ice_DB_TUNER_EXECUTABLE - path to db_tuner executable
Ice_DB_UPGRADE_EXECUTABLE - path to db_upgrade executable
Ice_DB_VERIFY_EXECUTABLE - path to db_verify executable
Ice_DUMPDB_EXECUTABLE - path to dumpdb executable
Ice_TRANSFORMDB_EXECUTABLE - path to transformdb executable

Ice component libraries are reported in:

Ice_<C>_FOUND - ON if component was found
Ice_<C>_LIBRARIES - libraries for component

Note that <C> is the uppercased name of the component.

This module reads hints about search results from:

Ice_HOME - the root of the Ice installation

The environment variable ICE_HOME may also be used; the Ice_HOME
variable takes precedence.

NOTE:
On Windows, Ice 3.7.0 and later provide libraries via the NuGet
package manager. Appropriate NuGet packages will be searched for
using CMAKE_PREFIX_PATH, or alternatively Ice_HOME may be set to the
location of a specific NuGet package to restrict the search.

The following cache variables may also be set:

Ice_<P>_EXECUTABLE - the path to executable <P>
Ice_INCLUDE_DIR - the directory containing the Ice headers
Ice_SLICE_DIR - the directory containing the Ice slice interface
definitions
Ice_<C>_LIBRARY - the library for component <C>

NOTE:
In most cases none of the above variables will require setting,
unless multiple Ice versions are available and a specific version is
required. On Windows, the most recent version of Ice will be found
through the registry. On Unix, the programs, headers and libraries
will usually be in standard locations, but Ice_SLICE_DIRS might not
be automatically detected (commonly known locations are searched).
All the other variables are defaulted using Ice_HOME, if set. It's
possible to set Ice_HOME and selectively specify alternative
locations for the other components; this might be required for e.g.
newer versions of Visual Studio if the heuristics are not sufficient
to identify the correct programs and libraries for the specific
Visual Studio version.

Other variables one may set to control this module are:

Ice_DEBUG - Set to ON to enable debug output from FindIce.

FindIconv
Added in version 3.11.

This module finds the iconv() POSIX.1 functions on the system. These
functions might be provided in the regular C library or externally in
the form of an additional library.

The following variables are provided to indicate iconv support:

Iconv_FOUND
Variable indicating if the iconv support was found.

Iconv_INCLUDE_DIRS
The directories containing the iconv headers.

Iconv_LIBRARIES
The iconv libraries to be linked.

Iconv_VERSION
Added in version 3.21.

The version of iconv found (x.y)

Iconv_VERSION_MAJOR
Added in version 3.21.

The major version of iconv

Iconv_VERSION_MINOR
Added in version 3.21.

The minor version of iconv

Iconv_IS_BUILT_IN
A variable indicating whether iconv support is stemming from the
C library or not. Even if the C library provides iconv(), the
presence of an external libiconv implementation might lead to
this being false.

Additionally, the following IMPORTED target is being provided:

Iconv::Iconv
Imported target for using iconv.

The following cache variables may also be set:

Iconv_INCLUDE_DIR
The directory containing the iconv headers.

Iconv_LIBRARY
The iconv library (if not implicitly given in the C library).

NOTE:
On POSIX platforms, iconv might be part of the C library and the
cache variables Iconv_INCLUDE_DIR and Iconv_LIBRARY might be empty.

NOTE:
Some libiconv implementations don't embed the version number in
their header files. In this case the variables Iconv_VERSION* will
be empty.

FindIcotool
Find icotool

This module looks for icotool. Convert and create Win32 icon and cursor
files. This module defines the following values:

ICOTOOL_EXECUTABLE: the full path to the icotool tool.
ICOTOOL_FOUND: True if icotool has been found.
ICOTOOL_VERSION_STRING: the version of icotool found.

FindICU
Added in version 3.7.

Find the International Components for Unicode (ICU) libraries and
programs.

This module supports multiple components. Components can include any
of: data, i18n, io, le, lx, test, tu and uc.

Note that on Windows data is named dt and i18n is named in; any of the
names may be used, and the appropriate platform-specific library name
will be automatically selected.

Added in version 3.11: Added support for static libraries on Windows.

This module reports information about the ICU installation in several
variables. General variables:

ICU_FOUND - true if the main programs and libraries were found
ICU_INCLUDE_DIRS - the directories containing the ICU headers
ICU_LIBRARIES - component libraries to be linked
ICU_VERSION - ICU release version

Imported targets:

ICU::<C>

Where <C> is the name of an ICU component, for example ICU::i18n; <C>
is lower-case.

ICU programs are reported in:

ICU_GENCNVAL_EXECUTABLE - path to gencnval executable
ICU_ICUINFO_EXECUTABLE - path to icuinfo executable
ICU_GENBRK_EXECUTABLE - path to genbrk executable
ICU_ICU-CONFIG_EXECUTABLE - path to icu-config executable
ICU_GENRB_EXECUTABLE - path to genrb executable
ICU_GENDICT_EXECUTABLE - path to gendict executable
ICU_DERB_EXECUTABLE - path to derb executable
ICU_PKGDATA_EXECUTABLE - path to pkgdata executable
ICU_UCONV_EXECUTABLE - path to uconv executable
ICU_GENCFU_EXECUTABLE - path to gencfu executable
ICU_MAKECONV_EXECUTABLE - path to makeconv executable
ICU_GENNORM2_EXECUTABLE - path to gennorm2 executable
ICU_GENCCODE_EXECUTABLE - path to genccode executable
ICU_GENSPREP_EXECUTABLE - path to gensprep executable
ICU_ICUPKG_EXECUTABLE - path to icupkg executable
ICU_GENCMN_EXECUTABLE - path to gencmn executable

ICU component libraries are reported in:

ICU_<C>_FOUND - ON if component was found; ``<C>`` is upper-case.
ICU_<C>_LIBRARIES - libraries for component; ``<C>`` is upper-case.

ICU datafiles are reported in:

ICU_MAKEFILE_INC - Makefile.inc
ICU_PKGDATA_INC - pkgdata.inc

This module reads hints about search results from:

ICU_ROOT - the root of the ICU installation

The environment variable ICU_ROOT may also be used; the ICU_ROOT
variable takes precedence.

The following cache variables may also be set:

ICU_<P>_EXECUTABLE - the path to executable <P>; ``<P>`` is upper-case.
ICU_INCLUDE_DIR - the directory containing the ICU headers
ICU_<C>_LIBRARY - the library for component <C>; ``<C>`` is upper-case.

NOTE:
In most cases none of the above variables will require setting,
unless multiple ICU versions are available and a specific version is
required.

FindImageMagick
Find ImageMagick, software suite for displaying, converting and
manipulating raster images.

Added in version 3.9: Added support for ImageMagick 7.

This module will search for a set of ImageMagick tools specified as
components in the find_package() call. Typical components include, but
are not limited to (future versions of ImageMagick might have
additional components not listed here):

o animate

o compare

o composite

o conjure

o convert

o display

o identify

o import

o mogrify

o montage

o stream

If no component is specified in the find_package() call, then it only
searches for the ImageMagick executable directory.

There are also components for the following ImageMagick APIs:

o Magick++: ImageMagick C++ API, if found.

o MagickWand: ImageMagick MagickWand C API, if found.

o MagickCore: ImageMagick MagickCore low-level C API, if found.

Imported targets
Added in version 3.26.

This module defines the following IMPORTED targets:

ImageMagick::Magick++
ImageMagick C++ API, if found.

ImageMagick::MagickWand
ImageMagick MagickWand C API, if found.

ImageMagick::MagickCore
ImageMagick MagickCore low-level C API, if found.

Result Variables

ImageMagick_FOUND
TRUE if all components are found.

ImageMagick_EXECUTABLE_DIR
Full path to executables directory.

ImageMagick_INCLUDE_DIRS
Full paths to all include dirs.

ImageMagick_LIBRARIES
Full paths to all libraries.

ImageMagick_COMPILE_OPTIONS
Compile options of all libraries.

ImageMagick_VERSION_STRING
The version of ImageMagick found (since CMake 2.8.8). Will not
work for old versions like 5.2.3.

ImageMagick_<component>_FOUND
TRUE if <component> is found.

ImageMagick_<component>_EXECUTABLE
Full path to <component> executable.

ImageMagick_<component>_INCLUDE_DIRS
Full path to <component> include dirs.

ImageMagick_<component>_COMPILE_OPTIONS
Added in version 3.26.

Compile options of <component>.

ImageMagick_<component>_LIBRARIES
Added in version 3.31.

Full path to <component> libraries.

Example Usage

find_package(ImageMagick COMPONENTS Magick++)
target_link_libraries(example PRIVATE ImageMagick::Magick++)

FindIntl
Added in version 3.2.

Find the Gettext libintl headers and libraries.

This module reports information about the Gettext libintl installation
in several variables.

Intl_FOUND
True if libintl is found.

Intl_INCLUDE_DIRS
The directory containing the libintl headers.

Intl_LIBRARIES
The intl libraries to be linked.

Intl_VERSION
Added in version 3.21.

The version of intl found (x.y.z)

Intl_VERSION_MAJOR
Added in version 3.21.

The major version of intl

Intl_VERSION_MINOR
Added in version 3.21.

The minor version of intl

Intl_VERSION_PATCH
Added in version 3.21.

The patch version of intl

Added in version 3.20: This module defines IMPORTED target Intl::Intl.

The following cache variables may also be set:

Intl_INCLUDE_DIR
The directory containing the libintl headers

Intl_LIBRARY
The libintl library (if any)

Intl_IS_BUILT_IN
Added in version 3.20.

whether intl is a part of the C library.

NOTE:
On some platforms, such as Linux with GNU libc, the gettext
functions are present in the C standard library and libintl is not
required. Intl_LIBRARIES will be empty in this case.

NOTE:
Some libintl implementations don't embed the version number in their
header files. In this case the variables Intl_VERSION* will be
empty.

NOTE:
If you wish to use the Gettext tools (msgmerge, msgfmt, etc.), use
FindGettext.

FindJasper
Find the Jasper JPEG2000 library.

IMPORTED Targets

Jasper::Jasper
The jasper library, if found.

Result Variables
This module defines the following variables:

JASPER_FOUND
system has Jasper

JASPER_INCLUDE_DIRS
Added in version 3.22.

the Jasper include directory

JASPER_LIBRARIES
the libraries needed to use Jasper

JASPER_VERSION_STRING
the version of Jasper found

Cache variables
The following cache variables may also be set:

JASPER_INCLUDE_DIR
where to find jasper/jasper.h, etc.

JASPER_LIBRARY_RELEASE
where to find the Jasper library (optimized).

JASPER_LIBARRY_DEBUG
where to find the Jasper library (debug).

FindJava
Find Java

This module finds if Java is installed and determines where the include
files and libraries are. The caller may set variable JAVA_HOME to
specify a Java installation prefix explicitly.

See also the FindJNI module to find Java Native Interface (JNI).

Added in version 3.10: Added support for Java 9+ version parsing.

Specify one or more of the following components as you call this find
module. See example below.

Runtime = Java Runtime Environment used to execute Java byte-compiled applications
Development = Development tools (java, javac, javah, jar and javadoc), includes Runtime component
IdlJ = Interface Description Language (IDL) to Java compiler
JarSigner = Signer and verifier tool for Java Archive (JAR) files

This module sets the following result variables:

Java_JAVA_EXECUTABLE = the full path to the Java runtime
Java_JAVAC_EXECUTABLE = the full path to the Java compiler
Java_JAVAH_EXECUTABLE = the full path to the Java header generator
Java_JAVADOC_EXECUTABLE = the full path to the Java documentation generator
Java_IDLJ_EXECUTABLE = the full path to the Java idl compiler
Java_JAR_EXECUTABLE = the full path to the Java archiver
Java_JARSIGNER_EXECUTABLE = the full path to the Java jar signer
Java_VERSION_STRING = Version of java found, eg. 1.6.0_12
Java_VERSION_MAJOR = The major version of the package found.
Java_VERSION_MINOR = The minor version of the package found.
Java_VERSION_PATCH = The patch version of the package found.
Java_VERSION_TWEAK = The tweak version of the package found (after '_')
Java_VERSION = This is set to: $major[.$minor[.$patch[.$tweak]]]

Added in version 3.4: Added the Java_IDLJ_EXECUTABLE and
Java_JARSIGNER_EXECUTABLE variables.

The minimum required version of Java can be specified using the
find_package() syntax, e.g.

find_package(Java 1.8)

NOTE: ${Java_VERSION} and ${Java_VERSION_STRING} are not guaranteed to
be identical. For example some java version may return:
Java_VERSION_STRING = 1.8.0_17 and Java_VERSION = 1.8.0.17

another example is the Java OEM, with: Java_VERSION_STRING = 1.8.0-oem
and Java_VERSION = 1.8.0

For these components the following variables are set:

Java_FOUND - TRUE if all components are found.
Java_<component>_FOUND - TRUE if <component> is found.

Example Usages:

find_package(Java)
find_package(Java 1.8 REQUIRED)
find_package(Java COMPONENTS Runtime)
find_package(Java COMPONENTS Development)

FindJNI
Find Java Native Interface (JNI) headers and libraries.

JNI enables Java code running in a Java Virtual Machine (JVM) or Dalvik
Virtual Machine (DVM) on Android to call and be called by native
applications and libraries written in other languages such as C and
C++.

This module finds if Java is installed and determines where the include
files and libraries are. It also determines what the name of the
library is. The caller may set variable JAVA_HOME to specify a Java
installation prefix explicitly.

Added in version 3.24: Added imported targets, components AWT, JVM, and
Android NDK support. If no components are specified, the module
defaults to an empty components list while targeting Android, and all
available components otherwise.

When using Android NDK, the corresponding package version is reported
and a specific release can be requested. At Android API level 31 and
above, the additional NativeHelper component can be requested.
NativeHelper is also exposed as an implicit dependency of the JVM
component (only if this does not cause a conflict) which provides a
uniform access to JVM functions.

Imported Targets
Added in version 3.24.

JNI::JNI
Main JNI target, defined only if jni.h was found.

JNI::AWT
Java AWT Native Interface (JAWT) library, defined only if
component AWT was found.

JNI::JVM
Java Virtual Machine (JVM) library, defined only if component
JVM was found.

JNI::NativeHelper
When targeting Android API level 31 and above, the import target
will provide access to libnativehelper.so that exposes JVM
functions such as JNI_CreateJavaVM.

Result Variables
This module sets the following result variables:

JNI_INCLUDE_DIRS
The include directories to use.

JNI_LIBRARIES
The libraries to use (JAWT and JVM).

JNI_FOUND
TRUE if JNI headers and libraries were found.

JNI_<component>_FOUND
Added in version 3.24.

TRUE if <component> was found.

JNI_VERSION
Full Android NDK package version (including suffixes such as
-beta3 and -rc1) or undefined otherwise.

JNI_VERSION_MAJOR
Added in version 3.24.

Android NDK major version or undefined otherwise.

JNI_VERSION_MINOR
Added in version 3.24.

Android NDK minor version or undefined otherwise.

JNI_VERSION_PATCH
Added in version 3.24.

Android NDK patch version or undefined otherwise.

Cache Variables
The following cache variables are also available to set or use:

JAVA_AWT_LIBRARY
The path to the Java AWT Native Interface (JAWT) library.

JAVA_JVM_LIBRARY
The path to the Java Virtual Machine (JVM) library.

JAVA_INCLUDE_PATH
The include path to jni.h.

JAVA_INCLUDE_PATH2
The include path to machine-dependant headers jni_md.h and
jniport.h. The variable is defined only if jni.h depends on one
of these headers. In contrast, Android NDK jni.h can be
typically used standalone.

JAVA_AWT_INCLUDE_PATH
The include path to jawt.h.

FindJPEG
Find the Joint Photographic Experts Group (JPEG) library (libjpeg)

Imported targets
Added in version 3.12.

This module defines the following IMPORTED targets:

JPEG::JPEG
The JPEG library, if found.

Result variables
This module will set the following variables in your project:

JPEG_FOUND
If false, do not try to use JPEG.

JPEG_INCLUDE_DIRS
where to find jpeglib.h, etc.

JPEG_LIBRARIES
the libraries needed to use JPEG.

JPEG_VERSION
Added in version 3.12: the version of the JPEG library found

Cache variables
The following cache variables may also be set:

JPEG_INCLUDE_DIR
where to find jpeglib.h, etc.

JPEG_LIBRARY_RELEASE
where to find the JPEG library (optimized).

JPEG_LIBRARY_DEBUG
where to find the JPEG library (debug).

Added in version 3.12: Debug and Release variand are found separately.

Obsolete variables

JPEG_LIBRARY
where to find the JPEG library.

FindKDE3
Find the KDE3 include and library dirs, KDE preprocessors and define a
some macros

This module defines the following variables:

KDE3_DEFINITIONS
compiler definitions required for compiling KDE software

KDE3_INCLUDE_DIR
the KDE include directory

KDE3_INCLUDE_DIRS
the KDE and the Qt include directory, for use with
include_directories()

KDE3_LIB_DIR
the directory where the KDE libraries are installed, for use
with link_directories()

QT_AND_KDECORE_LIBS
this contains both the Qt and the kdecore library

KDE3_DCOPIDL_EXECUTABLE
the dcopidl executable

KDE3_DCOPIDL2CPP_EXECUTABLE
the dcopidl2cpp executable

KDE3_KCFGC_EXECUTABLE
the kconfig_compiler executable

KDE3_FOUND
set to TRUE if all of the above has been found

The following user adjustable options are provided:

KDE3_BUILD_TESTS
enable this to build KDE testcases

It also adds the following macros (from KDE3Macros.cmake) SRCS_VAR is
always the variable which contains the list of source files for your
application or library.

KDE3_AUTOMOC(file1 ... fileN)

Call this if you want to have automatic moc file handling.
This means if you include "foo.moc" in the source file foo.cpp
a moc file for the header foo.h will be created automatically.
You can set the property SKIP_AUTOMAKE using set_source_files_properties()
to exclude some files in the list from being processed.

KDE3_ADD_MOC_FILES(SRCS_VAR file1 ... fileN )

If you don't use the KDE3_AUTOMOC() macro, for the files
listed here moc files will be created (named "foo.moc.cpp")

KDE3_ADD_DCOP_SKELS(SRCS_VAR header1.h ... headerN.h )

Use this to generate DCOP skeletions from the listed headers.

KDE3_ADD_DCOP_STUBS(SRCS_VAR header1.h ... headerN.h )

Use this to generate DCOP stubs from the listed headers.

KDE3_ADD_UI_FILES(SRCS_VAR file1.ui ... fileN.ui )

Use this to add the Qt designer ui files to your application/library.

KDE3_ADD_KCFG_FILES(SRCS_VAR file1.kcfgc ... fileN.kcfgc )

Use this to add KDE kconfig compiler files to your application/library.

KDE3_INSTALL_LIBTOOL_FILE(target)

This will create and install a simple libtool file for the given target.

KDE3_ADD_EXECUTABLE(name file1 ... fileN )

Currently identical to add_executable(), may provide some advanced
features in the future.

KDE3_ADD_KPART(name [WITH_PREFIX] file1 ... fileN )

Create a KDE plugin (KPart, kioslave, etc.) from the given source files.
If WITH_PREFIX is given, the resulting plugin will have the prefix "lib",
otherwise it won't.
It creates and installs an appropriate libtool la-file.

KDE3_ADD_KDEINIT_EXECUTABLE(name file1 ... fileN )

Create a KDE application in the form of a module loadable via kdeinit.
A library named kdeinit_<name> will be created and a small executable
which links to it.

The option KDE3_ENABLE_FINAL to enable all-in-one compilation is no
longer supported.

Author: Alexander Neundorf <neundorf@kde.org>

FindKDE4
Find KDE4 and provide all necessary variables and macros to compile
software for it. It looks for KDE 4 in the following directories in
the given order:

CMAKE_INSTALL_PREFIX
KDEDIRS
/opt/kde4

Please look in FindKDE4Internal.cmake and KDE4Macros.cmake for more
information. They are installed with the KDE 4 libraries in
$KDEDIRS/share/apps/cmake/modules/.

Author: Alexander Neundorf <neundorf@kde.org>

FindLAPACK
Find Linear Algebra PACKage (LAPACK) library

This module finds an installed Fortran library that implements the
LAPACK linear-algebra interface.

At least one of the C, CXX, or Fortran languages must be enabled.

Input Variables
The following variables may be set to influence this module's behavior:

BLA_STATIC
if ON use static linkage

BLA_VENDOR
Set to one of the BLAS/LAPACK Vendors to search for BLAS only
from the specified vendor. If not set, all vendors are
considered.

BLA_F95
if ON tries to find the BLAS95/LAPACK95 interfaces

BLA_PREFER_PKGCONFIG
Added in version 3.20.

if set pkg-config will be used to search for a LAPACK library
first and if one is found that is preferred

BLA_PKGCONFIG_LAPACK
Added in version 3.25.

If set, the pkg-config method will look for this module name
instead of just lapack.

BLA_SIZEOF_INTEGER
Added in version 3.22.

Specify the BLAS/LAPACK library integer size:

4 Search for a BLAS/LAPACK with 32-bit integer interfaces.

8 Search for a BLAS/LAPACK with 64-bit integer interfaces.

ANY Search for any BLAS/LAPACK. Most likely, a BLAS/LAPACK
with 32-bit integer interfaces will be found.

Imported targets
This module defines the following IMPORTED targets:

LAPACK::LAPACK
Added in version 3.18.

The libraries to use for LAPACK, if found.

Result Variables
This module defines the following variables:

LAPACK_FOUND
library implementing the LAPACK interface is found

LAPACK_LINKER_FLAGS
uncached list of required linker flags (excluding -l and -L).

LAPACK_LIBRARIES
uncached list of libraries (using full path name) to link
against to use LAPACK

LAPACK95_LIBRARIES
uncached list of libraries (using full path name) to link
against to use LAPACK95

LAPACK95_FOUND
library implementing the LAPACK95 interface is found

Intel MKL
To use the Intel MKL implementation of LAPACK, a project must enable at
least one of the C or CXX languages. Set BLA_VENDOR to an Intel MKL
variant either on the command-line as -DBLA_VENDOR=Intel10_64lp or in
project code:

set(BLA_VENDOR Intel10_64lp)
find_package(LAPACK)

In order to build a project using Intel MKL, and end user must first
establish an Intel MKL environment. See the FindBLAS module section on
Intel MKL for details.

FindLATEX
Find LaTeX

This module finds an installed LaTeX and determines the location of the
compiler. Additionally the module looks for Latex-related software
like BibTeX.

Added in version 3.2: Component processing; support for htlatex,
pdftops, Biber, xindy, XeLaTeX, LuaLaTeX.

This module sets the following result variables:

LATEX_FOUND: whether found Latex and requested components
LATEX_<component>_FOUND: whether found <component>
LATEX_COMPILER: path to the LaTeX compiler
PDFLATEX_COMPILER: path to the PdfLaTeX compiler
XELATEX_COMPILER: path to the XeLaTeX compiler
LUALATEX_COMPILER: path to the LuaLaTeX compiler
BIBTEX_COMPILER: path to the BibTeX compiler
BIBER_COMPILER: path to the Biber compiler
MAKEINDEX_COMPILER: path to the MakeIndex compiler
XINDY_COMPILER: path to the xindy compiler
DVIPS_CONVERTER: path to the DVIPS converter
DVIPDF_CONVERTER: path to the DVIPDF converter
PS2PDF_CONVERTER: path to the PS2PDF converter
PDFTOPS_CONVERTER: path to the pdftops converter
LATEX2HTML_CONVERTER: path to the LaTeX2Html converter
HTLATEX_COMPILER: path to the htlatex compiler

Possible components are:

PDFLATEX
XELATEX
LUALATEX
BIBTEX
BIBER
MAKEINDEX
XINDY
DVIPS
DVIPDF
PS2PDF
PDFTOPS
LATEX2HTML
HTLATEX

Example Usages:

find_package(LATEX)
find_package(LATEX COMPONENTS PDFLATEX)
find_package(LATEX COMPONENTS BIBTEX PS2PDF)

FindLibArchive
Find libarchive library and headers. Libarchive is multi-format
archive and compression library.

The module defines the following variables:

LibArchive_FOUND - true if libarchive was found
LibArchive_INCLUDE_DIRS - include search path
LibArchive_LIBRARIES - libraries to link
LibArchive_VERSION - libarchive 3-component version number

The module defines the following IMPORTED targets:

LibArchive::LibArchive - target for linking against libarchive

Added in version 3.6: Support for new libarchive 3.2 version string
format.

Added in version 3.17: Provides an imported target.

FindLibinput
Added in version 3.14.

Find libinput headers and library.

Imported Targets

Libinput::Libinput
The libinput library, if found.

Result Variables
This will define the following variables in your project:

Libinput_FOUND
true if (the requested version of) libinput is available.

Libinput_VERSION
the version of libinput.

Libinput_LIBRARIES
the libraries to link against to use libinput.

Libinput_INCLUDE_DIRS
where to find the libinput headers.

Libinput_COMPILE_OPTIONS
this should be passed to target_compile_options(), if the target
is not used for linking

FindLibLZMA
Find LZMA compression algorithm headers and library.

Imported Targets
Added in version 3.14.

This module defines IMPORTED target LibLZMA::LibLZMA, if liblzma has
been found.

Result variables
This module will set the following variables in your project:

LIBLZMA_FOUND
True if liblzma headers and library were found.

LIBLZMA_INCLUDE_DIRS
Directory where liblzma headers are located.

LIBLZMA_LIBRARIES
Lzma libraries to link against.

LIBLZMA_HAS_AUTO_DECODER
True if lzma_auto_decoder() is found (required).

LIBLZMA_HAS_EASY_ENCODER
True if lzma_easy_encoder() is found (required).

LIBLZMA_HAS_LZMA_PRESET
True if lzma_lzma_preset() is found (required).

LIBLZMA_VERSION
Added in version 3.26: the version of LZMA found.

See also legacy variable LIBLZMA_VERSION_STRING.

Legacy Variables
The following variables are provided for backward compatibility:

LIBLZMA_VERSION_MAJOR
The major version of lzma

LIBLZMA_VERSION_MINOR
The minor version of lzma

LIBLZMA_VERSION_PATCH
The patch version of lzma

LIBLZMA_VERSION_STRING
version number as a string (ex: "5.0.3")

Changed in version 3.26: Superseded by LIBLZMA_VERSION.

FindLibXml2
Find the XML processing library (libxml2).

IMPORTED Targets
Added in version 3.12.

The following IMPORTED targets may be defined:

LibXml2::LibXml2
libxml2 library.

LibXml2::xmllint
Added in version 3.17.

xmllint command-line executable.

Result variables
This module will set the following variables in your project:

LibXml2_FOUND
true if libxml2 headers and libraries were found

LIBXML2_INCLUDE_DIR
the directory containing LibXml2 headers

LIBXML2_INCLUDE_DIRS
list of the include directories needed to use LibXml2

LIBXML2_LIBRARIES
LibXml2 libraries to be linked

LIBXML2_DEFINITIONS
the compiler switches required for using LibXml2

LIBXML2_XMLLINT_EXECUTABLE
path to the XML checking tool xmllint coming with LibXml2

LIBXML2_VERSION_STRING
the version of LibXml2 found (since CMake 2.8.8)

Cache variables
The following cache variables may also be set:

LIBXML2_INCLUDE_DIR
the directory containing LibXml2 headers

LIBXML2_LIBRARY
path to the LibXml2 library

FindLibXslt
Find the XSL Transformations, Extensible Stylesheet Language
Transformations (XSLT) library (LibXslt)

IMPORTED Targets
Added in version 3.18.

The following IMPORTED targets may be defined:

LibXslt::LibXslt
If the libxslt library has been found

LibXslt::LibExslt
If the libexslt library has been found

LibXslt::xsltproc
If the xsltproc command-line executable has been found

Result variables
This module will set the following variables in your project:
LIBXSLT_FOUND - system has LibXslt LIBXSLT_INCLUDE_DIR - the LibXslt
include directory LIBXSLT_LIBRARIES - Link these to LibXslt
LIBXSLT_DEFINITIONS - Compiler switches required for using LibXslt
LIBXSLT_VERSION_STRING - version of LibXslt found (since CMake
2.8.8)

Additionally, the following two variables are set (but not required for
using xslt):

LIBXSLT_EXSLT_INCLUDE_DIR
Added in version 3.18: The include directory for exslt.

LIBXSLT_EXSLT_LIBRARIES
Link to these if you need to link against the exslt library.

LIBXSLT_XSLTPROC_EXECUTABLE
Contains the full path to the xsltproc executable if found.

FindLTTngUST
Added in version 3.6.

Find Linux Trace Toolkit Next Generation (LTTng-UST) library.

Imported target
This module defines the following IMPORTED target:

LTTng::UST
The LTTng-UST library, if found

Result variables
This module sets the following

LTTNGUST_FOUND
TRUE if system has LTTng-UST

LTTNGUST_INCLUDE_DIRS
The LTTng-UST include directories

LTTNGUST_LIBRARIES
The libraries needed to use LTTng-UST

LTTNGUST_VERSION_STRING
The LTTng-UST version

LTTNGUST_HAS_TRACEF
TRUE if the tracef() API is available in the system's LTTng-UST

LTTNGUST_HAS_TRACELOG
TRUE if the tracelog() API is available in the system's
LTTng-UST

FindLua
Locate Lua library.

Added in version 3.18: Support for Lua 5.4.

This module defines:

LUA_FOUND
if false, do not try to link to Lua

LUA_LIBRARIES
both lua and lualib

LUA_INCLUDE_DIR
where to find lua.h

LUA_VERSION_STRING
the version of Lua found

LUA_VERSION_MAJOR
the major version of Lua

LUA_VERSION_MINOR
the minor version of Lua

LUA_VERSION_PATCH
the patch version of Lua

Note that the expected include convention is

#include "lua.h"

and not

#include <lua/lua.h>

This is because, the lua location is not standardized and may exist in
locations other than lua/

FindLua50
Locate Lua library.

This module defines:

LUA50_FOUND, if false, do not try to link to Lua
LUA_LIBRARIES, both lua and lualib
LUA_INCLUDE_DIR, where to find lua.h and lualib.h (and probably lauxlib.h)

Note that the expected include convention is:

#include "lua.h"

and not:

#include <lua/lua.h>

This is because, the lua location is not standardized and may exist in
locations other than lua/

FindLua51
Locate Lua library. This module defines:

LUA51_FOUND, if false, do not try to link to Lua
LUA_LIBRARIES
LUA_INCLUDE_DIR, where to find lua.h
LUA_VERSION_STRING, the version of Lua found (since CMake 2.8.8)

Note that the expected include convention is:

#include "lua.h"

and not:

#include <lua/lua.h>

This is because, the lua location is not standardized and may exist in
locations other than lua/

FindMatlab
Finds Matlab or Matlab Compiler Runtime (MCR) and provides Matlab
tools, libraries and compilers to CMake.

This package primary purpose is to find the libraries associated with
Matlab or the MCR in order to be able to build Matlab extensions (mex
files). It can also be used:

o to run specific commands in Matlab in case Matlab is available

o for declaring Matlab unit test

o to retrieve various information from Matlab (mex extensions, versions
and release queries, ...)

Added in version 3.12: Added Matlab Compiler Runtime (MCR) support.

The module supports the following components:

o ENG_LIBRARY and MAT_LIBRARY: respectively the ENG and MAT libraries
of Matlab

o MAIN_PROGRAM the Matlab binary program. Note that this component is
not available on the MCR version, and will yield an error if the MCR
is found instead of the regular Matlab installation.

o MEX_COMPILER the MEX compiler.

o MCC_COMPILER the MCC compiler, included with the Matlab Compiler
add-on.

o SIMULINK the Simulink environment.

Added in version 3.7: Added the MAT_LIBRARY component.

Added in version 3.13: Added the ENGINE_LIBRARY, DATAARRAY_LIBRARY and
MCC_COMPILER components.

Changed in version 3.14: Removed the MX_LIBRARY, ENGINE_LIBRARY and
DATAARRAY_LIBRARY components. These libraries are found
unconditionally.

Added in version 3.30: Added support for specifying a version range to
find_package() and added support for specifying REGISTRY_VIEW to
find_package(), matlab_extract_all_installed_versions_from_registry()
and matlab_get_all_valid_matlab_roots_from_registry(). The default
behavior remained unchanged, by using the registry view TARGET.

NOTE:
The version given to the find_package() directive is the Matlab
version, which should not be confused with the Matlab release name
(e.g. R2023b). The matlab_get_version_from_release_name() and
matlab_get_release_name_from_version() provide a mapping between the
release name and the version.

The variable Matlab_ROOT_DIR may be specified in order to give the path
of the desired Matlab version. Otherwise, the behavior is platform
specific:

o Windows: The installed versions of Matlab/MCR are retrieved from the
Windows registry. The REGISTRY_VIEW argument may optionally be
specified to manually control whether 32bit or 64bit versions shall
be searched for.

o macOS: The installed versions of Matlab/MCR are given by the MATLAB
default installation paths under $HOME/Applications and
/Applications. If no such application is found, it falls back to the
one that might be accessible from the PATH.

o Unix: The desired Matlab should be accessible from the PATH. This
does not work for MCR installation and Matlab_ROOT_DIR should be
specified on this platform.

Additional information is provided when MATLAB_FIND_DEBUG is set. When
a Matlab/MCR installation is found automatically and the MATLAB_VERSION
is not given, the version is queried from Matlab directly (on Windows
this may pop up a Matlab window) or from the MCR installation.

The mapping of the release names and the version of Matlab is performed
by defining pairs (name, version). The variable
MATLAB_ADDITIONAL_VERSIONS may be provided before the call to the
find_package() in order to handle additional versions.

A Matlab scripts can be added to the set of tests using the
matlab_add_unit_test(). By default, the Matlab unit test framework will
be used (>= 2013a) to run this script, but regular .m files returning
an exit code can be used as well (0 indicating a success).

Module Input Variables
Users or projects may set the following variables to configure the
module behavior:

Matlab_ROOT
Added in version 3.25.

Default value for Matlab_ROOT_DIR, the root of the Matlab
installation.

Matlab_ROOT_DIR
The root of the Matlab installation.

MATLAB_FIND_DEBUG
outputs debug information

MATLAB_ADDITIONAL_VERSIONS
additional versions of Matlab for the automatic retrieval of the
installed versions.

Imported targets
Added in version 3.22.

This module defines the following IMPORTED targets:

Matlab::mex
The mex library, always available for MATLAB installations.
Available for MCR installations if provided by MCR.

Matlab::mx
The mx library of Matlab (arrays), always available for MATLAB
installations. Available for MCR installations if provided by
MCR.

Matlab::eng
Matlab engine library. Available only if the ENG_LIBRARY
component is requested.

Matlab::mat
Matlab matrix library. Available only if the MAT_LIBRARY
component is requested.

Matlab::MatlabEngine
Matlab C++ engine library, always available for MATLAB R2018a
and newer. Available for MCR installations if provided by MCR.

Matlab::MatlabDataArray
Matlab C++ data array library, always available for MATLAB
R2018a and newer. Available for MCR installations if provided
by MCR.

Variables defined by the module
Result variables

Matlab_FOUND
TRUE if the Matlab installation is found, FALSE otherwise. All
variable below are defined if Matlab is found.

Matlab_VERSION
Added in version 3.27.

the numerical version (e.g. 23.2.0) of Matlab found. Not to be
confused with Matlab release name (e.g. R2023b) that can be
obtained with matlab_get_release_name_from_version().

Matlab_ROOT_DIR
the final root of the Matlab installation determined by the
FindMatlab module.

Matlab_MAIN_PROGRAM
the Matlab binary program. Available only if the component
MAIN_PROGRAM is given in the find_package() directive.

Matlab_INCLUDE_DIRS
the path of the Matlab libraries headers

Matlab_MEX_LIBRARY
library for mex, always available for MATLAB installations.
Available for MCR installations if provided by MCR.

Matlab_MX_LIBRARY
mx library of Matlab (arrays), always available for MATLAB
installations. Available for MCR installations if provided by
MCR.

Matlab_ENG_LIBRARY
Matlab engine library. Available only if the component
ENG_LIBRARY is requested.

Matlab_MAT_LIBRARY
Matlab matrix library. Available only if the component
MAT_LIBRARY is requested.

Matlab_ENGINE_LIBRARY
Added in version 3.13.

Matlab C++ engine library, always available for MATLAB R2018a
and newer. Available for MCR installations if provided by MCR.

Matlab_DATAARRAY_LIBRARY
Added in version 3.13.

Matlab C++ data array library, always available for MATLAB
R2018a and newer. Available for MCR installations if provided
by MCR.

Matlab_LIBRARIES
the whole set of libraries of Matlab

Matlab_MEX_COMPILER
the mex compiler of Matlab. Currently not used. Available only
if the component MEX_COMPILER is requested.

Matlab_MCC_COMPILER
Added in version 3.13.

the mcc compiler of Matlab. Included with the Matlab Compiler
add-on. Available only if the component MCC_COMPILER is
requested.

Cached variables

Matlab_MEX_EXTENSION
the extension of the mex files for the current platform (given
by Matlab).

Matlab_ROOT_DIR
the location of the root of the Matlab installation found. If
this value is changed by the user, the result variables are
recomputed.

Provided commands

matlab_get_version_from_release_name()
returns the version from the Matlab release name

matlab_get_release_name_from_version()
returns the release name from the Matlab version

matlab_add_mex()
adds a target compiling a MEX file.

matlab_add_unit_test()
adds a Matlab unit test file as a test to the project.

matlab_extract_all_installed_versions_from_registry()
parses the registry for all Matlab versions. Available on
Windows only. The part of the registry parsed is dependent on
the host processor

matlab_get_all_valid_matlab_roots_from_registry()
returns all the possible Matlab or MCR paths, according to a
previously given list. Only the existing/accessible paths are
kept. This is mainly useful for the searching all possible
Matlab installation.

matlab_get_mex_suffix()
returns the suffix to be used for the mex files
(platform/architecture dependent)

matlab_get_version_from_matlab_run()
returns the version of Matlab/MCR, given the full directory of
the Matlab/MCR installation path.

Known issues

Symbol clash in a MEX target
By default, every symbols inside a MEX file defined with the
command matlab_add_mex() have hidden visibility, except for the
entry point. This is the default behavior of the MEX compiler,
which lowers the risk of symbol collision between the libraries
shipped with Matlab, and the libraries to which the MEX file is
linking to. This is also the default on Windows platforms.

However, this is not sufficient in certain case, where for
instance your MEX file is linking against libraries that are
already loaded by Matlab, even if those libraries have different
SONAMES. A possible solution is to hide the symbols of the
libraries to which the MEX target is linking to. This can be
achieved in GNU GCC compilers with the linker option
-Wl,--exclude-libs,ALL.

Tests using GPU resources
in case your MEX file is using the GPU and in order to be able
to run unit tests on this MEX file, the GPU resources should be
properly released by Matlab. A possible solution is to make
Matlab aware of the use of the GPU resources in the session,
which can be performed by a command such as D = gpuDevice() at
the beginning of the test script (or via a fixture).

Reference

Matlab_ROOT_DIR
The root folder of the Matlab installation. If set before the
call to find_package(), the module will look for the components
in that path. If not set, then an automatic search of Matlab
will be performed. If set, it should point to a valid version of
Matlab.

MATLAB_FIND_DEBUG
If set, the lookup of Matlab and the intermediate configuration
steps are outputted to the console.

MATLAB_ADDITIONAL_VERSIONS
If set, specifies additional versions of Matlab that may be
looked for. The variable should be a list of strings, organized
by pairs of release name and versions, such as follows:

set(MATLAB_ADDITIONAL_VERSIONS
"release_name1=corresponding_version1"
"release_name2=corresponding_version2"
...
)

Example:

set(MATLAB_ADDITIONAL_VERSIONS
"R2013b=8.2"
"R2013a=8.1"
"R2012b=8.0")

The order of entries in this list matters when several versions
of Matlab are installed. The priority is set according to the
ordering in this list.

matlab_get_version_from_release_name

matlab_get_version_from_release_name(release version)

o Input: release is the release name (e.g. R2023b)

o Output: version is the version of Matlab (e.g. 23.2.0)

Returns the version of Matlab from a release name

NOTE:
This command provides correct versions mappings for Matlab
but not MCR.

matlab_get_release_name_from_version

matlab_get_release_name_from_version(version release_name)

o Input: version is the version of Matlab (e.g. 23.2.0)

o Output: release_name is the release name (R2023b)

Returns the release name from the version of Matlab

NOTE:
This command provides correct version mappings for Matlab but
not MCR.

matlab_extract_all_installed_versions_from_registry
This function parses the Windows registry and finds the Matlab
versions that are installed. The found versions are stored in
matlab_versions.

matlab_extract_all_installed_versions_from_registry(matlab_versions
[REGISTRY_VIEW view])
Added in version 3.30.

o Output: matlab_versions is a list of all the versions
of Matlab found

o Input: REGISTRY_VIEW Optional registry view to use for
registry interaction. The argument is passed (or
omitted) to cmake_host_system_information() without
further checks or modification.

matlab_extract_all_installed_versions_from_registry(win64
matlab_versions)

o Input: win64 is a boolean to search for the 64 bit
version of Matlab. Set to ON to use the 64bit registry
view or OFF to use the 32bit registry view. If finer
control is needed, see signature above.

o Output: matlab_versions is a list of all the versions
of Matlab found

The returned list contains all versions under
HKLM\SOFTWARE\Mathworks\MATLAB, HKLM\SOFTWARE\Mathworks\MATLAB
Runtime and HKLM\SOFTWARE\Mathworks\MATLAB Compiler Runtime or
an empty list in case an error occurred (or nothing found).

NOTE:
Only the versions are provided. No check is made over the
existence of the installation referenced in the registry,

matlab_get_all_valid_matlab_roots_from_registry
Populates the Matlab root with valid versions of Matlab or
Matlab Runtime (MCR). The returned matlab_roots is organized in
triplets (type,version_number,matlab_root_path), where type
indicates either MATLAB or MCR.

matlab_get_all_valid_matlab_roots_from_registry(matlab_versions matlab_roots [REGISTRY_VIEW view])

o Input: matlab_versions of each of the Matlab or MCR
installations

o Output: matlab_roots location of each of the Matlab or MCR
installations

o Input: REGISTRY_VIEW Optional registry view to use for
registry interaction. The argument is passed (or omitted) to
cmake_host_system_information() without further checks or
modification.

Added in version 3.30: The optional REGISTRY_VIEW argument was
added to provide a more precise interface on how to interact
with the Windows Registry.

matlab_get_mex_suffix
Returns the extension of the mex files (the suffixes). This
function should not be called before the appropriate Matlab root
has been found.

matlab_get_mex_suffix(matlab_root mex_suffix)

o Input: matlab_root root of Matlab/MCR install e.g.
Matlab_ROOT_DIR

o Output: mex_suffix variable name in which the suffix will be
returned.

matlab_get_version_from_matlab_run
This function runs Matlab program specified on arguments and
extracts its version. If the path provided for the Matlab
installation points to an MCR installation, the version is
extracted from the installed files.

matlab_get_version_from_matlab_run(matlab_binary_path matlab_list_versions)

o Input: matlab_binary_path path of the matlab binary executable

o Output: matlab_list_versions the version extracted from Matlab

matlab_add_unit_test
Adds a Matlab unit test to the test set of cmake/ctest. This
command requires the component MAIN_PROGRAM and hence is not
available for an MCR installation.

The unit test uses the Matlab unittest framework (default,
available starting Matlab 2013b+) except if the option
NO_UNITTEST_FRAMEWORK is given.

The function expects one Matlab test script file to be given.
In the case NO_UNITTEST_FRAMEWORK is given, the unittest script
file should contain the script to be run, plus an exit command
with the exit value. This exit value will be passed to the ctest
framework (0 success, non 0 failure). Additional arguments
accepted by add_test() can be passed through TEST_ARGS (eg.
CONFIGURATION <config> ...).

matlab_add_unit_test(
NAME <name>
UNITTEST_FILE matlab_file_containing_unittest.m
[CUSTOM_TEST_COMMAND matlab_command_to_run_as_test]
[UNITTEST_PRECOMMAND matlab_command_to_run]
[TIMEOUT timeout]
[ADDITIONAL_PATH path1 [path2 ...]]
[MATLAB_ADDITIONAL_STARTUP_OPTIONS option1 [option2 ...]]
[TEST_ARGS arg1 [arg2 ...]]
[NO_UNITTEST_FRAMEWORK]
)

Function Parameters:

NAME name of the unittest in ctest.

UNITTEST_FILE
the matlab unittest file. Its path will be automatically
added to the Matlab path.

CUSTOM_TEST_COMMAND
Matlab script command to run as the test. If this is not
set, then the following is run:
runtests('matlab_file_name'),
exit(max([ans(1,:).Failed])) where matlab_file_name is
the UNITTEST_FILE without the extension.

UNITTEST_PRECOMMAND
Matlab script command to be ran before the file
containing the test (eg. GPU device initialization based
on CMake variables).

TIMEOUT
the test timeout in seconds. Defaults to 180 seconds as
the Matlab unit test may hang.

ADDITIONAL_PATH
a list of paths to add to the Matlab path prior to
running the unit test.

MATLAB_ADDITIONAL_STARTUP_OPTIONS
a list of additional option in order to run Matlab from
the command line. -nosplash -nodesktop -nodisplay are
always added.

TEST_ARGS
Additional options provided to the add_test command.
These options are added to the default options (eg.
"CONFIGURATIONS Release")

NO_UNITTEST_FRAMEWORK
when set, indicates that the test should not use the
unittest framework of Matlab (available for versions >=
R2013a).

WORKING_DIRECTORY
This will be the working directory for the test. If
specified it will also be the output directory used for
the log file of the test run. If not specified the
temporary directory ${CMAKE_BINARY_DIR}/Matlab will be
used as the working directory and the log location.

matlab_add_mex
Adds a Matlab MEX target. This commands compiles the given
sources with the current tool-chain in order to produce a MEX
file. The final name of the produced output may be specified, as
well as additional link libraries, and a documentation entry for
the MEX file. Remaining arguments of the call are passed to the
add_library() or add_executable() command.

matlab_add_mex(
NAME <name>
[EXECUTABLE | MODULE | SHARED]
SRC src1 [src2 ...]
[OUTPUT_NAME output_name]
[DOCUMENTATION file.txt]
[LINK_TO target1 target2 ...]
[R2017b | R2018a]
[EXCLUDE_FROM_ALL]
[NO_IMPLICIT_LINK_TO_MATLAB_LIBRARIES]
[...]
)

Function Parameters:

NAME name of the target.

SRC list of source files.

LINK_TO
a list of additional link dependencies. The target links
to libmex and libmx by default, unless the
NO_IMPLICIT_LINK_TO_MATLAB_LIBRARIES option is passed.

OUTPUT_NAME
if given, overrides the default name. The default name is
the name of the target without any prefix and with
Matlab_MEX_EXTENSION suffix.

DOCUMENTATION
if given, the file file.txt will be considered as being
the documentation file for the MEX file. This file is
copied into the same folder without any processing, with
the same name as the final mex file, and with extension
.m. In that case, typing help <name> in Matlab prints the
documentation contained in this file.

R2017b or R2018a
Added in version 3.14.

May be given to specify the version of the C API to use:
R2017b specifies the traditional (separate complex) C
API, and corresponds to the -R2017b flag for the mex
command. R2018a specifies the new interleaved complex C
API, and corresponds to the -R2018a flag for the mex
command. Ignored if MATLAB version prior to R2018a.
Defaults to R2017b.

MODULE or SHARED
Added in version 3.7.

May be given to specify the type of library to be
created.

EXECUTABLE
Added in version 3.7.

May be given to create an executable instead of a
library. If no type is given explicitly, the type is
SHARED.

EXCLUDE_FROM_ALL
This option has the same meaning as for EXCLUDE_FROM_ALL
and is forwarded to add_library() or add_executable()
commands.

NO_IMPLICIT_LINK_TO_MATLAB_LIBRARIES
Added in version 3.24.

This option permits to disable the automatic linking of
MATLAB libraries, so that only the libraries that are
actually required can be linked via the LINK_TO option.

The documentation file is not processed and should be in the
following format:

% This is the documentation
function ret = mex_target_output_name(input1)

FindMFC
Find Microsoft Foundation Class Library (MFC) on Windows

Find the native MFC - i.e. decide if an application can link to the
MFC libraries.

MFC_FOUND - Was MFC support found

You don't need to include anything or link anything to use it.

FindMotif
Try to find Motif (or lesstif)

Once done this will define:

MOTIF_FOUND - system has MOTIF
MOTIF_INCLUDE_DIR - include paths to use Motif
MOTIF_LIBRARIES - Link these to use Motif

FindMPEG
Find the native MPEG includes and library

This module defines

MPEG_INCLUDE_DIR, where to find MPEG.h, etc.
MPEG_LIBRARIES, the libraries required to use MPEG.
MPEG_FOUND, If false, do not try to use MPEG.

also defined, but not for general use are

MPEG_mpeg2_LIBRARY, where to find the MPEG library.
MPEG_vo_LIBRARY, where to find the vo library.

FindMPEG2
Find the native MPEG2 includes and library

This module defines

MPEG2_INCLUDE_DIR, path to mpeg2dec/mpeg2.h, etc.
MPEG2_LIBRARIES, the libraries required to use MPEG2.
MPEG2_FOUND, If false, do not try to use MPEG2.

also defined, but not for general use are

MPEG2_mpeg2_LIBRARY, where to find the MPEG2 library.
MPEG2_vo_LIBRARY, where to find the vo library.

FindMPI
Find a Message Passing Interface (MPI) implementation.

The Message Passing Interface (MPI) is a library used to write
high-performance distributed-memory parallel applications, and is
typically deployed on a cluster. MPI is a standard interface (defined
by the MPI forum) for which many implementations are available.

Added in version 3.10: Major overhaul of the module: many new
variables, per-language components, support for a wider variety of
runtimes.

Variables for using MPI
The module exposes the components C, CXX, MPICXX and Fortran. Each of
these controls the various MPI languages to search for. The difference
between CXX and MPICXX is that CXX refers to the MPI C API being usable
from C++, whereas MPICXX refers to the MPI-2 C++ API that was removed
again in MPI-3.

Depending on the enabled components the following variables will be
set:

MPI_FOUND
Variable indicating that MPI settings for all requested
languages have been found. If no components are specified, this
is true if MPI settings for all enabled languages were detected.
Note that the MPICXX component does not affect this variable.

MPI_VERSION
Minimal version of MPI detected among the requested languages,
or all enabled languages if no components were specified.

This module will set the following variables per language in your
project, where <lang> is one of C, CXX, or Fortran:

MPI_<lang>_FOUND
Variable indicating the MPI settings for <lang> were found and
that simple MPI test programs compile with the provided
settings.

MPI_<lang>_COMPILER
MPI compiler for <lang> if such a program exists.

MPI_<lang>_COMPILE_OPTIONS
Compilation options for MPI programs in <lang>, given as a
;-list.

MPI_<lang>_COMPILE_DEFINITIONS
Compilation definitions for MPI programs in <lang>, given as a
;-list.

MPI_<lang>_INCLUDE_DIRS
Include path(s) for MPI header.

MPI_<lang>_LINK_FLAGS
Linker flags for MPI programs.

MPI_<lang>_LIBRARIES
All libraries to link MPI programs against.

Added in version 3.9: Additionally, the following IMPORTED targets are
defined:

MPI::MPI_<lang>
Target for using MPI from <lang>.

The following variables indicating which bindings are present will be
defined:

MPI_MPICXX_FOUND
Variable indicating whether the MPI-2 C++ bindings are present
(introduced in MPI-2, removed with MPI-3).

MPI_Fortran_HAVE_F77_HEADER
True if the Fortran 77 header mpif.h is available.

MPI_Fortran_HAVE_F90_MODULE
True if the Fortran 90 module mpi can be used for accessing MPI
(MPI-2 and higher only).

MPI_Fortran_HAVE_F08_MODULE
True if the Fortran 2008 mpi_f08 is available to MPI programs
(MPI-3 and higher only).

If possible, the MPI version will be determined by this module. The
facilities to detect the MPI version were introduced with MPI-1.2, and
therefore cannot be found for older MPI versions.

MPI_<lang>_VERSION_MAJOR
Major version of MPI implemented for <lang> by the MPI
distribution.

MPI_<lang>_VERSION_MINOR
Minor version of MPI implemented for <lang> by the MPI
distribution.

MPI_<lang>_VERSION
MPI version implemented for <lang> by the MPI distribution.

Note that there's no variable for the C bindings being accessible
through mpi.h, since the MPI standards always have required this
binding to work in both C and C++ code.

For running MPI programs, the module sets the following variables

MPIEXEC_EXECUTABLE
Executable for running MPI programs, if such exists.

MPIEXEC_NUMPROC_FLAG
Flag to pass to mpiexec before giving it the number of
processors to run on.

MPIEXEC_MAX_NUMPROCS
Number of MPI processors to utilize. Defaults to the number of
processors detected on the host system.

MPIEXEC_PREFLAGS
Flags to pass to mpiexec directly before the executable to run.

MPIEXEC_POSTFLAGS
Flags to pass to mpiexec after other flags.

Variables for locating MPI
This module performs a four step search for an MPI implementation:

1. Search for MPIEXEC_EXECUTABLE and, if found, use its base directory.

2. Check if the compiler has MPI support built-in. This is the case if
the user passed a compiler wrapper as CMAKE_<LANG>_COMPILER or if
they use Cray system compiler wrappers.

3. Attempt to find an MPI compiler wrapper and determine the compiler
information from it.

4. Try to find an MPI implementation that does not ship such a wrapper
by guessing settings. Currently, only Microsoft MPI and MPICH2 on
Windows are supported.

For controlling the MPIEXEC_EXECUTABLE step, the following variables
may be set:

MPIEXEC_EXECUTABLE
Manually specify the location of mpiexec.

MPI_HOME
Specify the base directory of the MPI installation.

ENV{MPI_HOME}
Environment variable to specify the base directory of the MPI
installation.

ENV{I_MPI_ROOT}
Environment variable to specify the base directory of the MPI
installation.

For controlling the compiler wrapper step, the following variables may
be set:

MPI_<lang>_COMPILER
Search for the specified compiler wrapper and use it.

MPI_<lang>_COMPILER_FLAGS
Flags to pass to the MPI compiler wrapper during interrogation.
Some compiler wrappers support linking debug or tracing
libraries if a specific flag is passed and this variable may be
used to obtain them.

MPI_COMPILER_FLAGS
Used to initialize MPI_<lang>_COMPILER_FLAGS if no language
specific flag has been given. Empty by default.

MPI_EXECUTABLE_SUFFIX
A suffix which is appended to all names that are being looked
for. For instance you may set this to .mpich or .openmpi to
prefer the one or the other on Debian and its derivatives.

In order to control the guessing step, the following variable may be
set:

MPI_GUESS_LIBRARY_NAME
Valid values are MSMPI and MPICH2. If set, only the given
library will be searched for. By default, MSMPI will be
preferred over MPICH2 if both are available. This also sets
MPI_SKIP_COMPILER_WRAPPER to true, which may be overridden.

Each of the search steps may be skipped with the following control
variables:

MPI_ASSUME_NO_BUILTIN_MPI
If true, the module assumes that the compiler itself does not
provide an MPI implementation and skips to step 2.

MPI_SKIP_COMPILER_WRAPPER
If true, no compiler wrapper will be searched for.

MPI_SKIP_GUESSING
If true, the guessing step will be skipped.

Additionally, the following control variable is available to change
search behavior:

MPI_CXX_SKIP_MPICXX
Add some definitions that will disable the MPI-2 C++ bindings.
Currently supported are MPICH, Open MPI, Platform MPI and
derivatives thereof, for example MVAPICH or Intel MPI.

If the find procedure fails for a variable MPI_<lang>_WORKS, then the
settings detected by or passed to the module did not work and even a
simple MPI test program failed to compile.

If all of these parameters were not sufficient to find the right MPI
implementation, a user may disable the entire autodetection process by
specifying both a list of libraries in MPI_<lang>_LIBRARIES and a list
of include directories in MPI_<lang>_ADDITIONAL_INCLUDE_DIRS. Any
other variable may be set in addition to these two. The module will
then validate the MPI settings and store the settings in the cache.

Cache variables for MPI
The variable MPI_<lang>_INCLUDE_DIRS will be assembled from the
following variables. For C and CXX:

MPI_<lang>_HEADER_DIR
Location of the mpi.h header on disk.

For Fortran:

MPI_Fortran_F77_HEADER_DIR
Location of the Fortran 77 header mpif.h, if it exists.

MPI_Fortran_MODULE_DIR
Location of the mpi or mpi_f08 modules, if available.

For all languages the following variables are additionally considered:

MPI_<lang>_ADDITIONAL_INCLUDE_DIRS
A ;-list of paths needed in addition to the normal include
directories.

MPI_<include_name>_INCLUDE_DIR
Path variables for include folders referred to by
<include_name>.

MPI_<lang>_ADDITIONAL_INCLUDE_VARS
A ;-list of <include_name> that will be added to the include
locations of <lang>.

The variable MPI_<lang>_LIBRARIES will be assembled from the following
variables:

MPI_<lib_name>_LIBRARY
The location of a library called <lib_name> for use with MPI.

MPI_<lang>_LIB_NAMES
A ;-list of <lib_name> that will be added to the include
locations of <lang>.

Usage of mpiexec
When using MPIEXEC_EXECUTABLE to execute MPI applications, you should
typically use all of the MPIEXEC_EXECUTABLE flags as follows:

${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} ${MPIEXEC_MAX_NUMPROCS}
${MPIEXEC_PREFLAGS} EXECUTABLE ${MPIEXEC_POSTFLAGS} ARGS

where EXECUTABLE is the MPI program, and ARGS are the arguments to pass
to the MPI program.

Advanced variables for using MPI
The module can perform some advanced feature detections upon explicit
request.

Important notice: The following checks cannot be performed without
executing an MPI test program. Consider the special considerations for
the behavior of try_run() during cross compilation. Moreover, running
an MPI program can cause additional issues, like a firewall
notification on some systems. You should only enable these detections
if you absolutely need the information.

If the following variables are set to true, the respective search will
be performed:

MPI_DETERMINE_Fortran_CAPABILITIES
Determine for all available Fortran bindings what the values of
MPI_SUBARRAYS_SUPPORTED and MPI_ASYNC_PROTECTS_NONBLOCKING are
and make their values available as
MPI_Fortran_<binding>_SUBARRAYS and
MPI_Fortran_<binding>_ASYNCPROT, where <binding> is one of
F77_HEADER, F90_MODULE and F08_MODULE.

MPI_DETERMINE_LIBRARY_VERSION
For each language, find the output of MPI_Get_library_version
and make it available as MPI_<lang>_LIBRARY_VERSION_STRING.
This information is usually tied to the runtime component of an
MPI implementation and might differ depending on <lang>. Note
that the return value is entirely implementation defined. This
information might be used to identify the MPI vendor and for
example pick the correct one of multiple third party binaries
that matches the MPI vendor.

Backward Compatibility
Deprecated since version 3.10.

For backward compatibility with older versions of FindMPI, these
variables are set:

MPI_COMPILER MPI_LIBRARY MPI_EXTRA_LIBRARY
MPI_COMPILE_FLAGS MPI_INCLUDE_PATH MPI_LINK_FLAGS
MPI_LIBRARIES

In new projects, please use the MPI_<lang>_XXX equivalents.
Additionally, the following variables are deprecated:

MPI_<lang>_COMPILE_FLAGS
Use MPI_<lang>_COMPILE_OPTIONS and
MPI_<lang>_COMPILE_DEFINITIONS instead.

MPI_<lang>_INCLUDE_PATH
For consumption use MPI_<lang>_INCLUDE_DIRS and for specifying
folders use MPI_<lang>_ADDITIONAL_INCLUDE_DIRS instead.

MPIEXEC
Use MPIEXEC_EXECUTABLE instead.

FindMsys
Added in version 3.21.

Find MSYS, a POSIX-compatible environment that runs natively on
Microsoft Windows

FindODBC
Added in version 3.12.

Find an Open Database Connectivity (ODBC) include directory and
library.

On Windows, when building with Visual Studio, this module assumes the
ODBC library is provided by the available Windows SDK.

On Unix, this module allows to search for ODBC library provided by
unixODBC or iODBC implementations of ODBC API. This module reads hint
about location of the config program:

ODBC_CONFIG
Location of odbc_config or iodbc-config program

Otherwise, this module tries to find the config program, first from
unixODBC, then from iODBC. If no config program found, this module
searches for ODBC header and library in list of known locations.

Imported targets
This module defines the following IMPORTED targets:

ODBC::ODBC
Imported target for using the ODBC library, if found.

Result variables

ODBC_FOUND
Set to true if ODBC library found, otherwise false or undefined.

ODBC_INCLUDE_DIRS
Paths to include directories listed in one variable for use by
ODBC client. May be empty on Windows, where the include
directory corresponding to the expected Windows SDK is already
available in the compilation environment.

ODBC_LIBRARIES
Paths to libraries to linked against to use ODBC. May just a
library name on Windows, where the library directory
corresponding to the expected Windows SDK is already available
in the compilation environment.

ODBC_CONFIG
Path to unixODBC or iODBC config program, if found or specified.

Cache variables
For users who wish to edit and control the module behavior, this module
reads hints about search locations from the following variables:

ODBC_INCLUDE_DIR
Path to ODBC include directory with sql.h header.

ODBC_LIBRARY
Path to ODBC library to be linked.

These variables should not be used directly by project code.

Limitations
On Windows, this module does not search for iODBC. On Unix, there is
no way to prefer unixODBC over iODBC, or vice versa, other than
providing the config program location using the ODBC_CONFIG. This
module does not allow to search for a specific ODBC driver.

FindOpenACC
Added in version 3.10.

Detect OpenACC support by the compiler.

This module can be used to detect OpenACC support in a compiler. If
the compiler supports OpenACC, the flags required to compile with
OpenACC support are returned in variables for the different languages.
Currently, only NVHPC, PGI, GNU and Cray compilers are supported.

Imported Targets
Added in version 3.16.

The module provides IMPORTED targets:

OpenACC::OpenACC_<lang>
Target for using OpenACC from <lang>.

Variables
The module defines the following variables:

OpenACC_FOUND
Added in version 3.25.

Variable indicating that OpenACC flags for at least one
languages have been found.

This module will set the following variables per language in your
project, where <lang> is one of C, CXX, or Fortran:

OpenACC_<lang>_FOUND
Variable indicating if OpenACC support for <lang> was detected.

OpenACC_<lang>_FLAGS
OpenACC compiler flags for <lang>, separated by spaces.

OpenACC_<lang>_OPTIONS
Added in version 3.16.

OpenACC compiler flags for <lang>, as a list. Suitable for usage
with target_compile_options or target_link_options.

The module will also try to provide the OpenACC version variables:

OpenACC_<lang>_SPEC_DATE
Date of the OpenACC specification implemented by the <lang>
compiler.

OpenACC_<lang>_VERSION_MAJOR
Major version of OpenACC implemented by the <lang> compiler.

OpenACC_<lang>_VERSION_MINOR
Minor version of OpenACC implemented by the <lang> compiler.

OpenACC_<lang>_VERSION
OpenACC version implemented by the <lang> compiler.

The specification date is formatted as given in the OpenACC standard:
yyyymm where yyyy and mm represents the year and month of the OpenACC
specification implemented by the <lang> compiler.

Input Variables
OpenACC_ACCEL_TARGET=<target> If set, will the correct target
accelerator flag set to the <target> will be returned with
OpenACC_<lang>_FLAGS.

FindOpenAL
Finds Open Audio Library (OpenAL).

Projects using this module should use #include "al.h" to include the
OpenAL header file, not #include <AL/al.h>. The reason for this is
that the latter is not entirely portable. Windows/Creative Labs does
not by default put their headers in AL/ and macOS uses the convention
<OpenAL/al.h>.

Hints
Environment variable $OPENALDIR can be used to set the prefix of OpenAL
installation to be found.

By default on macOS, system framework is search first. In other words,
OpenAL is searched in the following order:

1. System framework: /System/Library/Frameworks, whose priority can be
changed via setting the CMAKE_FIND_FRAMEWORK variable.

2. Environment variable $OPENALDIR.

3. System paths.

4. User-compiled framework: ~/Library/Frameworks.

5. Manually compiled framework: /Library/Frameworks.

6. Add-on package: /opt.

IMPORTED Targets
Added in version 3.25.

This module defines the IMPORTED target:

OpenAL::OpenAL
The OpenAL library, if found.

Result Variables
This module defines the following variables:

OPENAL_FOUND
If false, do not try to link to OpenAL

OPENAL_INCLUDE_DIR
OpenAL include directory

OPENAL_LIBRARY
Path to the OpenAL library

OPENAL_VERSION_STRING
Human-readable string containing the version of OpenAL

FindOpenCL
Added in version 3.1.

Finds Open Computing Language (OpenCL)

Added in version 3.10: Detection of OpenCL 2.1 and 2.2.

IMPORTED Targets
Added in version 3.7.

This module defines IMPORTED target OpenCL::OpenCL, if OpenCL has been
found.

Result Variables
This module defines the following variables:

OpenCL_FOUND - True if OpenCL was found
OpenCL_INCLUDE_DIRS - include directories for OpenCL
OpenCL_LIBRARIES - link against this library to use OpenCL
OpenCL_VERSION_STRING - Highest supported OpenCL version (eg. 1.2)
OpenCL_VERSION_MAJOR - The major version of the OpenCL implementation
OpenCL_VERSION_MINOR - The minor version of the OpenCL implementation

The module will also define two cache variables:

OpenCL_INCLUDE_DIR - the OpenCL include directory
OpenCL_LIBRARY - the path to the OpenCL library

FindOpenGL
FindModule for OpenGL and OpenGL Utility Library (GLU).

Changed in version 3.2: X11 is no longer added as a dependency on
Unix/Linux systems.

Added in version 3.10: GLVND support on Linux. See the Linux-specific
section below.

Optional COMPONENTS
Added in version 3.10.

This module respects several optional COMPONENTS:

EGL The EGL interface between OpenGL, OpenGL ES and the underlying
windowing system.

GLX An extension to X that interfaces OpenGL, OpenGL ES with X
window system.

OpenGL The cross platform API for 3D graphics.

GLES2 Added in version 3.27.

A subset of OpenGL API for embedded systems with limited
capabilities.

GLES3 Added in version 3.27.

A subset of OpenGL API for embedded systems with more
capabilities.

IMPORTED Targets
Added in version 3.8.

This module defines the IMPORTED targets:

OpenGL::GL
Defined to the platform-specific OpenGL libraries if the system
has OpenGL.

OpenGL::GLU
Defined if the system has OpenGL Utility Library (GLU).

Added in version 3.10: Additionally, the following GLVND-specific
library targets are defined:

OpenGL::OpenGL
Defined to libOpenGL if the system is GLVND-based.

OpenGL::GLX
Defined if the system has OpenGL Extension to the X Window
System (GLX).

OpenGL::EGL
Defined if the system has EGL.

OpenGL::GLES2
Added in version 3.27.

Defined if the system has GLES2.

OpenGL::GLES3
Added in version 3.27.

Defined if the system has GLES3.

Result Variables
This module sets the following variables:

OPENGL_FOUND
True, if the system has OpenGL and all components are found.

OPENGL_XMESA_FOUND
True, if the system has XMESA.

OPENGL_GLU_FOUND
True, if the system has GLU.

OpenGL_OpenGL_FOUND
True, if the system has an OpenGL library.

OpenGL_GLX_FOUND
True, if the system has GLX.

OpenGL_EGL_FOUND
True, if the system has EGL.

OpenGL::GLES2
Defined if the system has GLES2.

OpenGL::GLES3
Defined if the system has GLES3.

OPENGL_INCLUDE_DIR
Path to the OpenGL include directory. The OPENGL_INCLUDE_DIRS
variable is preferred.

OPENGL_EGL_INCLUDE_DIRS
Path to the EGL include directory.

OPENGL_LIBRARIES
Paths to the OpenGL library, windowing system libraries, and GLU
libraries. On Linux, this assumes GLX and is never correct for
EGL-based targets. Clients are encouraged to use the OpenGL::*
import targets instead.

OPENGL_INCLUDE_DIRS
Added in version 3.29.

Paths to the OpenGL include directories.

Added in version 3.10: Variables for GLVND-specific libraries OpenGL,
EGL and GLX.

Cache variables
The following cache variables may also be set:

OPENGL_egl_LIBRARY
Path to the EGL library.

OPENGL_glu_LIBRARY
Path to the GLU library.

OPENGL_glx_LIBRARY
Path to the GLVND 'GLX' library.

OPENGL_opengl_LIBRARY
Path to the GLVND 'OpenGL' library

OPENGL_gl_LIBRARY
Path to the OpenGL library. New code should prefer the
OpenGL::* import targets.

OPENGL_gles2_LIBRARY
Added in version 3.27.

Path to the OpenGL GLES2 library.

OPENGL_gles3_LIBRARY
Added in version 3.27.

Path to the OpenGL GLES3 library.

OPENGL_GLU_INCLUDE_DIR
Added in version 3.29.

Path to the OpenGL GLU include directory.

Added in version 3.10: Variables for GLVND-specific libraries OpenGL,
EGL and GLX.

Linux-specific
Some Linux systems utilize GLVND as a new ABI for OpenGL. GLVND
separates context libraries from OpenGL itself; OpenGL lives in
"libOpenGL", and contexts are defined in "libGLX" or "libEGL". GLVND
is currently the only way to get OpenGL 3+ functionality via EGL in a
manner portable across vendors. Projects may use GLVND explicitly with
target OpenGL::OpenGL and either OpenGL::GLX or OpenGL::EGL.

Projects may use the OpenGL::GL target (or OPENGL_LIBRARIES variable)
to use legacy GL interfaces. These will use the legacy GL library
located by OPENGL_gl_LIBRARY, if available. If OPENGL_gl_LIBRARY is
empty or not found and GLVND is available, the OpenGL::GL target will
use GLVND OpenGL::OpenGL and OpenGL::GLX (and the OPENGL_LIBRARIES
variable will use the corresponding libraries). Thus, for
non-EGL-based Linux targets, the OpenGL::GL target is most portable.

A OpenGL_GL_PREFERENCE variable may be set to specify the preferred way
to provide legacy GL interfaces in case multiple choices are available.
The value may be one of:

GLVND If the GLVND OpenGL and GLX libraries are available, prefer
them. This forces OPENGL_gl_LIBRARY to be empty.

Changed in version 3.11: This is the default, unless policy
CMP0072 is set to OLD and no components are requested (since
components correspond to GLVND libraries).

LEGACY Prefer to use the legacy libGL library, if available.

For EGL targets the client must rely on GLVND support on the user's
system. Linking should use the OpenGL::OpenGL OpenGL::EGL targets.
Using GLES* libraries is theoretically possible in place of
OpenGL::OpenGL, but this module does not currently support that;
contributions welcome.

OPENGL_egl_LIBRARY and OPENGL_EGL_INCLUDE_DIRS are defined in the case
of GLVND. For non-GLVND Linux and other systems these are left
undefined.

macOS-Specific
On macOS this module defaults to using the macOS-native framework
version of OpenGL. To use the X11 version of OpenGL on macOS, one can
disable searching of frameworks. For example:

find_package(X11)
if(APPLE AND X11_FOUND)
set(CMAKE_FIND_FRAMEWORK NEVER)
find_package(OpenGL)
unset(CMAKE_FIND_FRAMEWORK)
else()
find_package(OpenGL)
endif()

An end user building this project may need to point CMake at their X11
installation, e.g., with -DOpenGL_ROOT=/opt/X11.

FindOpenMP
Finds Open Multi-Processing (OpenMP) support.

This module can be used to detect OpenMP support in a compiler. If the
compiler supports OpenMP, the flags required to compile with OpenMP
support are returned in variables for the different languages. The
variables may be empty if the compiler does not need a special flag to
support OpenMP.

Added in version 3.5: Clang support.

Input Variables
The following variables may be set to influence this module's behavior:

OpenMP_RUNTIME_MSVC
Added in version 3.30.

Specify the OpenMP Runtime when compiling with MSVC. If set to
a non-empty value, such as experimental or llvm, it will be
passed as the value of the -openmp: flag.

Result Variables
Added in version 3.10: The module exposes the components C, CXX, and
Fortran. Each of these controls the various languages to search OpenMP
support for.

Added in version 3.31: The CUDA language component is supported when
using a CUDA compiler that supports OpenMP on the host.

Depending on the enabled components the following variables will be
set:

OpenMP_FOUND
Variable indicating that OpenMP flags for all requested
languages have been found. If no components are specified, this
is true if OpenMP settings for all enabled languages were
detected.

OpenMP_VERSION
Minimal version of the OpenMP standard detected among the
requested languages, or all enabled languages if no components
were specified.

This module will set the following variables per language in your
project, where <lang> is one of C, CXX, CUDA, or Fortran:

OpenMP_<lang>_FOUND
Variable indicating if OpenMP support for <lang> was detected.

OpenMP_<lang>_FLAGS
OpenMP compiler flags for <lang>, separated by spaces.

OpenMP_<lang>_INCLUDE_DIRS
Directories that must be added to the header search path for
<lang> when using OpenMP.

For linking with OpenMP code written in <lang>, the following variables
are provided:

OpenMP_<lang>_LIB_NAMES
;-list of libraries for OpenMP programs for <lang>.

OpenMP_<libname>_LIBRARY
Location of the individual libraries needed for OpenMP support
in <lang>.

OpenMP_<lang>_LIBRARIES
A list of libraries needed to link with OpenMP code written in
<lang>.

Additionally, the module provides IMPORTED targets:

OpenMP::OpenMP_<lang>
Target for using OpenMP from <lang>.

Specifically for Fortran, the module sets the following variables:

OpenMP_Fortran_HAVE_OMPLIB_HEADER
Boolean indicating if OpenMP is accessible through omp_lib.h.

OpenMP_Fortran_HAVE_OMPLIB_MODULE
Boolean indicating if OpenMP is accessible through the omp_lib
Fortran module.

The module will also try to provide the OpenMP version variables:

OpenMP_<lang>_SPEC_DATE
Added in version 3.7.

Date of the OpenMP specification implemented by the <lang>
compiler.

OpenMP_<lang>_VERSION_MAJOR
Major version of OpenMP implemented by the <lang> compiler.

OpenMP_<lang>_VERSION_MINOR
Minor version of OpenMP implemented by the <lang> compiler.

OpenMP_<lang>_VERSION
OpenMP version implemented by the <lang> compiler.

The specification date is formatted as given in the OpenMP standard:
yyyymm where yyyy and mm represents the year and month of the OpenMP
specification implemented by the <lang> compiler.

For some compilers, it may be necessary to add a header search path to
find the relevant OpenMP headers. This location may be
language-specific. Where this is needed, the module may attempt to
find the location, but it can be provided directly by setting the
OpenMP_<lang>_INCLUDE_DIR cache variable. Note that this variable is
an _input_ control to the module. Project code should use the
OpenMP_<lang>_INCLUDE_DIRS _output_ variable if it needs to know what
include directories are needed.

FindOpenSceneGraph
Find OpenSceneGraph (3D graphics application programming interface)

This module searches for the OpenSceneGraph core "osg" library as well
as FindOpenThreads, and whatever additional COMPONENTS (nodekits) that
you specify.

See http://www.openscenegraph.org

NOTE: To use this module effectively you must either require CMake >=
2.6.3 with cmake_minimum_required(VERSION 2.6.3) or download and place
FindOpenThreads, Findosg functions, Findosg and Find<etc>.cmake files
into your CMAKE_MODULE_PATH.

----

This module accepts the following variables (note mixed case)

OpenSceneGraph_DEBUG - Enable debugging output

OpenSceneGraph_MARK_AS_ADVANCED - Mark cache variables as advanced
automatically

The following environment variables are also respected for finding the
OSG and it's various components. CMAKE_PREFIX_PATH can also be used
for this (see find_library() CMake documentation).

<MODULE>_DIR
(where MODULE is of the form "OSGVOLUME" and there is a
FindosgVolume.cmake` file)

OSG_DIR

OSGDIR

OSG_ROOT

[CMake 2.8.10]: The CMake variable OSG_DIR can now be used as well to
influence detection, instead of needing to specify an environment
variable.

This module defines the following output variables:

OPENSCENEGRAPH_FOUND - Was the OSG and all of the specified components found?

OPENSCENEGRAPH_VERSION - The version of the OSG which was found

OPENSCENEGRAPH_INCLUDE_DIRS - Where to find the headers

OPENSCENEGRAPH_LIBRARIES - The OSG libraries

================================== Example Usage:

find_package(OpenSceneGraph 2.0.0 REQUIRED osgDB osgUtil)
# libOpenThreads & libosg automatically searched
include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS})

add_executable(foo foo.cc)
target_link_libraries(foo ${OPENSCENEGRAPH_LIBRARIES})

FindOpenSP
Added in version 3.25.

Try to find the OpenSP library.

Result Variables
This will define the following variables:

OpenSP_FOUND
True if (the requested version of) OpenSP is available

OpenSP_VERSION
The version of OpenSP

OpenSP_VERSION_MAJOR
The major version of OpenSP

OpenSP_VERSION_MINOR
The minor version of OpenSP

OpenSP_VERSION_PATCH
The patch version of OpenSP

OpenSP_INCLUDE_DIRS
The include dirs of OpenSP with its headers

OpenSP_LIBRARIES
The OpenSP library for use with target_link_libraries(). This
can be passed to target_link_libraries() instead of the IMPORTED
OpenSP::OpenSP target

OpenSP_MULTI_BYTE
True if SP_MULTI_BYTE was found to be defined in OpenSP's
config.h header file, which indicates that the OpenSP library
was compiled with support for multi-byte characters. The
consuming target needs to define the SP_MULTI_BYTE to match this
value in order to avoid issues with character decoding.

IMPORTED Targets
This module defines the IMPORTED target OpenSP::OpenSP, if OpenSP has
been found.

Cache variables
The following cache variables may also be set:

OpenSP_INCLUDE_DIR
the OpenSP include directory

OpenSP_LIBRARY
the absolute path of the osp library

FindOpenSSL
Find the OpenSSL encryption library.

This module finds an installed OpenSSL library and determines its
version.

Added in version 3.19: When a version is requested, it can be specified
as a simple value or as a range. For a detailed description of version
range usage and capabilities, refer to the find_package() command.

Added in version 3.18: Support for OpenSSL 3.0.

Optional COMPONENTS
Added in version 3.12.

This module supports two optional COMPONENTS: Crypto and SSL. Both
components have associated imported targets, as described below.

Imported Targets
Added in version 3.4.

This module defines the following IMPORTED targets:

OpenSSL::SSL
The OpenSSL ssl library, if found.

OpenSSL::Crypto
The OpenSSL crypto library, if found.

OpenSSL::applink
Added in version 3.18.

The OpenSSL applink components that might be need to be compiled
into projects under MSVC. This target is available only if found
OpenSSL version is not less than 0.9.8. By linking this target
the above OpenSSL targets can be linked even if the project has
different MSVC runtime configurations with the above OpenSSL
targets. This target has no effect on platforms other than MSVC.

NOTE: Due to how INTERFACE_SOURCES are consumed by the consuming
target, unless you certainly know what you are doing, it is always
preferred to link OpenSSL::applink target as PRIVATE and to make sure
that this target is linked at most once for the whole dependency graph
of any library or executable:

target_link_libraries(myTarget PRIVATE OpenSSL::applink)

Otherwise you would probably encounter unexpected random problems when
building and linking, as both the ISO C and the ISO C++ standard claims
almost nothing about what a link process should be.

Result Variables
This module will set the following variables in your project:

OPENSSL_FOUND
System has the OpenSSL library. If no components are requested
it only requires the crypto library.

OPENSSL_INCLUDE_DIR
The OpenSSL include directory.

OPENSSL_CRYPTO_LIBRARY
The OpenSSL crypto library.

OPENSSL_CRYPTO_LIBRARIES
The OpenSSL crypto library and its dependencies.

OPENSSL_SSL_LIBRARY
The OpenSSL SSL library.

OPENSSL_SSL_LIBRARIES
The OpenSSL SSL library and its dependencies.

OPENSSL_LIBRARIES
All OpenSSL libraries and their dependencies.

OPENSSL_VERSION
This is set to $major.$minor.$revision$patch (e.g. 0.9.8s).

OPENSSL_APPLINK_SOURCE
The sources in the target OpenSSL::applink that is mentioned
above. This variable shall always be undefined if found openssl
version is less than 0.9.8 or if platform is not MSVC.

Hints
The following variables may be set to control search behavior:

OPENSSL_ROOT_DIR
Set to the root directory of an OpenSSL installation.

OPENSSL_USE_STATIC_LIBS
Added in version 3.4.

Set to TRUE to look for static libraries.

OPENSSL_MSVC_STATIC_RT
Added in version 3.5.

Set to TRUE to choose the MT version of the lib.

ENV{PKG_CONFIG_PATH}
On UNIX-like systems, pkg-config is used to locate the system
OpenSSL. Set the PKG_CONFIG_PATH environment variable to look
in alternate locations. Useful on multi-lib systems.

FindOpenThreads
OpenThreads is a C++ based threading library. Its largest userbase
seems to OpenSceneGraph so you might notice I accept OSGDIR as an
environment path. I consider this part of the Findosg* suite used to
find OpenSceneGraph components. Each component is separate and you
must opt in to each module.

This module defines:

OPENTHREADS_LIBRARY

OPENTHREADS_FOUND
if false, do not try to link to OpenThreads

OPENTHREADS_INCLUDE_DIR
where to find the headers

$OPENTHREADS_DIR is an environment variable that would correspond to
the:

./configure --prefix=$OPENTHREADS_DIR

used in building osg.

Added in version 2.8.10: The CMake variables OPENTHREADS_DIR or OSG_DIR
can now be used as well to influence detection, instead of needing to
specify an environment variable.

Findosg
NOTE:
It is highly recommended that you use the new FindOpenSceneGraph
introduced in CMake 2.6.3 and not use this Find module directly.

This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osg This module defines:

OSG_FOUND
Was the Osg found?

OSG_INCLUDE_DIR
Where to find theheaders

OSG_LIBRARIES
The libraries to link against for the OSG (use this)

OSG_LIBRARY
The OSG library

OSG_LIBRARY_DEBUG
The OSG debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

Findosg_functions
This CMake file contains two macros to assist with searching for OSG
libraries and nodekits. Please see FindOpenSceneGraph for full
documentation.

FindosgAnimation
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgAnimation This module defines:

OSGANIMATION_FOUND
Was osgAnimation found?

OSGANIMATION_INCLUDE_DIR
Where to find the headers

OSGANIMATION_LIBRARIES
The libraries to link against for the OSG (use this)

OSGANIMATION_LIBRARY
The OSG library

OSGANIMATION_LIBRARY_DEBUG
The OSG debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg. Created by Eric Wing.

FindosgDB
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgDB This module defines:

OSGDB_FOUND
Was osgDB found?

OSGDB_INCLUDE_DIR
Where to find the headers

OSGDB_LIBRARIES
The libraries to link against for the osgDB

OSGDB_LIBRARY
The osgDB library

OSGDB_LIBRARY_DEBUG
The osgDB debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

FindosgFX
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgFX This module defines:

OSGFX_FOUND
Was osgFX found?

OSGFX_INCLUDE_DIR
Where to find the headers

OSGFX_LIBRARIES
The libraries to link against for the osgFX (use this)

OSGFX_LIBRARY
The osgFX library

OSGFX_LIBRARY_DEBUG
The osgFX debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgGA
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgGA This module defines:

OSGGA_FOUND
Was osgGA found?

OSGGA_INCLUDE_DIR
Where to find the headers

OSGGA_LIBRARIES
The libraries to link against for the osgGA (use this)

OSGGA_LIBRARY
The osgGA library

OSGGA_LIBRARY_DEBUG
The osgGA debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgIntrospection
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgINTROSPECTION This module defines:

OSGINTROSPECTION_FOUND
Was osgIntrospection found?

OSGINTROSPECTION_INCLUDE_DIR
Where to find the headers

OSGINTROSPECTION_LIBRARIES
The libraries to link for osgIntrospection (use this)

OSGINTROSPECTION_LIBRARY
The osgIntrospection library

OSGINTROSPECTION_LIBRARY_DEBUG
The osgIntrospection debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgManipulator
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgManipulator This module defines:

OSGMANIPULATOR_FOUND
Was osgManipulator found?

OSGMANIPULATOR_INCLUDE_DIR
Where to find the headers

OSGMANIPULATOR_LIBRARIES
The libraries to link for osgManipulator (use this)

OSGMANIPULATOR_LIBRARY
The osgManipulator library

OSGMANIPULATOR_LIBRARY_DEBUG
The osgManipulator debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgParticle
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgParticle This module defines:

OSGPARTICLE_FOUND
Was osgParticle found?

OSGPARTICLE_INCLUDE_DIR
Where to find the headers

OSGPARTICLE_LIBRARIES
The libraries to link for osgParticle (use this)

OSGPARTICLE_LIBRARY
The osgParticle library

OSGPARTICLE_LIBRARY_DEBUG
The osgParticle debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgPresentation
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgPresentation This module defines:

OSGPRESENTATION_FOUND
Was osgPresentation found?

OSGPRESENTATION_INCLUDE_DIR
Where to find the headers

OSGPRESENTATION_LIBRARIES
The libraries to link for osgPresentation (use this)

OSGPRESENTATION_LIBRARY
The osgPresentation library

OSGPRESENTATION_LIBRARY_DEBUG
The osgPresentation debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg. Created by Eric Wing. Modified to work with
osgPresentation by Robert Osfield, January 2012.

FindosgProducer
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgProducer This module defines:

OSGPRODUCER_FOUND
Was osgProducer found?

OSGPRODUCER_INCLUDE_DIR
Where to find the headers

OSGPRODUCER_LIBRARIES
The libraries to link for osgProducer (use this)

OSGPRODUCER_LIBRARY
The osgProducer library

OSGPRODUCER_LIBRARY_DEBUG
The osgProducer debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgQt
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgQt This module defines:

OSGQT_FOUND
Was osgQt found?

OSGQT_INCLUDE_DIR
Where to find the headers

OSGQT_LIBRARIES
The libraries to link for osgQt (use this)

OSGQT_LIBRARY
The osgQt library

OSGQT_LIBRARY_DEBUG
The osgQt debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing. Modified to work with osgQt by Robert Osfield,
January 2012.

FindosgShadow
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgShadow This module defines:

OSGSHADOW_FOUND
Was osgShadow found?

OSGSHADOW_INCLUDE_DIR
Where to find the headers

OSGSHADOW_LIBRARIES
The libraries to link for osgShadow (use this)

OSGSHADOW_LIBRARY
The osgShadow library

OSGSHADOW_LIBRARY_DEBUG
The osgShadow debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgSim
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgSim This module defines:

OSGSIM_FOUND
Was osgSim found?

OSGSIM_INCLUDE_DIR
Where to find the headers

OSGSIM_LIBRARIES
The libraries to link for osgSim (use this)

OSGSIM_LIBRARY
The osgSim library

OSGSIM_LIBRARY_DEBUG
The osgSim debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgTerrain
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgTerrain This module defines:

OSGTERRAIN_FOUND
Was osgTerrain found?

OSGTERRAIN_INCLUDE_DIR
Where to find the headers

OSGTERRAIN_LIBRARIES
The libraries to link for osgTerrain (use this)

OSGTERRAIN_LIBRARY
The osgTerrain library

OSGTERRAIN_LIBRARY_DEBUG
The osgTerrain debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgText
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgText This module defines:

OSGTEXT_FOUND
Was osgText found?

OSGTEXT_INCLUDE_DIR
Where to find the headers

OSGTEXT_LIBRARIES
The libraries to link for osgText (use this)

OSGTEXT_LIBRARY
The osgText library

OSGTEXT_LIBRARY_DEBUG
The osgText debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgUtil
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgUtil This module defines:

OSGUTIL_FOUND
Was osgUtil found?

OSGUTIL_INCLUDE_DIR
Where to find the headers

OSGUTIL_LIBRARIES
The libraries to link for osgUtil (use this)

OSGUTIL_LIBRARY
The osgUtil library

OSGUTIL_LIBRARY_DEBUG
The osgUtil debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgViewer
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgViewer This module defines:

OSGVIEWER_FOUND
Was osgViewer found?

OSGVIEWER_INCLUDE_DIR
Where to find the headers

OSGVIEWER_LIBRARIES
The libraries to link for osgViewer (use this)

OSGVIEWER_LIBRARY
The osgViewer library

OSGVIEWER_LIBRARY_DEBUG
The osgViewer debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgVolume
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgVolume This module defines:

OSGVOLUME_FOUND
Was osgVolume found?

OSGVOLUME_INCLUDE_DIR
Where to find the headers

OSGVOLUME_LIBRARIES
The libraries to link for osgVolume (use this)

OSGVOLUME_LIBRARY
The osgVolume library

OSGVOLUME_LIBRARY_DEBUG
The osgVolume debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

Created by Eric Wing.

FindosgWidget
This is part of the Findosg* suite used to find OpenSceneGraph
components. Each component is separate and you must opt in to each
module. You must also opt into OpenGL and OpenThreads (and Producer if
needed) as these modules won't do it for you. This is to allow you
control over your own system piece by piece in case you need to opt out
of certain components or change the Find behavior for a particular
module (perhaps because the default FindOpenGL module doesn't work with
your system as an example). If you want to use a more convenient
module that includes everything, use the FindOpenSceneGraph instead of
the Findosg*.cmake modules.

Locate osgWidget This module defines:

OSGWIDGET_FOUND
Was osgWidget found?

OSGWIDGET_INCLUDE_DIR
Where to find the headers

OSGWIDGET_LIBRARIES
The libraries to link for osgWidget (use this)

OSGWIDGET_LIBRARY
The osgWidget library

OSGWIDGET_LIBRARY_DEBUG
The osgWidget debug library

$OSGDIR is an environment variable that would correspond to:

./configure --prefix=$OSGDIR

used in building osg.

FindosgWidget.cmake tweaked from Findosg* suite as created by Eric
Wing.

FindPatch
Added in version 3.10.

The module defines the following variables:

Patch_EXECUTABLE
Path to patch command-line executable.

Patch_FOUND
True if the patch command-line executable was found.

The following IMPORTED targets are also defined:

Patch::patch
The command-line executable.

Example usage:

find_package(Patch)
if(Patch_FOUND)
message("Patch found: ${Patch_EXECUTABLE}")
endif()

FindPerl
Find a Perl interpreter.

This module defines the following variables:

PERL_EXECUTABLE
The full path to Perl.

PERL_FOUND
True if the Perl executable was found.

PERL_VERSION_STRING
Added in version 2.8.8.

The version of Perl found.

FindPerlLibs
Find Perl libraries

This module finds if PERL is installed and determines where the include
files and libraries are. It also determines what the name of the
library is. This code sets the following variables:

PERLLIBS_FOUND = True if perl.h & libperl were found
PERL_INCLUDE_PATH = path to where perl.h is found
PERL_LIBRARY = path to libperl
PERL_EXECUTABLE = full path to the perl binary

The minimum required version of Perl can be specified using the
standard syntax, e.g. find_package(PerlLibs 6.0)

The following variables are also available if needed
(introduced after CMake 2.6.4)

PERL_SITESEARCH = path to the sitesearch install dir (-V:installsitesearch)
PERL_SITEARCH = path to the sitelib install directory (-V:installsitearch)
PERL_SITELIB = path to the sitelib install directory (-V:installsitelib)
PERL_VENDORARCH = path to the vendor arch install directory (-V:installvendorarch)
PERL_VENDORLIB = path to the vendor lib install directory (-V:installvendorlib)
PERL_ARCHLIB = path to the core arch lib install directory (-V:archlib)
PERL_PRIVLIB = path to the core priv lib install directory (-V:privlib)
PERL_UPDATE_ARCHLIB = path to the update arch lib install directory (-V:installarchlib)
PERL_UPDATE_PRIVLIB = path to the update priv lib install directory (-V:installprivlib)
PERL_EXTRA_C_FLAGS = Compilation flags used to build perl

FindPHP4
Find PHP4

This module finds if PHP4 is installed and determines where the include
files and libraries are. It also determines what the name of the
library is. This code sets the following variables:

PHP4_INCLUDE_PATH = path to where php.h can be found
PHP4_EXECUTABLE = full path to the php4 binary

FindPhysFS
Locate PhysFS library This module defines:

PHYSFS_LIBRARY
the name of the library to link against

PHYSFS_FOUND
if false, do not try to link to PHYSFS

PHYSFS_INCLUDE_DIR
where to find physfs.h

$PHYSFSDIR is an environment variable that would correspond to:

./configure --prefix=$PHYSFSDIR

used in building PHYSFS.

FindPike
Find Pike

This module finds if PIKE is installed and determines where the include
files and libraries are. It also determines what the name of the
library is. This code sets the following variables:

PIKE_INCLUDE_PATH = path to where program.h is found
PIKE_EXECUTABLE = full path to the pike binary

FindPkgConfig
A pkg-config module for CMake.

Finds the pkg-config executable and adds the pkg_get_variable(),
pkg_check_modules() and pkg_search_module() commands. The following
variables will also be set:

PKG_CONFIG_FOUND
True if a pkg-config executable was found.

PKG_CONFIG_VERSION_STRING
Added in version 2.8.8.

The version of pkg-config that was found.

PKG_CONFIG_EXECUTABLE
The pathname of the pkg-config program.

PKG_CONFIG_ARGN
Added in version 3.22.

A list of arguments to pass to pkg-config.

Both PKG_CONFIG_EXECUTABLE and PKG_CONFIG_ARGN are initialized by the
module, but may be overridden by the user. See Variables Affecting
Behavior for how these variables are initialized.

pkg_check_modules
Checks for all the given modules, setting a variety of result
variables in the calling scope.

pkg_check_modules(<prefix>
[REQUIRED] [QUIET]
[NO_CMAKE_PATH]
[NO_CMAKE_ENVIRONMENT_PATH]
[IMPORTED_TARGET [GLOBAL]]
<moduleSpec> [<moduleSpec>...])

When the REQUIRED argument is given, the command will fail with
an error if module(s) could not be found.

When the QUIET argument is given, no status messages will be
printed.

Added in version 3.1: The CMAKE_PREFIX_PATH,
CMAKE_FRAMEWORK_PATH, and CMAKE_APPBUNDLE_PATH cache and
environment variables will be added to the pkg-config search
path. The NO_CMAKE_PATH and NO_CMAKE_ENVIRONMENT_PATH arguments
disable this behavior for the cache variables and environment
variables respectively. The PKG_CONFIG_USE_CMAKE_PREFIX_PATH
variable set to FALSE disables this behavior globally.

Added in version 3.6: The IMPORTED_TARGET argument will create
an imported target named PkgConfig::<prefix> that can be passed
directly as an argument to target_link_libraries().

Added in version 3.13: The GLOBAL argument will make the
imported target available in global scope.

Added in version 3.15: Non-library linker options reported by
pkg-config are stored in the INTERFACE_LINK_OPTIONS target
property.

Changed in version 3.18: Include directories specified with
-isystem are stored in the INTERFACE_INCLUDE_DIRECTORIES target
property. Previous versions of CMake left them in the
INTERFACE_COMPILE_OPTIONS property.

Each <moduleSpec> can be either a bare module name or it can be
a module name with a version constraint (operators =, <, >, <=
and >= are supported). The following are examples for a module
named foo with various constraints:

o foo matches any version.

o foo<2 only matches versions before 2.

o foo>=3.1 matches any version from 3.1 or later.

o foo=1.2.3 requires that foo must be exactly version 1.2.3.

The following variables may be set upon return. Two sets of
values exist: One for the common case (<XXX> = <prefix>) and
another for the information pkg-config provides when called with
the --static option (<XXX> = <prefix>_STATIC).

<XXX>_FOUND
set to 1 if module(s) exist

<XXX>_LIBRARIES
only the libraries (without the '-l')

<XXX>_LINK_LIBRARIES
the libraries and their absolute paths

<XXX>_LIBRARY_DIRS
the paths of the libraries (without the '-L')

<XXX>_LDFLAGS
all required linker flags

<XXX>_LDFLAGS_OTHER
all other linker flags

<XXX>_INCLUDE_DIRS
the '-I' preprocessor flags (without the '-I')

<XXX>_CFLAGS
all required cflags

<XXX>_CFLAGS_OTHER
the other compiler flags

All but <XXX>_FOUND may be a ;-list if the associated variable
returned from pkg-config has multiple values.

Changed in version 3.18: Include directories specified with
-isystem are stored in the <XXX>_INCLUDE_DIRS variable.
Previous versions of CMake left them in <XXX>_CFLAGS_OTHER.

There are some special variables whose prefix depends on the
number of <moduleSpec> given. When there is only one
<moduleSpec>, <YYY> will simply be <prefix>, but if two or more
<moduleSpec> items are given, <YYY> will be
<prefix>_<moduleName>.

<YYY>_VERSION
version of the module

<YYY>_PREFIX
prefix directory of the module

<YYY>_INCLUDEDIR
include directory of the module

<YYY>_LIBDIR
lib directory of the module

Changed in version 3.8: For any given <prefix>,
pkg_check_modules() can be called multiple times with different
parameters. Previous versions of CMake cached and returned the
first successful result.

Changed in version 3.16: If a full path to the found library
can't be determined, but it's still visible to the linker, pass
it through as -l<name>. Previous versions of CMake failed in
this case.

Examples:

pkg_check_modules (GLIB2 glib-2.0)

Looks for any version of glib2. If found, the output variable
GLIB2_VERSION will hold the actual version found.

pkg_check_modules (GLIB2 glib-2.0>=2.10)

Looks for at least version 2.10 of glib2. If found, the output
variable GLIB2_VERSION will hold the actual version found.

pkg_check_modules (FOO glib-2.0>=2.10 gtk+-2.0)

Looks for both glib2-2.0 (at least version 2.10) and any version
of gtk2+-2.0. Only if both are found will FOO be considered
found. The FOO_glib-2.0_VERSION and FOO_gtk+-2.0_VERSION
variables will be set to their respective found module versions.

pkg_check_modules (XRENDER REQUIRED xrender)

Requires any version of xrender. Example output variables set
by a successful call:

XRENDER_LIBRARIES=Xrender;X11
XRENDER_STATIC_LIBRARIES=Xrender;X11;pthread;Xau;Xdmcp

pkg_search_module
The behavior of this command is the same as pkg_check_modules(),
except that rather than checking for all the specified modules,
it searches for just the first successful match.

pkg_search_module(<prefix>
[REQUIRED] [QUIET]
[NO_CMAKE_PATH]
[NO_CMAKE_ENVIRONMENT_PATH]
[IMPORTED_TARGET [GLOBAL]]
<moduleSpec> [<moduleSpec>...])

Added in version 3.16: If a module is found, the
<prefix>_MODULE_NAME variable will contain the name of the
matching module. This variable can be used if you need to run
pkg_get_variable().

Example:

pkg_search_module (BAR libxml-2.0 libxml2 libxml>=2)

pkg_get_variable
Added in version 3.4.

Retrieves the value of a pkg-config variable varName and stores
it in the result variable resultVar in the calling scope.

pkg_get_variable(<resultVar> <moduleName> <varName>
[DEFINE_VARIABLES <key>=<value>...])

If pkg-config returns multiple values for the specified
variable, resultVar will contain a ;-list.

Options:

DEFINE_VARIABLES <key>=<value>...
Added in version 3.28.

Specify key-value pairs to redefine variables affecting
the variable retrieved with pkg-config.

For example:

pkg_get_variable(GI_GIRDIR gobject-introspection-1.0 girdir)

Variables Affecting Behavior

PKG_CONFIG_EXECUTABLE
This cache variable can be set to the path of the pkg-config
executable. find_program() is called internally by the module
with this variable.

Added in version 3.1: The PKG_CONFIG environment variable can be
used as a hint if PKG_CONFIG_EXECUTABLE has not yet been set.

Changed in version 3.22: If the PKG_CONFIG environment variable
is set, only the first argument is taken from it when using it
as a hint.

PKG_CONFIG_ARGN
Added in version 3.22.

This cache variable can be set to a list of arguments to
additionally pass to pkg-config if needed. If not provided, it
will be initialized from the PKG_CONFIG environment variable, if
set. The first argument in that environment variable is assumed
to be the pkg-config program, while all remaining arguments
after that are used to initialize PKG_CONFIG_ARGN. If no such
environment variable is defined, PKG_CONFIG_ARGN is initialized
to an empty string. The module does not update the variable once
it has been set in the cache.

PKG_CONFIG_USE_CMAKE_PREFIX_PATH
Added in version 3.1.

Specifies whether pkg_check_modules() and pkg_search_module()
should add the paths in the CMAKE_PREFIX_PATH,
CMAKE_FRAMEWORK_PATH and CMAKE_APPBUNDLE_PATH cache and
environment variables to the pkg-config search path.

If this variable is not set, this behavior is enabled by default
if CMAKE_MINIMUM_REQUIRED_VERSION is 3.1 or later, disabled
otherwise.

FindPNG
Find libpng, the official reference library for the PNG image format.

Imported targets
Added in version 3.5.

This module defines the following IMPORTED target:

PNG::PNG
The libpng library, if found.

Result variables
This module will set the following variables in your project:

PNG_INCLUDE_DIRS
where to find png.h, etc.

PNG_LIBRARIES
the libraries to link against to use PNG.

PNG_DEFINITIONS
You should add_definitions(${PNG_DEFINITIONS}) before compiling
code that includes png library files.

PNG_FOUND
If false, do not try to use PNG.

PNG_VERSION_STRING
the version of the PNG library found (since CMake 2.8.8)

Obsolete variables
The following variables may also be set, for backwards compatibility:

PNG_LIBRARY
where to find the PNG library.

PNG_INCLUDE_DIR
where to find the PNG headers (same as PNG_INCLUDE_DIRS)

Since PNG depends on the ZLib compression library, none of the above
will be defined unless ZLib can be found.

FindPostgreSQL
Find the PostgreSQL installation.

IMPORTED Targets
Added in version 3.14.

This module defines IMPORTED target PostgreSQL::PostgreSQL if
PostgreSQL has been found.

Result Variables
This module will set the following variables in your project:

PostgreSQL_FOUND
True if PostgreSQL is found.

PostgreSQL_LIBRARIES
the PostgreSQL libraries needed for linking

PostgreSQL_INCLUDE_DIRS
the directories of the PostgreSQL headers

PostgreSQL_LIBRARY_DIRS
the link directories for PostgreSQL libraries

PostgreSQL_VERSION_STRING
the version of PostgreSQL found

PostgreSQL_TYPE_INCLUDE_DIR
the directories of the PostgreSQL server headers

Components
This module contains additional Server component, that forcibly checks
for the presence of server headers. Note that
PostgreSQL_TYPE_INCLUDE_DIR is set regardless of the presence of the
Server component in find_package call.

FindProducer
Though Producer isn't directly part of OpenSceneGraph, its primary user
is OSG so I consider this part of the Findosg* suite used to find
OpenSceneGraph components. You'll notice that I accept OSGDIR as an
environment path.

Each component is separate and you must opt in to each module. You
must also opt into OpenGL (and OpenThreads?) as these modules won't do
it for you. This is to allow you control over your own system piece by
piece in case you need to opt out of certain components or change the
Find behavior for a particular module (perhaps because the default
FindOpenGL module doesn't work with your system as an example). If you
want to use a more convenient module that includes everything, use the
FindOpenSceneGraph instead of the Findosg*.cmake modules.

Locate Producer This module defines:

PRODUCER_LIBRARY

PRODUCER_FOUND
if false, do not try to link to Producer

PRODUCER_INCLUDE_DIR
where to find the headers

$PRODUCER_DIR is an environment variable that would correspond to:

./configure --prefix=$PRODUCER_DIR

used in building osg.

FindProtobuf
Locate and configure the Google Protocol Buffers library.

Added in version 3.6: Support for find_package() version checks.

Changed in version 3.6: All input and output variables use the
Protobuf_ prefix. Variables with PROTOBUF_ prefix are still supported
for compatibility.

The following variables can be set and are optional:

Protobuf_SRC_ROOT_FOLDER
When compiling with MSVC, if this cache variable is set the
protobuf-default VS project build locations (vsprojects/Debug
and vsprojects/Release or vsprojects/x64/Debug and
vsprojects/x64/Release) will be searched for libraries and
binaries.

Protobuf_IMPORT_DIRS
List of additional directories to be searched for imported
.proto files.

Protobuf_DEBUG
Added in version 3.6.

Show debug messages.

Protobuf_USE_STATIC_LIBS
Added in version 3.9.

Set to ON to force the use of the static libraries. Default is
OFF.

Defines the following variables:

Protobuf_FOUND
Found the Google Protocol Buffers library (libprotobuf & header
files)

Protobuf_VERSION
Added in version 3.6.

Version of package found.

Protobuf_INCLUDE_DIRS
Include directories for Google Protocol Buffers

Protobuf_LIBRARIES
The protobuf libraries

Protobuf_PROTOC_LIBRARIES
The protoc libraries

Protobuf_LITE_LIBRARIES
The protobuf-lite libraries

Added in version 3.9: The following IMPORTED targets are also defined:

protobuf::libprotobuf
The protobuf library.

protobuf::libprotobuf-lite
The protobuf lite library.

protobuf::libprotoc
The protoc library.

protobuf::protoc
Added in version 3.10: The protoc compiler.

The following cache variables are also available to set or use:

Protobuf_LIBRARY
The protobuf library

Protobuf_PROTOC_LIBRARY
The protoc library

Protobuf_INCLUDE_DIR
The include directory for protocol buffers

Protobuf_PROTOC_EXECUTABLE
The protoc compiler

Protobuf_LIBRARY_DEBUG
The protobuf library (debug)

Protobuf_PROTOC_LIBRARY_DEBUG
The protoc library (debug)

Protobuf_LITE_LIBRARY
The protobuf lite library

Protobuf_LITE_LIBRARY_DEBUG
The protobuf lite library (debug)

Example:

find_package(Protobuf REQUIRED)
include_directories(${Protobuf_INCLUDE_DIRS})
include_directories(${CMAKE_CURRENT_BINARY_DIR})
protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS foo.proto)
protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS EXPORT_MACRO DLL_EXPORT foo.proto)
protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS DESCRIPTORS PROTO_DESCS foo.proto)
protobuf_generate_python(PROTO_PY foo.proto)
add_executable(bar bar.cc ${PROTO_SRCS} ${PROTO_HDRS})
target_link_libraries(bar ${Protobuf_LIBRARIES})

NOTE:
The protobuf_generate_cpp and protobuf_generate_python functions and
add_executable() or add_library() calls only work properly within
the same directory.

protobuf_generate_cpp
Add custom commands to process .proto files to C++:

protobuf_generate_cpp (<SRCS> <HDRS>
[DESCRIPTORS <DESC>] [EXPORT_MACRO <MACRO>] [<ARGN>...])

SRCS Variable to define with autogenerated source files

HDRS Variable to define with autogenerated header files

DESCRIPTORS
Added in version 3.10: Variable to define with
autogenerated descriptor files, if requested.

EXPORT_MACRO
is a macro which should expand to __declspec(dllexport)
or __declspec(dllimport) depending on what is being
compiled.

ARGN .proto files

protobuf_generate_python
Added in version 3.4.

Add custom commands to process .proto files to Python:

protobuf_generate_python (<PY> [<ARGN>...])

PY Variable to define with autogenerated Python files

ARGN .proto files

protobuf_generate
Added in version 3.13.

Automatically generate source files from .proto schema files at
build time:

protobuf_generate (
TARGET <target>
[LANGUAGE <lang>]
[OUT_VAR <out_var>]
[EXPORT_MACRO <macro>]
[PROTOC_OUT_DIR <dir>]
[PLUGIN <plugin>]
[PLUGIN_OPTIONS <plugin_options>]
[DEPENDENCIES <depends]
[PROTOS <protobuf_files>]
[IMPORT_DIRS <dirs>]
[GENERATE_EXTENSIONS <extensions>]
[PROTOC_OPTIONS <protoc_options>]
[APPEND_PATH])

APPEND_PATH
A flag that causes the base path of all proto schema
files to be added to IMPORT_DIRS.

LANGUAGE
A single value: cpp or python. Determines what kind of
source files are being generated. Defaults to cpp.

OUT_VAR
Name of a CMake variable that will be filled with the
paths to the generated source files.

EXPORT_MACRO
Name of a macro that is applied to all generated Protobuf
message classes and extern variables. It can, for
example, be used to declare DLL exports.

PROTOC_OUT_DIR
Output directory of generated source files. Defaults to
CMAKE_CURRENT_BINARY_DIR.

PLUGIN Added in version 3.21.

An optional plugin executable. This could, for example,
be the path to grpc_cpp_plugin.

PLUGIN_OPTIONS
Added in version 3.28.

Additional options provided to the plugin, such as
generate_mock_code=true for the gRPC cpp plugin.

DEPENDENCIES
Added in version 3.28.

Arguments forwarded to the DEPENDS of the underlying
add_custom_command invocation.

TARGET CMake target that will have the generated files added as
sources.

PROTOS List of proto schema files. If omitted, then every source
file ending in proto of TARGET will be used.

IMPORT_DIRS
A common parent directory for the schema files. For
example, if the schema file is
proto/helloworld/helloworld.proto and the import
directory proto/ then the generated files are
${PROTOC_OUT_DIR}/helloworld/helloworld.pb.h and
${PROTOC_OUT_DIR}/helloworld/helloworld.pb.cc.

GENERATE_EXTENSIONS
If LANGUAGE is omitted then this must be set to the
extensions that protoc generates.

PROTOC_OPTIONS
Added in version 3.28.

Additional arguments that are forwarded to protoc.

Example:

find_package(gRPC CONFIG REQUIRED)
find_package(Protobuf REQUIRED)
add_library(ProtoTest Test.proto)
target_link_libraries(ProtoTest PUBLIC gRPC::grpc++)
protobuf_generate(TARGET ProtoTest)
protobuf_generate(
TARGET ProtoTest
LANGUAGE grpc
PLUGIN protoc-gen-grpc=$<TARGET_FILE:gRPC::grpc_cpp_plugin>
PLUGIN_OPTIONS generate_mock_code=true
GENERATE_EXTENSIONS .grpc.pb.h .grpc.pb.cc)

FindPython
Added in version 3.12.

Find Python interpreter, compiler and development environment (include
directories and libraries).

The following components are supported:

o Interpreter: search for Python interpreter.

o Compiler: search for Python compiler. Only offered by IronPython.

o Development: search for development artifacts (include directories
and libraries).

Added in version 3.18: This component includes two sub-components
which can be specified independently:

o Development.Module: search for artifacts for Python module
developments.

o Development.Embed: search for artifacts for Python embedding
developments.

Added in version 3.26:

o Development.SABIModule: search for artifacts for Python module
developments using the Stable Application Binary Interface. This
component is available only for version 3.2 and upper.

o NumPy: search for NumPy include directories.

Added in version 3.14: Added the NumPy component.

If no COMPONENTS are specified, Interpreter is assumed.

If component Development is specified, it implies sub-components
Development.Module and Development.Embed.

To ensure consistent versions between components Interpreter, Compiler,
Development (or one of its sub-components) and NumPy, specify all
components at the same time:

find_package (Python COMPONENTS Interpreter Development)

This module looks preferably for version 3 of Python. If not found,
version 2 is searched. To manage concurrent versions 3 and 2 of
Python, use FindPython3 and FindPython2 modules rather than this one.

NOTE:
If components Interpreter and Development (or one of its
sub-components) are both specified, this module search only for
interpreter with same platform architecture as the one defined by
CMake configuration. This constraint does not apply if only
Interpreter component is specified.

Imported Targets
This module defines the following Imported Targets:

Changed in version 3.14: Imported Targets are only created when
CMAKE_ROLE is PROJECT.

Python::Interpreter
Python interpreter. This target is defined only if the
Interpreter component is found.

Python::InterpreterDebug
Added in version 3.30.

Python debug interpreter. This target is defined only if the
Interpreter component is found and the Python_EXECUTABLE_DEBUG
variable is defined. The target is only defined on the Windows
platform.

Python::InterpreterMultiConfig
Added in version 3.30.

Python interpreter. The release or debug version of the
interpreter will be used, based on the context (platform,
configuration). This target is defined only if the Interpreter
component is found

Python::Compiler
Python compiler. This target is defined only if the Compiler
component is found.

Python::Module
Added in version 3.15.

Python library for Python module. Target defined if component
Development.Module is found.

Python::SABIModule
Added in version 3.26.

Python library for Python module using the Stable Application
Binary Interface. Target defined if component
Development.SABIModule is found.

Python::Python
Python library for Python embedding. Target defined if component
Development.Embed is found.

Python::NumPy
Added in version 3.14.

NumPy Python library. Target defined if component NumPy is
found.

Result Variables
This module will set the following variables in your project (see
Standard Variable Names):

Python_FOUND
System has the Python requested components.

Python_Interpreter_FOUND
System has the Python interpreter.

Python_EXECUTABLE
Path to the Python interpreter.

Python_EXECUTABLE_DEBUG
Added in version 3.30.

Path to the debug Python interpreter. It is only defined on the
Windows platform.

Python_INTERPRETER
Added in version 3.30.

Path to the Python interpreter, defined as a generator
expression selecting the Python_EXECUTABLE or
Python_EXECUTABLE_DEBUG variable based on the context (platform,
configuration).

Python_INTERPRETER_ID

A short string unique to the interpreter. Possible values
include:

o Python

o ActivePython

o Anaconda

o Canopy

o IronPython

o PyPy

Python_STDLIB
Standard platform independent installation directory.

Information returned by sysconfig.get_path('stdlib').

Python_STDARCH
Standard platform dependent installation directory.

Information returned by sysconfig.get_path('platstdlib').

Python_SITELIB
Third-party platform independent installation directory.

Information returned by sysconfig.get_path('purelib').

Python_SITEARCH
Third-party platform dependent installation directory.

Information returned by sysconfig.get_path('platlib').

Python_SOABI
Added in version 3.17.

Extension suffix for modules.

Information computed from sysconfig.get_config_var('EXT_SUFFIX')
or sysconfig.get_config_var('SOABI') or python3-config
--extension-suffix.

Python_SOSABI
Added in version 3.26.

Extension suffix for modules using the Stable Application Binary
Interface.

Information computed from importlib.machinery.EXTENSION_SUFFIXES
if the COMPONENT Interpreter was specified. Otherwise, the
extension is abi3 except for Windows, MSYS and CYGWIN for which
this is an empty string.

Python_Compiler_FOUND
System has the Python compiler.

Python_COMPILER
Path to the Python compiler. Only offered by IronPython.

Python_COMPILER_ID

A short string unique to the compiler. Possible values include:

o IronPython

Python_DOTNET_LAUNCHER
Added in version 3.18.

The .Net interpreter. Only used by IronPython implementation.

Python_Development_FOUND
System has the Python development artifacts.

Python_Development.Module_FOUND
Added in version 3.18.

System has the Python development artifacts for Python module.

Python_Development.SABIModule_FOUND
Added in version 3.26.

System has the Python development artifacts for Python module
using the Stable Application Binary Interface.

Python_Development.Embed_FOUND
Added in version 3.18.

System has the Python development artifacts for Python
embedding.

Python_INCLUDE_DIRS
The Python include directories.

Python_DEFINITIONS
Added in version 3.30.3.

The Python preprocessor definitions.

Python_DEBUG_POSTFIX
Postfix of debug python module. This variable can be used to
define the DEBUG_POSTFIX target property.

Python_LINK_OPTIONS
Added in version 3.19.

The Python link options. Some configurations require specific
link options for a correct build and execution.

Python_LIBRARIES
The Python libraries.

Python_LIBRARY_DIRS
The Python library directories.

Python_RUNTIME_LIBRARY_DIRS
The Python runtime library directories.

Python_SABI_LIBRARIES
Added in version 3.26.

The Python libraries for the Stable Application Binary
Interface.

Python_SABI_LIBRARY_DIRS
Added in version 3.26.

The Python SABI library directories.

Python_RUNTIME_SABI_LIBRARY_DIRS
Added in version 3.26.

The Python runtime SABI library directories.

Python_VERSION
Python version.

Python_VERSION_MAJOR
Python major version.

Python_VERSION_MINOR
Python minor version.

Python_VERSION_PATCH
Python patch version.

Python_PyPy_VERSION
Added in version 3.18.

Python PyPy version.

Python_NumPy_FOUND
Added in version 3.14.

System has the NumPy.

Python_NumPy_INCLUDE_DIRS
Added in version 3.14.

The NumPy include directories.

Python_NumPy_VERSION
Added in version 3.14.

The NumPy version.

Hints

Python_ROOT_DIR
Define the root directory of a Python installation.

Python_USE_STATIC_LIBS

o If not defined, search for shared libraries and static
libraries in that order.

o If set to TRUE, search only for static libraries.

o If set to FALSE, search only for shared libraries.

NOTE:
This hint will be ignored on Windows because static libraries
are not available on this platform.

Python_FIND_ABI
Added in version 3.16.

This variable defines which ABIs, as defined in PEP 3149, should
be searched.

NOTE:
This hint will be honored only when searched for Python
version 3.

The Python_FIND_ABI variable is a 4-tuple specifying, in that
order, pydebug (d), pymalloc (m), unicode (u) and gil_disabled
(t) flags.

Added in version 3.30: A fourth element, specifying the
gil_disabled flag (i.e. free threaded python), is added and is
optional. If not specified, the value is OFF.

Each element can be set to one of the following:

o ON: Corresponding flag is selected.

o OFF: Corresponding flag is not selected.

o ANY: The two possibilities (ON and OFF) will be searched.

NOTE:
If Python3_FIND_ABI is not defined, any ABI, excluding the
gil_disabled flag, will be searched.

From this 4-tuple, various ABIs will be searched starting from
the most specialized to the most general. Moreover, when ANY is
specified for pydebug and gil_disabled, debug and free threaded
versions will be searched after non-debug and non-gil-disabled
ones.

For example, if we have:

set (Python_FIND_ABI "ON" "ANY" "ANY" "ON")

The following flags combinations will be appended, in that
order, to the artifact names: tdmu, tdm, tdu, and td.

And to search any possible ABIs:

set (Python_FIND_ABI "ANY" "ANY" "ANY" "ANY")

The following combinations, in that order, will be used: mu, m,
u, <empty>, dmu, dm, du, d, tmu, tm, tu, t, tdmu, tdm, tdu, and
td.

NOTE:
This hint is useful only on POSIX systems except for the
gil_disabled flag. So, on Windows systems, when
Python_FIND_ABI is defined, Python distributions from
python.org will be found only if the value for each flag is
OFF or ANY except for the fourth one (gil_disabled).

Python_FIND_STRATEGY
Added in version 3.15.

This variable defines how lookup will be done. The
Python_FIND_STRATEGY variable can be set to one of the
following:

o VERSION: Try to find the most recent version in all specified
locations. This is the default if policy CMP0094 is undefined
or set to OLD.

o LOCATION: Stops lookup as soon as a version satisfying version
constraints is founded. This is the default if policy CMP0094
is set to NEW.

DEPRECATED MODULES

   Deprecated Utility Modules
   AddFileDependencies
       Deprecated since version 3.20.


       Add dependencies to a source file.

          add_file_dependencies(<source> <files>...)

       Adds the given <files> to the dependencies of file <source>.

       Do not use this command in new code.  It is just a wrapper around:

          set_property(SOURCE <source> APPEND PROPERTY OBJECT_DEPENDS <files>...)

       Instead use the set_property() command to append to the OBJECT_DEPENDS
       source file property directly.

   CMakeDetermineVSServicePack
       Deprecated since version 3.0: Do not use.


       The functionality of this module has been superseded by the
       CMAKE_<LANG>_COMPILER_VERSION variable that contains the compiler
       version number.

       Determine the Visual Studio service pack of the 'cl' in use.

       Usage:

          if(MSVC)
            include(CMakeDetermineVSServicePack)
            DetermineVSServicePack( my_service_pack )
            if( my_service_pack )
              message(STATUS "Detected: ${my_service_pack}")
            endif()
          endif()

       Function DetermineVSServicePack sets the given variable to one of the
       following values or an empty string if unknown:

          vc80, vc80sp1
          vc90, vc90sp1
          vc100, vc100sp1
          vc110, vc110sp1, vc110sp2, vc110sp3, vc110sp4

   CMakeExpandImportedTargets
       Deprecated since version 3.4: Do not use.


       This module was once needed to expand imported targets to the
       underlying libraries they reference on disk for use with the
       try_compile() and try_run() commands.  These commands now support
       imported libraries in their LINK_LIBRARIES options (since CMake 2.8.11
       for try_compile() and since CMake 3.2 for try_run()).

       This module does not support the policy CMP0022 NEW behavior or use of
       the INTERFACE_LINK_LIBRARIES property because generator expressions
       cannot be evaluated during configuration.

          CMAKE_EXPAND_IMPORTED_TARGETS(<var> LIBRARIES lib1 lib2...libN
                                        [CONFIGURATION <config>])

       CMAKE_EXPAND_IMPORTED_TARGETS() takes a list of libraries and replaces
       all imported targets contained in this list with their actual file
       paths of the referenced libraries on disk, including the libraries from
       their link interfaces.  If a CONFIGURATION is given, it uses the
       respective configuration of the imported targets if it exists.  If no
       CONFIGURATION is given, it uses the first configuration from
       ${CMAKE_CONFIGURATION_TYPES} if set, otherwise ${CMAKE_BUILD_TYPE}.

          cmake_expand_imported_targets(expandedLibs
            LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}
            CONFIGURATION "${CMAKE_TRY_COMPILE_CONFIGURATION}" )

   CMakeFindFrameworks
       Deprecated since version 3.31: This module does nothing, unless policy
       CMP0173 is set to OLD.


       helper module to find OSX frameworks

       This module reads hints about search locations from variables:

          CMAKE_FIND_FRAMEWORK_EXTRA_LOCATIONS - Extra directories

   CMakeForceCompiler
       Deprecated since version 3.6: Do not use.


       The macros provided by this module were once intended for use by
       cross-compiling toolchain files when CMake was not able to
       automatically detect the compiler identification.  Since the
       introduction of this module, CMake's compiler identification
       capabilities have improved and can now be taught to recognize any
       compiler.  Furthermore, the suite of information CMake detects from a
       compiler is now too extensive to be provided by toolchain files using
       these macros.

       One common use case for this module was to skip CMake's checks for a
       working compiler when using a cross-compiler that cannot link binaries
       without special flags or custom linker scripts.  This case is now
       supported by setting the CMAKE_TRY_COMPILE_TARGET_TYPE variable in the
       toolchain file instead.


                                        ----




       Macro CMAKE_FORCE_C_COMPILER has the following signature:

          CMAKE_FORCE_C_COMPILER(<compiler> <compiler-id>)

       It sets CMAKE_C_COMPILER to the given compiler and the cmake internal
       variable CMAKE_C_COMPILER_ID to the given compiler-id.  It also
       bypasses the check for working compiler and basic compiler information
       tests.

       Macro CMAKE_FORCE_CXX_COMPILER has the following signature:

          CMAKE_FORCE_CXX_COMPILER(<compiler> <compiler-id>)

       It sets CMAKE_CXX_COMPILER to the given compiler and the cmake internal
       variable CMAKE_CXX_COMPILER_ID to the given compiler-id.  It also
       bypasses the check for working compiler and basic compiler information
       tests.

       Macro CMAKE_FORCE_Fortran_COMPILER has the following signature:

          CMAKE_FORCE_Fortran_COMPILER(<compiler> <compiler-id>)

       It sets CMAKE_Fortran_COMPILER to the given compiler and the cmake
       internal variable CMAKE_Fortran_COMPILER_ID to the given compiler-id.
       It also bypasses the check for working compiler and basic compiler
       information tests.

       So a simple toolchain file could look like this:

          include (CMakeForceCompiler)
          set(CMAKE_SYSTEM_NAME Generic)
          CMAKE_FORCE_C_COMPILER   (chc12 MetrowerksHicross)
          CMAKE_FORCE_CXX_COMPILER (chc12 MetrowerksHicross)

   CMakeParseArguments
       This module once implemented the cmake_parse_arguments() command that
       is now implemented natively by CMake.  It is now an empty placeholder
       for compatibility with projects that include it to get the command from
       CMake 3.4 and lower.

   Dart
       Deprecated since version 3.27: This module is available only if policy
       CMP0145 is not set to NEW.  Do not use it in new code.  Use the CTest
       module instead.


       Configure a project for testing with CTest or old Dart Tcl Client

       This file is the backwards-compatibility version of the CTest module.
       It supports using the old Dart 1 Tcl client for driving dashboard
       submissions as well as testing with CTest.  This module should be
       included in the CMakeLists.txt file at the top of a project.  Typical
       usage:

          include(Dart)
          if(BUILD_TESTING)
            # ... testing related CMake code ...
          endif()

       The BUILD_TESTING option is created by the Dart module to determine
       whether testing support should be enabled.  The default is ON.

   Documentation
       Deprecated since version 3.18: This module does nothing, unless policy
       CMP0106 is set to OLD.


       This module provides support for the VTK documentation framework.  It
       relies on several tools (Doxygen, Perl, etc).

   GetPrerequisites
       Deprecated since version 3.16: Use file(GET_RUNTIME_DEPENDENCIES)
       instead.


       Functions to analyze and list executable file prerequisites.

       This module provides functions to list the .dll, .dylib or .so files
       that an executable or shared library file depends on.  (Its
       prerequisites.)

       It uses various tools to obtain the list of required shared library
       files:

          dumpbin (Windows)
          objdump (MinGW on Windows)
          ldd (Linux/Unix)
          otool (Mac OSX)

       Changed in version 3.16: The tool specified by CMAKE_OBJDUMP will be
       used, if set.


       The following functions are provided by this module:

          get_prerequisites
          list_prerequisites
          list_prerequisites_by_glob
          gp_append_unique
          is_file_executable
          gp_item_default_embedded_path
            (projects can override with gp_item_default_embedded_path_override)
          gp_resolve_item
            (projects can override with gp_resolve_item_override)
          gp_resolved_file_type
            (projects can override with gp_resolved_file_type_override)
          gp_file_type

          GET_PREREQUISITES(<target> <prerequisites_var> <exclude_system> <recurse>
                            <exepath> <dirs> [<rpaths>])

       Get the list of shared library files required by <target>.  The list in
       the variable named <prerequisites_var> should be empty on first entry
       to this function.  On exit, <prerequisites_var> will contain the list
       of required shared library files.

       <target> is the full path to an executable file.  <prerequisites_var>
       is the name of a CMake variable to contain the results.
       <exclude_system> must be 0 or 1 indicating whether to include or
       exclude "system" prerequisites.  If <recurse> is set to 1 all
       prerequisites will be found recursively, if set to 0 only direct
       prerequisites are listed.  <exepath> is the path to the top level
       executable used for @executable_path replacement on the Mac.  <dirs> is
       a list of paths where libraries might be found: these paths are
       searched first when a target without any path info is given.  Then
       standard system locations are also searched: PATH, Framework locations,
       /usr/lib...

       Added in version 3.14: The variable GET_PREREQUISITES_VERBOSE can be
       set to true to enable verbose output.


          LIST_PREREQUISITES(<target> [<recurse> [<exclude_system> [<verbose>]]])

       Print a message listing the prerequisites of <target>.

       <target> is the name of a shared library or executable target or the
       full path to a shared library or executable file.  If <recurse> is set
       to 1 all prerequisites will be found recursively, if set to 0 only
       direct prerequisites are listed.  <exclude_system> must be 0 or 1
       indicating whether to include or exclude "system" prerequisites.  With
       <verbose> set to 0 only the full path names of the prerequisites are
       printed, set to 1 extra information will be displayed.

          LIST_PREREQUISITES_BY_GLOB(<glob_arg> <glob_exp>)

       Print the prerequisites of shared library and executable files matching
       a globbing pattern.  <glob_arg> is GLOB or GLOB_RECURSE and <glob_exp>
       is a globbing expression used with "file(GLOB" or "file(GLOB_RECURSE"
       to retrieve a list of matching files.  If a matching file is
       executable, its prerequisites are listed.

       Any additional (optional) arguments provided are passed along as the
       optional arguments to the list_prerequisites calls.

          GP_APPEND_UNIQUE(<list_var> <value>)

       Append <value> to the list variable <list_var> only if the value is not
       already in the list.

          IS_FILE_EXECUTABLE(<file> <result_var>)

       Return 1 in <result_var> if <file> is a binary executable, 0 otherwise.

          GP_ITEM_DEFAULT_EMBEDDED_PATH(<item> <default_embedded_path_var>)

       Return the path that others should refer to the item by when the item
       is embedded inside a bundle.

       Override on a per-project basis by providing a project-specific
       gp_item_default_embedded_path_override function.

          GP_RESOLVE_ITEM(<context> <item> <exepath> <dirs> <resolved_item_var>
                          [<rpaths>])

       Resolve an item into an existing full path file.

       Override on a per-project basis by providing a project-specific
       gp_resolve_item_override function.

          GP_RESOLVED_FILE_TYPE(<original_file> <file> <exepath> <dirs> <type_var>
                                [<rpaths>])

       Return the type of <file> with respect to <original_file>.  String
       describing type of prerequisite is returned in variable named
       <type_var>.

       Use <exepath> and <dirs> if necessary to resolve non-absolute <file>
       values -- but only for non-embedded items.

       Possible types are:

          system
          local
          embedded
          other

       Override on a per-project basis by providing a project-specific
       gp_resolved_file_type_override function.

          GP_FILE_TYPE(<original_file> <file> <type_var>)

       Return the type of <file> with respect to <original_file>.  String
       describing type of prerequisite is returned in variable named
       <type_var>.

       Possible types are:

          system
          local
          embedded
          other

   MacroAddFileDependencies
       Deprecated since version 3.14.


          MACRO_ADD_FILE_DEPENDENCIES(<source> <files>...)

       Do not use this command in new code.  It is just a wrapper around:

          set_property(SOURCE <source> APPEND PROPERTY OBJECT_DEPENDS <files>...)

       Instead use the set_property() command to append to the OBJECT_DEPENDS
       source file property directly.

   TestBigEndian
       Deprecated since version 3.20: Supserseded by the
       CMAKE_<LANG>_BYTE_ORDER variable.


       Check if the target architecture is big endian or little endian.

       test_big_endian

                 test_big_endian(<var>)

              Stores in variable <var> either 1 or 0 indicating whether the
              target architecture is big or little endian.

   TestCXXAcceptsFlag
       Deprecated since version 3.0: See CheckCXXCompilerFlag.


       Check if the CXX compiler accepts a flag.

          CHECK_CXX_ACCEPTS_FLAG(<flags> <variable>)

       <flags>
              the flags to try

       <variable>
              variable to store the result

   UseJavaClassFilelist
       Changed in version 3.20: This module was previously documented by
       mistake and was never meant for direct inclusion by project code.  See
       the UseJava module.


   UseJavaSymlinks
       Changed in version 3.20: This module was previously documented by
       mistake and was never meant for direct inclusion by project code.  See
       the UseJava module.


   UsePkgConfig
       Obsolete pkg-config module for CMake, use FindPkgConfig instead.

       This module defines the following macro:

       PKGCONFIG(package includedir libdir linkflags cflags)

       Calling PKGCONFIG will fill the desired information into the 4 given
       arguments, e.g.  PKGCONFIG(libart-2.0 LIBART_INCLUDE_DIR
       LIBART_LINK_DIR LIBART_LINK_FLAGS LIBART_CFLAGS) if pkg-config was NOT
       found or the specified software package doesn't exist, the variable
       will be empty when the function returns, otherwise they will contain
       the respective information

   Use_wxWindows
       Deprecated since version 2.8.10: Use find_package(wxWidgets) and
       include(${wxWidgets_USE_FILE}) instead.


       This convenience include finds if wxWindows is installed and set the
       appropriate libs, incdirs, flags etc.  author Jan Woetzel <jw -at-
       mip.informatik.uni-kiel.de> (07/2003)

       USAGE:

          just include Use_wxWindows.cmake
          in your projects CMakeLists.txt

       include( ${CMAKE_MODULE_PATH}/Use_wxWindows.cmake)

          if you are sure you need GL then

       set(WXWINDOWS_USE_GL 1)

          *before* you include this file.

   WriteBasicConfigVersionFile
       Deprecated since version 3.0: Use the identical command
       write_basic_package_version_file() from module
       CMakePackageConfigHelpers.


          WRITE_BASIC_CONFIG_VERSION_FILE( filename
            [VERSION major.minor.patch]
            COMPATIBILITY (AnyNewerVersion|SameMajorVersion|SameMinorVersion|ExactVersion)
            [ARCH_INDEPENDENT]
            )

   WriteCompilerDetectionHeader
       Deprecated since version 3.20: This module is available only if policy
       CMP0120 is not set to NEW.  Do not use it in new code.


       Added in version 3.1.


       This module provides the function write_compiler_detection_header().

       This function can be used to generate a file suitable for preprocessor
       inclusion which contains macros to be used in source code:

          write_compiler_detection_header(
                    FILE <file>
                    PREFIX <prefix>
                    [OUTPUT_FILES_VAR <output_files_var> OUTPUT_DIR <output_dir>]
                    COMPILERS <compiler> [...]
                    FEATURES <feature> [...]
                    [BARE_FEATURES <feature> [...]]
                    [VERSION <version>]
                    [PROLOG <prolog>]
                    [EPILOG <epilog>]
                    [ALLOW_UNKNOWN_COMPILERS]
                    [ALLOW_UNKNOWN_COMPILER_VERSIONS]
          )

       This generates the file <file> with macros which all have the prefix
       <prefix>.

       By default, all content is written directly to the <file>.  The
       OUTPUT_FILES_VAR may be specified to cause the compiler-specific
       content to be written to separate files.  The separate files are then
       available in the <output_files_var> and may be consumed by the caller
       for installation for example.  The OUTPUT_DIR specifies a relative path
       from the main <file> to the compiler-specific files. For example:

          write_compiler_detection_header(
            FILE climbingstats_compiler_detection.h
            PREFIX ClimbingStats
            OUTPUT_FILES_VAR support_files
            OUTPUT_DIR compilers
            COMPILERS GNU Clang MSVC Intel
            FEATURES cxx_variadic_templates
          )
          install(FILES
            ${CMAKE_CURRENT_BINARY_DIR}/climbingstats_compiler_detection.h
            DESTINATION include
          )
          install(FILES
            ${support_files}
            DESTINATION include/compilers
          )

       VERSION may be used to specify the API version to be generated.  Future
       versions of CMake may introduce alternative APIs.  A given API is
       selected by any <version> value greater than or equal to the version of
       CMake that introduced the given API and less than the version of CMake
       that introduced its succeeding API.  The value of the
       CMAKE_MINIMUM_REQUIRED_VERSION variable is used if no explicit version
       is specified.  (As of CMake version 3.31.2 there is only one API
       version.)

       PROLOG may be specified as text content to write at the start of the
       header. EPILOG may be specified as text content to write at the end of
       the header

       At least one <compiler> and one <feature> must be listed.  Compilers
       which are known to CMake, but not specified are detected and a
       preprocessor #error is generated for them.  A preprocessor macro
       matching <PREFIX>_COMPILER_IS_<compiler> is generated for each compiler
       known to CMake to contain the value 0 or 1.

       Possible compiler identifiers are documented with the
       CMAKE_<LANG>_COMPILER_ID variable.  Available features in this version
       of CMake are listed in the CMAKE_C_KNOWN_FEATURES and
       CMAKE_CXX_KNOWN_FEATURES global properties.  See the
       cmake-compile-features(7) manual for information on compile features.

       Added in version 3.2: Added MSVC and AppleClang compiler support.


       Added in version 3.6: Added Intel compiler support.


       Changed in version 3.8: The {c,cxx}_std_* meta-features are ignored if
       requested.


       Added in version 3.8: ALLOW_UNKNOWN_COMPILERS and
       ALLOW_UNKNOWN_COMPILER_VERSIONS cause the module to generate conditions
       that treat unknown compilers as simply lacking all features.  Without
       these options the default behavior is to generate a #error for unknown
       compilers and versions.


       Added in version 3.12: BARE_FEATURES will define the compatibility
       macros with the name used in newer versions of the language standard,
       so the code can use the new feature name unconditionally.


   Feature Test Macros
       For each compiler, a preprocessor macro is generated matching
       <PREFIX>_COMPILER_IS_<compiler> which has the content either 0 or 1,
       depending on the compiler in use. Preprocessor macros for compiler
       version components are generated matching
       <PREFIX>_COMPILER_VERSION_MAJOR <PREFIX>_COMPILER_VERSION_MINOR and
       <PREFIX>_COMPILER_VERSION_PATCH containing decimal values for the
       corresponding compiler version components, if defined.

       A preprocessor test is generated based on the compiler version denoting
       whether each feature is enabled.  A preprocessor macro matching
       <PREFIX>_COMPILER_<FEATURE>, where <FEATURE> is the upper-case
       <feature> name, is generated to contain the value 0 or 1 depending on
       whether the compiler in use supports the feature:

          write_compiler_detection_header(
            FILE climbingstats_compiler_detection.h
            PREFIX ClimbingStats
            COMPILERS GNU Clang AppleClang MSVC Intel
            FEATURES cxx_variadic_templates
          )

          #if ClimbingStats_COMPILER_CXX_VARIADIC_TEMPLATES
          template<typename... T>
          void someInterface(T t...) { /* ... */ }
          #else
          // Compatibility versions
          template<typename T1>
          void someInterface(T1 t1) { /* ... */ }
          template<typename T1, typename T2>
          void someInterface(T1 t1, T2 t2) { /* ... */ }
          template<typename T1, typename T2, typename T3>
          void someInterface(T1 t1, T2 t2, T3 t3) { /* ... */ }
          #endif

   Symbol Macros
       Some additional symbol-defines are created for particular features for
       use as symbols which may be conditionally defined empty:

          class MyClass ClimbingStats_FINAL
          {
              ClimbingStats_CONSTEXPR int someInterface() { return 42; }
          };

       The ClimbingStats_FINAL macro will expand to final if the compiler (and
       its flags) support the cxx_final feature, and the
       ClimbingStats_CONSTEXPR macro will expand to constexpr if cxx_constexpr
       is supported.

       If BARE_FEATURES cxx_final was given as argument the final keyword will
       be defined for old compilers, too.

       The following features generate corresponding symbol defines and if
       they are available as BARE_FEATURES:

       +----------------------+---------------------------+-------------+------+
       |Feature               | Define                    | Symbol      | bare |
       +----------------------+---------------------------+-------------+------+
       |c_restrict            | <PREFIX>_RESTRICT         | restrict    | yes  |
       +----------------------+---------------------------+-------------+------+
       |cxx_constexpr         | <PREFIX>_CONSTEXPR        | constexpr   | yes  |
       +----------------------+---------------------------+-------------+------+
       |cxx_deleted_functions | <PREFIX>_DELETED_FUNCTION | = delete    |      |
       +----------------------+---------------------------+-------------+------+
       |cxx_extern_templates  | <PREFIX>_EXTERN_TEMPLATE  | extern      |      |
       +----------------------+---------------------------+-------------+------+
       |cxx_final             | <PREFIX>_FINAL            | final       | yes  |
       +----------------------+---------------------------+-------------+------+
       |cxx_noexcept          | <PREFIX>_NOEXCEPT         | noexcept    | yes  |
       +----------------------+---------------------------+-------------+------+
       |cxx_noexcept          | <PREFIX>_NOEXCEPT_EXPR(X) | noexcept(X) |      |
       +----------------------+---------------------------+-------------+------+
       |cxx_override          | <PREFIX>_OVERRIDE         | override    | yes  |
       +----------------------+---------------------------+-------------+------+
   Compatibility Implementation Macros
       Some features are suitable for wrapping in a macro with a backward
       compatibility implementation if the compiler does not support the
       feature.

       When the cxx_static_assert feature is not provided by the compiler, a
       compatibility implementation is available via the
       <PREFIX>_STATIC_ASSERT(COND) and <PREFIX>_STATIC_ASSERT_MSG(COND, MSG)
       function-like macros. The macros expand to static_assert where that
       compiler feature is available, and to a compatibility implementation
       otherwise. In the first form, the condition is stringified in the
       message field of static_assert.  In the second form, the message MSG is
       passed to the message field of static_assert, or ignored if using the
       backward compatibility implementation.

       The cxx_attribute_deprecated feature provides a macro definition
       <PREFIX>_DEPRECATED, which expands to either the standard
       [[deprecated]] attribute or a compiler-specific decorator such as
       __attribute__((__deprecated__)) used by GNU compilers.

       The cxx_alignas feature provides a macro definition <PREFIX>_ALIGNAS
       which expands to either the standard alignas decorator or a
       compiler-specific decorator such as __attribute__ ((__aligned__)) used
       by GNU compilers.

       The cxx_alignof feature provides a macro definition <PREFIX>_ALIGNOF
       which expands to either the standard alignof decorator or a
       compiler-specific decorator such as __alignof__ used by GNU compilers.

   +-------------------------+----------------------------+----------------+------+
   |Feature                  | Define                     | Symbol         | bare |
   +-------------------------+----------------------------+----------------+------+
   |cxx_alignas              | <PREFIX>_ALIGNAS           | alignas        |      |
   +-------------------------+----------------------------+----------------+------+
   |cxx_alignof              | <PREFIX>_ALIGNOF           | alignof        |      |
   +-------------------------+----------------------------+----------------+------+
   |cxx_nullptr              | <PREFIX>_NULLPTR           | nullptr        | yes  |
   +-------------------------+----------------------------+----------------+------+
   |cxx_static_assert        | <PREFIX>_STATIC_ASSERT     | static_assert  |      |
   +-------------------------+----------------------------+----------------+------+
   |cxx_static_assert        | <PREFIX>_STATIC_ASSERT_MSG | static_assert  |      |
   +-------------------------+----------------------------+----------------+------+
   |cxx_attribute_deprecated | <PREFIX>_DEPRECATED        | [[deprecated]] |      |
   +-------------------------+----------------------------+----------------+------+
   |cxx_attribute_deprecated | <PREFIX>_DEPRECATED_MSG    | [[deprecated]] |      |
   +-------------------------+----------------------------+----------------+------+
   |cxx_thread_local         | <PREFIX>_THREAD_LOCAL      | thread_local   |      |
   +-------------------------+----------------------------+----------------+------+
       A use-case which arises with such deprecation macros is the deprecation
       of an entire library.  In that case, all public API in the library may
       be decorated with the <PREFIX>_DEPRECATED macro.  This results in very
       noisy build output when building the library itself, so the macro may
       be may be defined to empty in that case when building the deprecated
       library:

          add_library(compat_support ${srcs})
          target_compile_definitions(compat_support
            PRIVATE
              CompatSupport_DEPRECATED=
          )

   Example Usage
       NOTE:
          This section was migrated from the cmake-compile-features(7) manual
          since it relies on the WriteCompilerDetectionHeader module which is
          removed by policy CMP0120.

       Compile features may be preferred if available, without creating a hard
       requirement.  For example, a library may provide alternative
       implementations depending on whether the cxx_variadic_templates feature
       is available:

          #if Foo_COMPILER_CXX_VARIADIC_TEMPLATES
          template<int I, int... Is>
          struct Interface;

          template<int I>
          struct Interface<I>
          {
            static int accumulate()
            {
              return I;
            }
          };

          template<int I, int... Is>
          struct Interface
          {
            static int accumulate()
            {
              return I + Interface<Is...>::accumulate();
            }
          };
          #else
          template<int I1, int I2 = 0, int I3 = 0, int I4 = 0>
          struct Interface
          {
            static int accumulate() { return I1 + I2 + I3 + I4; }
          };
          #endif

       Such an interface depends on using the correct preprocessor defines for
       the compiler features.  CMake can generate a header file containing
       such defines using the WriteCompilerDetectionHeader module.  The module
       contains the write_compiler_detection_header function which accepts
       parameters to control the content of the generated header file:

          write_compiler_detection_header(
            FILE "${CMAKE_CURRENT_BINARY_DIR}/foo_compiler_detection.h"
            PREFIX Foo
            COMPILERS GNU
            FEATURES
              cxx_variadic_templates
          )

       Such a header file may be used internally in the source code of a
       project, and it may be installed and used in the interface of library
       code.

       For each feature listed in FEATURES, a preprocessor definition is
       created in the header file, and defined to either 1 or 0.

       Additionally, some features call for additional defines, such as the
       cxx_final and cxx_override features. Rather than being used in #ifdef
       code, the final keyword is abstracted by a symbol which is defined to
       either final, a compiler-specific equivalent, or to empty.  That way,
       C++ code can be written to unconditionally use the symbol, and compiler
       support determines what it is expanded to:

          struct Interface {
            virtual void Execute() = 0;
          };

          struct Concrete Foo_FINAL {
            void Execute() Foo_OVERRIDE;
          };

       In this case, Foo_FINAL will expand to final if the compiler supports
       the keyword, or to empty otherwise.

       In this use-case, the project code may wish to enable a particular
       language standard if available from the compiler. The CXX_STANDARD
       target property may be set to the desired language standard for a
       particular target, and the CMAKE_CXX_STANDARD variable may be set to
       influence all following targets:

          write_compiler_detection_header(
            FILE "${CMAKE_CURRENT_BINARY_DIR}/foo_compiler_detection.h"
            PREFIX Foo
            COMPILERS GNU
            FEATURES
              cxx_final cxx_override
          )

          # Includes foo_compiler_detection.h and uses the Foo_FINAL symbol
          # which will expand to 'final' if the compiler supports the requested
          # CXX_STANDARD.
          add_library(foo foo.cpp)
          set_property(TARGET foo PROPERTY CXX_STANDARD 11)

          # Includes foo_compiler_detection.h and uses the Foo_FINAL symbol
          # which will expand to 'final' if the compiler supports the feature,
          # even though CXX_STANDARD is not set explicitly.  The requirement of
          # cxx_constexpr causes CMake to set CXX_STANDARD internally, which
          # affects the compile flags.
          add_library(foo_impl foo_impl.cpp)
          target_compile_features(foo_impl PRIVATE cxx_constexpr)

       The write_compiler_detection_header function also creates compatibility
       code for other features which have standard equivalents.  For example,
       the cxx_static_assert feature is emulated with a template and
       abstracted via the <PREFIX>_STATIC_ASSERT and
       <PREFIX>_STATIC_ASSERT_MSG function-macros.

   Deprecated Find Modules
   FindBoost
       Changed in version 3.30: This module is available only if policy
       CMP0167 is not set to NEW.  Port projects to upstream Boost's
       BoostConfig.cmake package configuration file, for which
       find_package(Boost) now searches.


       Find Boost include dirs and libraries

       Use this module by invoking find_package() with the form:

          find_package(Boost
            [version] [EXACT]      # Minimum or EXACT version e.g. 1.67.0
            [REQUIRED]             # Fail with error if Boost is not found
            [COMPONENTS <libs>...] # Boost libraries by their canonical name
                                   # e.g. "date_time" for "libboost_date_time"
            [OPTIONAL_COMPONENTS <libs>...]
                                   # Optional Boost libraries by their canonical name)
            )                      # e.g. "date_time" for "libboost_date_time"

       This module finds headers and requested component libraries OR a CMake
       package configuration file provided by a "Boost CMake" build.  For the
       latter case skip to the Boost CMake section below.

       Added in version 3.7: bzip2 and zlib components (Windows only).


       Added in version 3.11: The OPTIONAL_COMPONENTS option.


       Added in version 3.13: stacktrace_* components.


       Added in version 3.19: bzip2 and zlib components on all platforms.


   Result Variables
       This module defines the following variables:

       Boost_FOUND
              True if headers and requested libraries were found.

       Boost_INCLUDE_DIRS
              Boost include directories.

       Boost_LIBRARY_DIRS
              Link directories for Boost libraries.

       Boost_LIBRARIES
              Boost component libraries to be linked.

       Boost_<COMPONENT>_FOUND
              True if component <COMPONENT> was found (<COMPONENT> name is
              upper-case).

       Boost_<COMPONENT>_LIBRARY
              Libraries to link for component <COMPONENT> (may include
              target_link_libraries() debug/optimized keywords).

       Boost_VERSION_MACRO
              BOOST_VERSION value from boost/version.hpp.

       Boost_VERSION_STRING
              Boost version number in X.Y.Z format.

       Boost_VERSION
              Boost version number in X.Y.Z format (same as
              Boost_VERSION_STRING).

              Changed in version 3.15: In previous CMake versions, this
              variable used the raw version string from the Boost header (same
              as Boost_VERSION_MACRO).  See policy CMP0093.


       Boost_LIB_VERSION
              Version string appended to library filenames.

       Boost_VERSION_MAJOR, Boost_MAJOR_VERSION
              Boost major version number (X in X.Y.Z).

       Boost_VERSION_MINOR, Boost_MINOR_VERSION
              Boost minor version number (Y in X.Y.Z).

       Boost_VERSION_PATCH, Boost_SUBMINOR_VERSION
              Boost subminor version number (Z in X.Y.Z).

       Boost_VERSION_COUNT
              Amount of version components (3).

       Boost_LIB_DIAGNOSTIC_DEFINITIONS (Windows-specific)
              Pass to add_definitions() to have diagnostic information about
              Boost's automatic linking displayed during compilation

       Added in version 3.15: The Boost_VERSION_<PART> variables.


   Cache variables
       Search results are saved persistently in CMake cache entries:

       Boost_INCLUDE_DIR
              Directory containing Boost headers.

       Boost_LIBRARY_DIR_RELEASE
              Directory containing release Boost libraries.

       Boost_LIBRARY_DIR_DEBUG
              Directory containing debug Boost libraries.

       Boost_<COMPONENT>_LIBRARY_DEBUG
              Component <COMPONENT> library debug variant.

       Boost_<COMPONENT>_LIBRARY_RELEASE
              Component <COMPONENT> library release variant.

       Added in version 3.3: Per-configuration variables
       Boost_LIBRARY_DIR_RELEASE and Boost_LIBRARY_DIR_DEBUG.


   Hints
       This module reads hints about search locations from variables:

       BOOST_ROOT, BOOSTROOT
              Preferred installation prefix.

       BOOST_INCLUDEDIR
              Preferred include directory e.g. <prefix>/include.

       BOOST_LIBRARYDIR
              Preferred library directory e.g. <prefix>/lib.

       Boost_NO_SYSTEM_PATHS
              Set to ON to disable searching in locations not specified by
              these hint variables. Default is OFF.

       Boost_ADDITIONAL_VERSIONS
              List of Boost versions not known to this module.  (Boost install
              locations may contain the version).

       Users may set these hints or results as CACHE entries.  Projects should
       not read these entries directly but instead use the above result
       variables.  Note that some hint names start in upper-case BOOST.  One
       may specify these as environment variables if they are not specified as
       CMake variables or cache entries.

       This module first searches for the Boost header files using the above
       hint variables (excluding BOOST_LIBRARYDIR) and saves the result in
       Boost_INCLUDE_DIR.  Then it searches for requested component libraries
       using the above hints (excluding BOOST_INCLUDEDIR and
       Boost_ADDITIONAL_VERSIONS), "lib" directories near Boost_INCLUDE_DIR,
       and the library name configuration settings below.  It saves the
       library directories in Boost_LIBRARY_DIR_DEBUG and
       Boost_LIBRARY_DIR_RELEASE and individual library locations in
       Boost_<COMPONENT>_LIBRARY_DEBUG and Boost_<COMPONENT>_LIBRARY_RELEASE.
       When one changes settings used by previous searches in the same build
       tree (excluding environment variables) this module discards previous
       search results affected by the changes and searches again.

   Imported Targets
       Added in version 3.5.


       This module defines the following IMPORTED targets:

       Boost::boost
              Target for header-only dependencies. (Boost include directory).

       Boost::headers
              Added in version 3.15: Alias for Boost::boost.


       Boost::<component>
              Target for specific component dependency (shared or static
              library); <component> name is lower-case.

       Boost::diagnostic_definitions
              Interface target to enable diagnostic information about Boost's
              automatic linking during compilation (adds
              -DBOOST_LIB_DIAGNOSTIC).

       Boost::disable_autolinking
              Interface target to disable automatic linking with MSVC (adds
              -DBOOST_ALL_NO_LIB).

       Boost::dynamic_linking
              Interface target to enable dynamic linking with MSVC (adds
              -DBOOST_ALL_DYN_LINK).

       Implicit dependencies such as Boost::filesystem requiring Boost::system
       will be automatically detected and satisfied, even if system is not
       specified when using find_package() and if Boost::system is not added
       to target_link_libraries().  If using Boost::thread, then
       Threads::Threads will also be added automatically.

       It is important to note that the imported targets behave differently
       than variables created by this module: multiple calls to
       find_package(Boost) in the same directory or sub-directories with
       different options (e.g. static or shared) will not override the values
       of the targets created by the first call.

   Other Variables
       Boost libraries come in many variants encoded in their file name.
       Users or projects may tell this module which variant to find by setting
       variables:

       Boost_USE_DEBUG_LIBS
              Added in version 3.10.


              Set to ON or OFF to specify whether to search and use the debug
              libraries.  Default is ON.

       Boost_USE_RELEASE_LIBS
              Added in version 3.10.


              Set to ON or OFF to specify whether to search and use the
              release libraries.  Default is ON.

       Boost_USE_MULTITHREADED
              Set to OFF to use the non-multithreaded libraries ("mt" tag).
              Default is ON.

       Boost_USE_STATIC_LIBS
              Set to ON to force the use of the static libraries.  Default is
              OFF.

       Boost_USE_STATIC_RUNTIME
              Set to ON or OFF to specify whether to use libraries linked
              statically to the C++ runtime ("s" tag).  Default is platform
              dependent.

       Boost_USE_DEBUG_RUNTIME
              Set to ON or OFF to specify whether to use libraries linked to
              the MS debug C++ runtime ("g" tag).  Default is ON.

       Boost_USE_DEBUG_PYTHON
              Set to ON to use libraries compiled with a debug Python build
              ("y" tag).  Default is OFF.

       Boost_USE_STLPORT
              Set to ON to use libraries compiled with STLPort ("p" tag).
              Default is OFF.

       Boost_USE_STLPORT_DEPRECATED_NATIVE_IOSTREAMS
              Set to ON to use libraries compiled with STLPort deprecated
              "native iostreams" ("n" tag).  Default is OFF.

       Boost_COMPILER
              Set to the compiler-specific library suffix (e.g. -gcc43).
              Default is auto-computed for the C++ compiler in use.

              Changed in version 3.9: A list may be used if multiple
              compatible suffixes should be tested for, in decreasing order of
              preference.


       Boost_LIB_PREFIX
              Added in version 3.18.


              Set to the platform-specific library name prefix (e.g. lib) used
              by Boost static libs.  This is needed only on platforms where
              CMake does not know the prefix by default.

       Boost_ARCHITECTURE
              Added in version 3.13.


              Set to the architecture-specific library suffix (e.g. -x64).
              Default is auto-computed for the C++ compiler in use.

       Boost_THREADAPI
              Suffix for thread component library name, such as pthread or
              win32.  Names with and without this suffix will both be tried.

       Boost_NAMESPACE
              Alternate namespace used to build boost with e.g. if set to
              myboost, will search for myboost_thread instead of boost_thread.

       Other variables one may set to control this module are:

       Boost_DEBUG
              Set to ON to enable debug output from FindBoost.  Please enable
              this before filing any bug report.

       Boost_REALPATH
              Set to ON to resolve symlinks for discovered libraries to assist
              with packaging.  For example, the "system" component library may
              be resolved to /usr/lib/libboost_system.so.1.67.0 instead of
              /usr/lib/libboost_system.so.  This does not affect linking and
              should not be enabled unless the user needs this information.

       Boost_LIBRARY_DIR
              Default value for Boost_LIBRARY_DIR_RELEASE and
              Boost_LIBRARY_DIR_DEBUG.

       Boost_NO_WARN_NEW_VERSIONS
              Added in version 3.20.


              Set to ON to suppress the warning about unknown dependencies for
              new Boost versions.

       On Visual Studio and Borland compilers Boost headers request automatic
       linking to corresponding libraries.  This requires matching libraries
       to be linked explicitly or available in the link library search path.
       In this case setting Boost_USE_STATIC_LIBS to OFF may not achieve
       dynamic linking.  Boost automatic linking typically requests static
       libraries with a few exceptions (such as Boost.Python).  Use:

          add_definitions(${Boost_LIB_DIAGNOSTIC_DEFINITIONS})

       to ask Boost to report information about automatic linking requests.

   Examples
       Find Boost headers only:

          find_package(Boost 1.36.0)
          if(Boost_FOUND)
            include_directories(${Boost_INCLUDE_DIRS})
            add_executable(foo foo.cc)
          endif()

       Find Boost libraries and use imported targets:

          find_package(Boost 1.56 REQUIRED COMPONENTS
                       date_time filesystem iostreams)
          add_executable(foo foo.cc)
          target_link_libraries(foo Boost::date_time Boost::filesystem
                                    Boost::iostreams)

       Find Boost Python 3.6 libraries and use imported targets:

          find_package(Boost 1.67 REQUIRED COMPONENTS
                       python36 numpy36)
          add_executable(foo foo.cc)
          target_link_libraries(foo Boost::python36 Boost::numpy36)

       Find Boost headers and some static (release only) libraries:

          set(Boost_USE_STATIC_LIBS        ON)  # only find static libs
          set(Boost_USE_DEBUG_LIBS        OFF)  # ignore debug libs and
          set(Boost_USE_RELEASE_LIBS       ON)  # only find release libs
          set(Boost_USE_MULTITHREADED      ON)
          set(Boost_USE_STATIC_RUNTIME    OFF)
          find_package(Boost 1.66.0 COMPONENTS date_time filesystem system ...)
          if(Boost_FOUND)
            include_directories(${Boost_INCLUDE_DIRS})
            add_executable(foo foo.cc)
            target_link_libraries(foo ${Boost_LIBRARIES})
          endif()

   Boost CMake
       If Boost was built using the boost-cmake project or from Boost 1.70.0
       on it provides a package configuration file for use with find_package's
       config mode.  This module looks for the package configuration file
       called BoostConfig.cmake or boost-config.cmake and stores the result in
       CACHE entry Boost_DIR.  If found, the package configuration file is
       loaded and this module returns with no further action.  See
       documentation of the Boost CMake package configuration for details on
       what it provides.

       Set Boost_NO_BOOST_CMAKE to ON, to disable the search for boost-cmake.

   FindCUDA
       Changed in version 3.27: This module is available only if policy
       CMP0146 is not set to NEW.  Port projects to CMake's first-class CUDA
       language support.


       Deprecated since version 3.10: Do not use this module in new code.


       It is no longer necessary to use this module or call find_package(CUDA)
       for compiling CUDA code. Instead, list CUDA among the languages named
       in the top-level call to the project() command, or call the
       enable_language() command with CUDA.  Then one can add CUDA (.cu)
       sources directly to targets similar to other languages.

       Added in version 3.17: To find and use the CUDA toolkit libraries
       manually, use the FindCUDAToolkit module instead.  It works regardless
       of the CUDA language being enabled.


   Documentation of Deprecated Usage
       Tools for building CUDA C files: libraries and build dependencies.

       This script locates the NVIDIA CUDA C tools.  It should work on Linux,
       Windows, and macOS and should be reasonably up to date with CUDA C
       releases.

       Added in version 3.19: QNX support.


       This script makes use of the standard find_package() arguments of
       <VERSION>, REQUIRED and QUIET.  CUDA_FOUND will report if an acceptable
       version of CUDA was found.

       The script will prompt the user to specify CUDA_TOOLKIT_ROOT_DIR if the
       prefix cannot be determined by the location of nvcc in the system path
       and REQUIRED is specified to find_package().  To use a different
       installed version of the toolkit set the environment variable
       CUDA_BIN_PATH before running cmake (e.g.
       CUDA_BIN_PATH=/usr/local/cuda1.0 instead of the default
       /usr/local/cuda) or set CUDA_TOOLKIT_ROOT_DIR after configuring.  If
       you change the value of CUDA_TOOLKIT_ROOT_DIR, various components that
       depend on the path will be relocated.

       It might be necessary to set CUDA_TOOLKIT_ROOT_DIR manually on certain
       platforms, or to use a CUDA runtime not installed in the default
       location.  In newer versions of the toolkit the CUDA library is
       included with the graphics driver -- be sure that the driver version
       matches what is needed by the CUDA runtime version.

   Input Variables
       The following variables affect the behavior of the macros in the script
       (in alphabetical order).  Note that any of these flags can be changed
       multiple times in the same directory before calling
       cuda_add_executable(), cuda_add_library(), cuda_compile(),
       cuda_compile_ptx(), cuda_compile_fatbin(), cuda_compile_cubin() or
       cuda_wrap_srcs():

       CUDA_64_BIT_DEVICE_CODE (Default: host bit size)
              Set to ON to compile for 64 bit device code, OFF for 32 bit
              device code.  Note that making this different from the host code
              when generating object or C files from CUDA code just won't
              work, because size_t gets defined by nvcc in the generated
              source.  If you compile to PTX and then load the file yourself,
              you can mix bit sizes between device and host.

       CUDA_ATTACH_VS_BUILD_RULE_TO_CUDA_FILE (Default: ON)
              Set to ON if you want the custom build rule to be attached to
              the source file in Visual Studio.  Turn OFF if you add the same
              cuda file to multiple targets.

              This allows the user to build the target from the CUDA file;
              however, bad things can happen if the CUDA source file is added
              to multiple targets.  When performing parallel builds it is
              possible for the custom build command to be run more than once
              and in parallel causing cryptic build errors.  VS runs the rules
              for every source file in the target, and a source can have only
              one rule no matter how many projects it is added to.  When the
              rule is run from multiple targets race conditions can occur on
              the generated file.  Eventually everything will get built, but
              if the user is unaware of this behavior, there may be confusion.
              It would be nice if this script could detect the reuse of source
              files across multiple targets and turn the option off for the
              user, but no good solution could be found.

       CUDA_BUILD_CUBIN (Default: OFF)
              Set to ON to enable and extra compilation pass with the -cubin
              option in Device mode. The output is parsed and register, shared
              memory usage is printed during build.

       CUDA_BUILD_EMULATION (Default: OFF for device mode)
              Set to ON for Emulation mode. -D_DEVICEEMU is defined for CUDA C
              files when CUDA_BUILD_EMULATION is TRUE.

       CUDA_LINK_LIBRARIES_KEYWORD (Default: "")
              Added in version 3.9.


              The <PRIVATE|PUBLIC|INTERFACE> keyword to use for internal
              target_link_libraries() calls. The default is to use no keyword
              which uses the old "plain" form of target_link_libraries(). Note
              that is matters because whatever is used inside the FindCUDA
              module must also be used outside - the two forms of
              target_link_libraries() cannot be mixed.

       CUDA_GENERATED_OUTPUT_DIR (Default: CMAKE_CURRENT_BINARY_DIR)
              Set to the path you wish to have the generated files placed.  If
              it is blank output files will be placed in
              CMAKE_CURRENT_BINARY_DIR.  Intermediate files will always be
              placed in CMAKE_CURRENT_BINARY_DIR/CMakeFiles.

       CUDA_HOST_COMPILATION_CPP (Default: ON)
              Set to OFF for C compilation of host code.

       CUDA_HOST_COMPILER (Default: CMAKE_C_COMPILER)
              Set the host compiler to be used by nvcc.  Ignored if -ccbin or
              --compiler-bindir is already present in the CUDA_NVCC_FLAGS or
              CUDA_NVCC_FLAGS_<CONFIG> variables.  For Visual Studio targets,
              the host compiler is constructed with one or more visual studio
              macros such as $(VCInstallDir), that expands out to the path
              when the command is run from within VS.

              Added in version 3.13: If the CUDAHOSTCXX environment variable
              is set it will be used as the default.


       CUDA_NVCC_FLAGS, CUDA_NVCC_FLAGS_<CONFIG>
              Additional NVCC command line arguments.  NOTE: multiple
              arguments must be semi-colon delimited (e.g.
              --compiler-options;-Wall)

              Added in version 3.6: Contents of these variables may use
              generator expressions.


       CUDA_PROPAGATE_HOST_FLAGS (Default: ON)
              Set to ON to propagate CMAKE_{C,CXX}_FLAGS and their
              configuration dependent counterparts (e.g. CMAKE_C_FLAGS_DEBUG)
              automatically to the host compiler through nvcc's -Xcompiler
              flag.  This helps make the generated host code match the rest of
              the system better.  Sometimes certain flags give nvcc problems,
              and this will help you turn the flag propagation off.  This does
              not affect the flags supplied directly to nvcc via
              CUDA_NVCC_FLAGS or through the OPTION flags specified through
              cuda_add_library(), cuda_add_executable(), or cuda_wrap_srcs().
              Flags used for shared library compilation are not affected by
              this flag.

       CUDA_SEPARABLE_COMPILATION (Default: OFF)
              If set this will enable separable compilation for all CUDA
              runtime object files.  If used outside of cuda_add_executable()
              and cuda_add_library() (e.g. calling cuda_wrap_srcs() directly),
              cuda_compute_separable_compilation_object_file_name() and
              cuda_link_separable_compilation_objects() should be called.

       CUDA_SOURCE_PROPERTY_FORMAT
              Added in version 3.3.


              If this source file property is set, it can override the format
              specified to cuda_wrap_srcs() (OBJ, PTX, CUBIN, or FATBIN).  If
              an input source file is not a .cu file, setting this file will
              cause it to be treated as a .cu file. See documentation for
              set_source_files_properties on how to set this property.

       CUDA_USE_STATIC_CUDA_RUNTIME (Default: ON)
              Added in version 3.3.


              When enabled the static version of the CUDA runtime library will
              be used in CUDA_LIBRARIES.  If the version of CUDA configured
              doesn't support this option, then it will be silently disabled.

       CUDA_VERBOSE_BUILD (Default: OFF)
              Set to ON to see all the commands used when building the CUDA
              file.  When using a Makefile generator the value defaults to
              VERBOSE (run make VERBOSE=1 to see output), although setting
              CUDA_VERBOSE_BUILD to ON will always print the output.

   Commands
       The script creates the following functions and macros (in alphabetical
       order):

          cuda_add_cufft_to_target(<cuda_target>)

       Adds the cufft library to the target (can be any target).  Handles
       whether you are in emulation mode or not.

          cuda_add_cublas_to_target(<cuda_target>)

       Adds the cublas library to the target (can be any target).  Handles
       whether you are in emulation mode or not.

          cuda_add_executable(<cuda_target> <file>...
                              [WIN32] [MACOSX_BUNDLE] [EXCLUDE_FROM_ALL] [OPTIONS ...])

       Creates an executable <cuda_target> which is made up of the files
       specified.  All of the non CUDA C files are compiled using the standard
       build rules specified by CMake and the CUDA files are compiled to
       object files using nvcc and the host compiler.  In addition
       CUDA_INCLUDE_DIRS is added automatically to include_directories().
       Some standard CMake target calls can be used on the target after
       calling this macro (e.g. set_target_properties() and
       target_link_libraries()), but setting properties that adjust
       compilation flags will not affect code compiled by nvcc.  Such flags
       should be modified before calling cuda_add_executable(),
       cuda_add_library() or cuda_wrap_srcs().

          cuda_add_library(<cuda_target> <file>...
                           [STATIC | SHARED | MODULE] [EXCLUDE_FROM_ALL] [OPTIONS ...])

       Same as cuda_add_executable() except that a library is created.

          cuda_build_clean_target()

       Creates a convenience target that deletes all the dependency files
       generated.  You should make clean after running this target to ensure
       the dependency files get regenerated.

          cuda_compile(<generated_files> <file>... [STATIC | SHARED | MODULE]
                       [OPTIONS ...])

       Returns a list of generated files from the input source files to be
       used with add_library() or add_executable().

          cuda_compile_ptx(<generated_files> <file>... [OPTIONS ...])

       Returns a list of PTX files generated from the input source files.

          cuda_compile_fatbin(<generated_files> <file>... [OPTIONS ...])

       Added in version 3.1.


       Returns a list of FATBIN files generated from the input source files.

          cuda_compile_cubin(<generated_files> <file>... [OPTIONS ...])

       Added in version 3.1.


       Returns a list of CUBIN files generated from the input source files.

          cuda_compute_separable_compilation_object_file_name(<output_file_var>
                                                              <cuda_target>
                                                              <object_files>)

       Compute the name of the intermediate link file used for separable
       compilation.  This file name is typically passed into
       CUDA_LINK_SEPARABLE_COMPILATION_OBJECTS.  output_file_var is produced
       based on cuda_target the list of objects files that need separable
       compilation as specified by <object_files>.  If the <object_files> list
       is empty, then <output_file_var> will be empty.  This function is
       called automatically for cuda_add_library() and cuda_add_executable().
       Note that this is a function and not a macro.

          cuda_include_directories(path0 path1 ...)

       Sets the directories that should be passed to nvcc (e.g. nvcc -Ipath0
       -Ipath1 ...). These paths usually contain other .cu files.

          cuda_link_separable_compilation_objects(<output_file_var> <cuda_target>
                                                  <nvcc_flags> <object_files>)

       Generates the link object required by separable compilation from the
       given object files.  This is called automatically for
       cuda_add_executable() and cuda_add_library(), but can be called
       manually when using cuda_wrap_srcs() directly.  When called from
       cuda_add_library() or cuda_add_executable() the <nvcc_flags> passed in
       are the same as the flags passed in via the OPTIONS argument.  The only
       nvcc flag added automatically is the bitness flag as specified by
       CUDA_64_BIT_DEVICE_CODE.  Note that this is a function instead of a
       macro.

          cuda_select_nvcc_arch_flags(<out_variable> [<target_CUDA_architecture> ...])

       Selects GPU arch flags for nvcc based on target_CUDA_architecture.

       Values for target_CUDA_architecture:

       o Auto: detects local machine GPU compute arch at runtime.

       o Common and All: cover common and entire subsets of architectures.

       o <name>: one of Fermi, Kepler, Maxwell, Kepler+Tegra, Kepler+Tesla,
         Maxwell+Tegra, Pascal.

       o <ver>, <ver>(<ver>), <ver>+PTX, where <ver> is one of 2.0, 2.1, 3.0,
         3.2, 3.5, 3.7, 5.0, 5.2, 5.3, 6.0, 6.2.

       Returns list of flags to be added to CUDA_NVCC_FLAGS in <out_variable>.
       Additionally, sets <out_variable>_readable to the resulting numeric
       list.

       Example:

          cuda_select_nvcc_arch_flags(ARCH_FLAGS 3.0 3.5+PTX 5.2(5.0) Maxwell)
          list(APPEND CUDA_NVCC_FLAGS ${ARCH_FLAGS})

       More info on CUDA architectures: https://en.wikipedia.org/wiki/CUDA.
       Note that this is a function instead of a macro.

          cuda_wrap_srcs(<cuda_target> <format> <generated_files> <file>...
                         [STATIC | SHARED | MODULE] [OPTIONS ...])

       This is where all the magic happens.  cuda_add_executable(),
       cuda_add_library(), cuda_compile(), and cuda_compile_ptx() all call
       this function under the hood.

       Given the list of files <file>... this macro generates custom commands
       that generate either PTX or linkable objects (use PTX or OBJ for the
       <format> argument to switch).  Files that don't end with .cu or have
       the HEADER_FILE_ONLY property are ignored.

       The arguments passed in after OPTIONS are extra command line options to
       give to nvcc.  You can also specify per configuration options by
       specifying the name of the configuration followed by the options.
       General options must precede configuration specific options.  Not all
       configurations need to be specified, only the ones provided will be
       used.  For example:

          cuda_add_executable(...
            OPTIONS -DFLAG=2 "-DFLAG_OTHER=space in flag"
            DEBUG -g
            RELEASE --use_fast_math
            RELWITHDEBINFO --use_fast_math;-g
            MINSIZEREL --use_fast_math)

       For certain configurations (namely VS generating object files with
       CUDA_ATTACH_VS_BUILD_RULE_TO_CUDA_FILE set to ON), no generated file
       will be produced for the given cuda file.  This is because when you add
       the cuda file to Visual Studio it knows that this file produces an
       object file and will link in the resulting object file automatically.

       This script will also generate a separate cmake script that is used at
       build time to invoke nvcc.  This is for several reasons:

       o nvcc can return negative numbers as return values which confuses
         Visual Studio into thinking that the command succeeded.  The script
         now checks the error codes and produces errors when there was a
         problem.

       o nvcc has been known to not delete incomplete results when it
         encounters problems.  This confuses build systems into thinking the
         target was generated when in fact an unusable file exists.  The
         script now deletes the output files if there was an error.

       o By putting all the options that affect the build into a file and then
         make the build rule dependent on the file, the output files will be
         regenerated when the options change.

       This script also looks at optional arguments STATIC, SHARED, or MODULE
       to determine when to target the object compilation for a shared
       library.  BUILD_SHARED_LIBS is ignored in cuda_wrap_srcs(), but it is
       respected in cuda_add_library().  On some systems special flags are
       added for building objects intended for shared libraries.  A
       preprocessor macro, <target_name>_EXPORTS is defined when a shared
       library compilation is detected.

       Flags passed into add_definitions with -D or /D are passed along to
       nvcc.

   Result Variables
       The script defines the following variables:

       CUDA_VERSION_MAJOR
              The major version of cuda as reported by nvcc.

       CUDA_VERSION_MINOR
              The minor version.

       CUDA_VERSION, CUDA_VERSION_STRING
              Full version in the X.Y format.

       CUDA_HAS_FP16
              Added in version 3.6: Whether a short float (float16, fp16) is
              supported.


       CUDA_TOOLKIT_ROOT_DIR
              Path to the CUDA Toolkit (defined if not set).

       CUDA_SDK_ROOT_DIR
              Path to the CUDA SDK.  Use this to find files in the SDK.  This
              script will not directly support finding specific libraries or
              headers, as that isn't supported by NVIDIA.  If you want to
              change libraries when the path changes see the FindCUDA.cmake
              script for an example of how to clear these variables.  There
              are also examples of how to use the CUDA_SDK_ROOT_DIR to locate
              headers or libraries, if you so choose (at your own risk).

       CUDA_INCLUDE_DIRS
              Include directory for cuda headers.  Added automatically for
              cuda_add_executable() and cuda_add_library().

       CUDA_LIBRARIES
              Cuda RT library.

       CUDA_CUFFT_LIBRARIES
              Device or emulation library for the Cuda FFT implementation
              (alternative to cuda_add_cufft_to_target() macro)

       CUDA_CUBLAS_LIBRARIES
              Device or emulation library for the Cuda BLAS implementation
              (alternative to cuda_add_cublas_to_target() macro).

       CUDA_cudart_static_LIBRARY
              Statically linkable cuda runtime library.  Only available for
              CUDA version 5.5+.

       CUDA_cudadevrt_LIBRARY
              Added in version 3.7: Device runtime library.  Required for
              separable compilation.


       CUDA_cupti_LIBRARY
              CUDA Profiling Tools Interface library.  Only available for CUDA
              version 4.0+.

       CUDA_curand_LIBRARY
              CUDA Random Number Generation library.  Only available for CUDA
              version 3.2+.

       CUDA_cusolver_LIBRARY
              Added in version 3.2: CUDA Direct Solver library.  Only
              available for CUDA version 7.0+.


       CUDA_cusparse_LIBRARY
              CUDA Sparse Matrix library.  Only available for CUDA version
              3.2+.

       CUDA_npp_LIBRARY
              NVIDIA Performance Primitives lib.  Only available for CUDA
              version 4.0+.

       CUDA_nppc_LIBRARY
              NVIDIA Performance Primitives lib (core).  Only available for
              CUDA version 5.5+.

       CUDA_nppi_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 5.5 - 8.0.

       CUDA_nppial_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 9.0.

       CUDA_nppicc_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 9.0.

       CUDA_nppicom_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 9.0 - 10.2.  Replaced by nvjpeg.

       CUDA_nppidei_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 9.0.

       CUDA_nppif_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 9.0.

       CUDA_nppig_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 9.0.

       CUDA_nppim_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 9.0.

       CUDA_nppist_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 9.0.

       CUDA_nppisu_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 9.0.

       CUDA_nppitc_LIBRARY
              NVIDIA Performance Primitives lib (image processing).  Only
              available for CUDA version 9.0.

       CUDA_npps_LIBRARY
              NVIDIA Performance Primitives lib (signal processing).  Only
              available for CUDA version 5.5+.

       CUDA_nvcuvenc_LIBRARY
              CUDA Video Encoder library.  Only available for CUDA version
              3.2+.  Windows only.

       CUDA_nvcuvid_LIBRARY
              CUDA Video Decoder library.  Only available for CUDA version
              3.2+.  Windows only.

       CUDA_nvToolsExt_LIBRARY
              Added in version 3.16: NVIDA CUDA Tools Extension library.
              Available for CUDA version 5+.


       CUDA_OpenCL_LIBRARY
              Added in version 3.16: NVIDA CUDA OpenCL library.  Available for
              CUDA version 5+.


   FindDart
       Deprecated since version 3.27: This module is available only if policy
       CMP0145 is not set to NEW.


       Find DART

       This module looks for the dart testing software and sets DART_ROOT to
       point to where it found it.

   FindITK
       This module no longer exists.

       This module existed in versions of CMake prior to 3.1, but became only
       a thin wrapper around find_package(ITK NO_MODULE) to provide
       compatibility for projects using long-outdated conventions.  Now
       find_package(ITK) will search for ITKConfig.cmake directly.

   FindPythonInterp
       Changed in version 3.27: This module is available only if policy
       CMP0148 is not set to NEW.


       Deprecated since version 3.12: Use FindPython3, FindPython2 or
       FindPython instead.


       Find python interpreter

       This module finds if Python interpreter is installed and determines
       where the executables are.  This code sets the following variables:

          PYTHONINTERP_FOUND         - Was the Python executable found
          PYTHON_EXECUTABLE          - path to the Python interpreter

          PYTHON_VERSION_STRING      - Python version found e.g. 2.5.2
          PYTHON_VERSION_MAJOR       - Python major version found e.g. 2
          PYTHON_VERSION_MINOR       - Python minor version found e.g. 5
          PYTHON_VERSION_PATCH       - Python patch version found e.g. 2

       The Python_ADDITIONAL_VERSIONS variable can be used to specify a list
       of version numbers that should be taken into account when searching for
       Python.  You need to set this variable before calling
       find_package(PythonInterp).

       If calling both find_package(PythonInterp) and
       find_package(PythonLibs), call find_package(PythonInterp) first to get
       the currently active Python version by default with a consistent
       version of PYTHON_LIBRARIES.

       NOTE:
          A call to find_package(PythonInterp ${V}) for python version V may
          find a python executable with no version suffix.  In this case no
          attempt is made to avoid python executables from other versions.
          Use FindPython3, FindPython2 or FindPython instead.

   FindPythonLibs
       Changed in version 3.27: This module is available only if policy
       CMP0148 is not set to NEW.


       Deprecated since version 3.12: Use FindPython3, FindPython2 or
       FindPython instead.


       Find python libraries

       This module finds if Python is installed and determines where the
       include files and libraries are.  It also determines what the name of
       the library is.  This code sets the following variables:

          PYTHONLIBS_FOUND           - have the Python libs been found
          PYTHON_LIBRARIES           - path to the python library
          PYTHON_INCLUDE_PATH        - path to where Python.h is found (deprecated)
          PYTHON_INCLUDE_DIRS        - path to where Python.h is found
          PYTHON_DEBUG_LIBRARIES     - path to the debug library (deprecated)
          PYTHONLIBS_VERSION_STRING  - version of the Python libs found (since CMake 2.8.8)

       The Python_ADDITIONAL_VERSIONS variable can be used to specify a list
       of version numbers that should be taken into account when searching for
       Python.  You need to set this variable before calling
       find_package(PythonLibs).

       If you'd like to specify the installation of Python to use, you should
       modify the following cache variables:

          PYTHON_LIBRARY             - path to the python library
          PYTHON_INCLUDE_DIR         - path to where Python.h is found

       If calling both find_package(PythonInterp) and
       find_package(PythonLibs), call find_package(PythonInterp) first to get
       the currently active Python version by default with a consistent
       version of PYTHON_LIBRARIES.

   FindQt
       Deprecated since version 3.14: This module is available only if policy
       CMP0084 is not set to NEW.


       Searches for all installed versions of Qt3 or Qt4.

       This module cannot handle Qt5 or any later versions.  For those, see
       cmake-qt(7).

       This module should only be used if your project can work with multiple
       versions of Qt.  If not, you should just directly use FindQt4 or
       FindQt3.  If multiple versions of Qt are found on the machine, then The
       user must set the option DESIRED_QT_VERSION to the version they want to
       use.  If only one version of qt is found on the machine, then the
       DESIRED_QT_VERSION is set to that version and the matching FindQt3 or
       FindQt4 module is included.  Once the user sets DESIRED_QT_VERSION,
       then the FindQt3 or FindQt4 module is included.

          QT_REQUIRED if this is set to TRUE then if CMake can
                      not find Qt4 or Qt3 an error is raised
                      and a message is sent to the user.

          DESIRED_QT_VERSION OPTION is created
          QT4_INSTALLED is set to TRUE if qt4 is found.
          QT3_INSTALLED is set to TRUE if qt3 is found.

   FindUnixCommands
       Deprecated since version 3.26: Use ${CMAKE_COMMAND} -E subcommands
       instead.


       Find Unix commands, including the ones from Cygwin

       This module looks for the Unix commands bash, cp, gzip, mv, rm, and tar
       and stores the result in the variables BASH, CP, GZIP, MV, RM, and TAR.

   FindVTK
       This module no longer exists.

       This module existed in versions of CMake prior to 3.1, but became only
       a thin wrapper around find_package(VTK NO_MODULE) to provide
       compatibility for projects using long-outdated conventions.  Now
       find_package(VTK) will search for VTKConfig.cmake directly.

   FindwxWindows
       Deprecated since version 3.0: Replaced by FindwxWidgets.


       Find wxWindows (wxWidgets) installation

       This module finds if wxWindows/wxWidgets is installed and determines
       where the include files and libraries are.  It also determines what the
       name of the library is.  This code sets the following variables:

          WXWINDOWS_FOUND     = system has WxWindows
          WXWINDOWS_LIBRARIES = path to the wxWindows libraries
                                on Unix/Linux with additional
                                linker flags from
                                "wx-config --libs"
          CMAKE_WXWINDOWS_CXX_FLAGS  = Compiler flags for wxWindows,
                                       essentially "`wx-config --cxxflags`"
                                       on Linux
          WXWINDOWS_INCLUDE_DIR      = where to find "wx/wx.h" and "wx/setup.h"
          WXWINDOWS_LINK_DIRECTORIES = link directories, useful for rpath on
                                        Unix
          WXWINDOWS_DEFINITIONS      = extra defines

       OPTIONS If you need OpenGL support please

          set(WXWINDOWS_USE_GL 1)

       in your CMakeLists.txt before you include this file.

          HAVE_ISYSTEM      - true required to replace -I by -isystem on g++

       For convenience include Use_wxWindows.cmake in your project's
       CMakeLists.txt using
       include(${CMAKE_CURRENT_LIST_DIR}/Use_wxWindows.cmake).

       USAGE

          set(WXWINDOWS_USE_GL 1)
          find_package(wxWindows)

       NOTES wxWidgets 2.6.x is supported for monolithic builds e.g.  compiled
       in wx/build/msw dir as:

          nmake -f makefile.vc BUILD=debug SHARED=0 USE_OPENGL=1 MONOLITHIC=1

       DEPRECATED

          CMAKE_WX_CAN_COMPILE
          WXWINDOWS_LIBRARY
          CMAKE_WX_CXX_FLAGS
          WXWINDOWS_INCLUDE_PATH

       AUTHOR Jan Woetzel (07/2003-01/2006)

   Legacy CPack Modules
       These modules used to be mistakenly exposed to the user, and have been
       moved out of user visibility. They are for CPack internal use, and
       should never be used directly.

   CPackArchive
       Added in version 3.9.


       The documentation for the CPack Archive generator has moved here: CPack
       Archive Generator

   CPackBundle
       The documentation for the CPack Bundle generator has moved here: CPack
       Bundle Generator

   CPackCygwin
       The documentation for the CPack Cygwin generator has moved here: CPack
       Cygwin Generator

   CPackDeb
       The documentation for the CPack DEB generator has moved here: CPack DEB
       Generator

   CPackDMG
       The documentation for the CPack DragNDrop generator has moved here:
       CPack DragNDrop Generator

   CPackFreeBSD
       Added in version 3.10.


       The documentation for the CPack FreeBSD generator has moved here: CPack
       FreeBSD Generator

   CPackNSIS
       The documentation for the CPack NSIS generator has moved here: CPack
       NSIS Generator

   CPackNuGet
       Added in version 3.12.


       The documentation for the CPack NuGet generator has moved here: CPack
       NuGet Generator

   CPackProductBuild
       Added in version 3.7.


       The documentation for the CPack productbuild generator has moved here:
       CPack productbuild Generator

   CPackRPM
       The documentation for the CPack RPM generator has moved here: CPack RPM
       Generator

   CPackWIX
       The documentation for the CPack WIX generator has moved here: CPack WIX
       Generator

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       2000-2024 Kitware, Inc. and Contributors

3.31.2                         December 20, 2024              cmake-modules(7)

cmake 3.31.2 - Generated Sat Dec 21 08:43:17 CST 2024