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OPENSSL_USER_MACROS(7ossl)          OpenSSL         OPENSSL_USER_MACROS(7ossl)


       openssl_user_macros, OPENSSL_API_COMPAT, OPENSSL_NO_DEPRECATED - User
       defined macros


       User defined macros allow the programmer to control certain aspects of
       what is exposed by the OpenSSL headers.

       NOTE: to be effective, a user defined macro must be defined before
       including any header file that depends on it, either in the compilation
       command ("cc -DMACRO=value") or by defining the macro in source before
       including any headers.

       Other manual pages may refer to this page when declarations depend on
       user defined macros.

   The macros
           The value is a version number, given in one of the following two

               This is the form supported for all versions up to 1.1.x, where
               "M" represents the major number, "NN" represents the minor
               number, and "FF" represents the fix number, as a hexadecimal
               number.  For version 1.1.0, that's "0x10100000L".

               Any version number may be given, but these numbers are the
               current known major deprecation points, making them the most

               "0x00908000L" (version 0.9.8)
               "0x10000000L" (version 1.0.0)
               "0x10100000L" (version 1.1.0)

               For convenience, higher numbers are accepted as well, as long
               as feasible.  For example, "0x60000000L" will work as expected.
               However, it is recommended to start using the second form

               This form is a simple decimal number calculated with this

               major * 10000 + minor * 100 + patch

               where major, minor and patch are the desired major, minor and
               patch components of the version number.  For example:

               30000 corresponds to version 3.0.0
               10002 corresponds to version 1.0.2
               420101 corresponds to version 42.1.1

           If OPENSSL_API_COMPAT is undefined, this default value is used in
           its place: 30300

           If this macro is defined, all deprecated public symbols in all
           OpenSSL versions up to and including the version given by
           OPENSSL_API_COMPAT (or the default value given above, when
           OPENSSL_API_COMPAT isn't defined) will be hidden.


       Copyright 2018-2021 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use
       this file except in compliance with the License.  You can obtain a copy
       in the file LICENSE in the source distribution or at

3.3.0                             2024-05-27        OPENSSL_USER_MACROS(7ossl)

openssl 3.3.0 - Generated Tue May 28 10:31:36 CDT 2024
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