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B.3 Preprocessor Symbol Index

This is an alphabetical list of the C preprocessor symbols that the Autoconf macros define. To work with Autoconf, C source code needs to use these names in #if or #ifdef directives.

Jump to:	_ A C D F G H I L M N O P R S T U V W X Y

	Index Entry	Section

_
	`__CHAR_UNSIGNED__`	5.10.3 C Compiler Characteristics
	`__EXTENSIONS__`	5.12 Posix Variants
	`__PROTOTYPES`	5.10.3 C Compiler Characteristics
	`_ALL_SOURCE`	5.12 Posix Variants
	`_ALL_SOURCE`	18.4 Obsolete Macros
	`_FILE_OFFSET_BITS`	5.11 System Services
	`_GNU_SOURCE`	5.12 Posix Variants
	`_GNU_SOURCE`	18.4 Obsolete Macros
	`_LARGE_FILES`	5.11 System Services
	`_LARGEFILE_SOURCE`	5.5.2 Particular Function Checks
	`_MINIX`	5.12 Posix Variants
	`_MINIX`	18.4 Obsolete Macros
	`_OPENMP`	5.10.2 Generic Compiler Characteristics
	`_POSIX_1_SOURCE`	5.12 Posix Variants
	`_POSIX_1_SOURCE`	18.4 Obsolete Macros
	`_POSIX_PTHREAD_SEMANTICS`	5.12 Posix Variants
	`_POSIX_SOURCE`	5.12 Posix Variants
	`_POSIX_SOURCE`	18.4 Obsolete Macros
	`_POSIX_VERSION`	5.6.2 Particular Header Checks
	`_TANDEM_SOURCE`	5.12 Posix Variants

A
	`ALIGNOF_type`	5.10.2 Generic Compiler Characteristics

C
	`C_ALLOCA`	5.5.2 Particular Function Checks
	`C_GETLOADAVG`	5.5.2 Particular Function Checks
	`CLOSEDIR_VOID`	5.5.2 Particular Function Checks
	`const`	5.10.3 C Compiler Characteristics
	`CXX_NO_MINUS_C_MINUS_O`	5.10.4 C++ Compiler Characteristics

D
	`DGUX`	5.5.2 Particular Function Checks
	`DIRENT`	18.4 Obsolete Macros

F
	`F77_DUMMY_MAIN`	5.10.7 Fortran Compiler Characteristics
	`F77_FUNC`	5.10.7 Fortran Compiler Characteristics
	`F77_FUNC_`	5.10.7 Fortran Compiler Characteristics
	`F77_MAIN`	5.10.7 Fortran Compiler Characteristics
	`F77_NO_MINUS_C_MINUS_O`	5.10.7 Fortran Compiler Characteristics
	`FC_FUNC`	5.10.7 Fortran Compiler Characteristics
	`FC_FUNC_`	5.10.7 Fortran Compiler Characteristics
	`FC_MAIN`	5.10.7 Fortran Compiler Characteristics
	`FC_NO_MINUS_C_MINUS_O`	5.10.7 Fortran Compiler Characteristics
	`FLEXIBLE_ARRAY_MEMBER`	5.10.3 C Compiler Characteristics

G
	`GETGROUPS_T`	5.9.1 Particular Type Checks
	`GETLOADAVG_PRIVILEGED`	5.5.2 Particular Function Checks
	`GETPGRP_VOID`	5.5.2 Particular Function Checks
	`gid_t`	5.9.1 Particular Type Checks
	`GWINSZ_IN_SYS_IOCTL`	5.6.2 Particular Header Checks

H
	`HAVE__BOOL`	5.6.2 Particular Header Checks
	`HAVE_aggregate_member`	5.8.2 Generic Structure Checks
	`HAVE_ALLOCA_H`	5.5.2 Particular Function Checks
	`HAVE_C_BACKSLASH_A`	5.10.3 C Compiler Characteristics
	`HAVE_C_VARARRAYS`	5.10.3 C Compiler Characteristics
	`HAVE_CHOWN`	5.5.2 Particular Function Checks
	`HAVE_CONFIG_H`	4.9 Configuration Header Files
	`HAVE_DECL_STRERROR_R`	5.5.2 Particular Function Checks
	`HAVE_DECL_symbol`	5.7.2 Generic Declaration Checks
	`HAVE_DECL_symbol`	5.7.2 Generic Declaration Checks
	`HAVE_DECL_TZNAME`	5.8.1 Particular Structure Checks
	`HAVE_DIRENT_H`	5.6.2 Particular Header Checks
	`HAVE_DOPRNT`	5.5.2 Particular Function Checks
	`HAVE_FSEEKO`	5.5.2 Particular Function Checks
	`HAVE_function`	5.5.3 Generic Function Checks
	`HAVE_function`	5.5.3 Generic Function Checks
	`HAVE_function`	5.5.3 Generic Function Checks
	`HAVE_GETGROUPS`	5.5.2 Particular Function Checks
	`HAVE_GETMNTENT`	5.5.2 Particular Function Checks
	`HAVE_header`	5.6.3 Generic Header Checks
	`HAVE_header`	5.6.3 Generic Header Checks
	`HAVE_INT16_T`	5.9.1 Particular Type Checks
	`HAVE_INT32_T`	5.9.1 Particular Type Checks
	`HAVE_INT64_T`	5.9.1 Particular Type Checks
	`HAVE_INT8_T`	5.9.1 Particular Type Checks
	`HAVE_INTMAX_T`	5.9.1 Particular Type Checks
	`HAVE_INTPTR_T`	5.9.1 Particular Type Checks
	`HAVE_LONG_DOUBLE`	5.9.1 Particular Type Checks
	`HAVE_LONG_DOUBLE`	18.4 Obsolete Macros
	`HAVE_LONG_DOUBLE_WIDER`	5.9.1 Particular Type Checks
	`HAVE_LONG_FILE_NAMES`	5.11 System Services
	`HAVE_LONG_LONG_INT`	5.9.1 Particular Type Checks
	`HAVE_LSTAT_EMPTY_STRING_BUG`	5.5.2 Particular Function Checks
	`HAVE_MALLOC`	5.5.2 Particular Function Checks
	`HAVE_MBRTOWC`	5.5.2 Particular Function Checks
	`HAVE_MMAP`	5.5.2 Particular Function Checks
	`HAVE_NDIR_H`	5.6.2 Particular Header Checks
	`HAVE_NLIST_H`	5.5.2 Particular Function Checks
	`HAVE_OBSTACK`	5.5.2 Particular Function Checks
	`HAVE_REALLOC`	5.5.2 Particular Function Checks
	`HAVE_RESOLV_H`	5.6.2 Particular Header Checks
	`HAVE_RESTARTABLE_SYSCALLS`	18.4 Obsolete Macros
	`HAVE_ST_BLKSIZE`	18.4 Obsolete Macros
	`HAVE_ST_BLOCKS`	5.8.1 Particular Structure Checks
	`HAVE_ST_RDEV`	18.4 Obsolete Macros
	`HAVE_STAT_EMPTY_STRING_BUG`	5.5.2 Particular Function Checks
	`HAVE_STDBOOL_H`	5.6.2 Particular Header Checks
	`HAVE_STRCOLL`	5.5.2 Particular Function Checks
	`HAVE_STRERROR_R`	5.5.2 Particular Function Checks
	`HAVE_STRFTIME`	5.5.2 Particular Function Checks
	`HAVE_STRINGIZE`	5.10.3 C Compiler Characteristics
	`HAVE_STRNLEN`	5.5.2 Particular Function Checks
	`HAVE_STRTOLD`	5.5.2 Particular Function Checks
	`HAVE_STRUCT_DIRENT_D_INO`	5.8.1 Particular Structure Checks
	`HAVE_STRUCT_DIRENT_D_TYPE`	5.8.1 Particular Structure Checks
	`HAVE_STRUCT_STAT_ST_BLKSIZE`	18.4 Obsolete Macros
	`HAVE_STRUCT_STAT_ST_BLOCKS`	5.8.1 Particular Structure Checks
	`HAVE_STRUCT_STAT_ST_RDEV`	18.4 Obsolete Macros
	`HAVE_STRUCT_TM_TM_ZONE`	5.8.1 Particular Structure Checks
	`HAVE_SYS_DIR_H`	5.6.2 Particular Header Checks
	`HAVE_SYS_NDIR_H`	5.6.2 Particular Header Checks
	`HAVE_SYS_WAIT_H`	5.6.2 Particular Header Checks
	`HAVE_TM_ZONE`	5.8.1 Particular Structure Checks
	`HAVE_type`	5.9.2 Generic Type Checks
	`HAVE_TYPEOF`	5.10.3 C Compiler Characteristics
	`HAVE_TZNAME`	5.8.1 Particular Structure Checks
	`HAVE_UINT16_T`	5.9.1 Particular Type Checks
	`HAVE_UINT32_T`	5.9.1 Particular Type Checks
	`HAVE_UINT64_T`	5.9.1 Particular Type Checks
	`HAVE_UINT8_T`	5.9.1 Particular Type Checks
	`HAVE_UINTMAX_T`	5.9.1 Particular Type Checks
	`HAVE_UINTPTR_T`	5.9.1 Particular Type Checks
	`HAVE_UNSIGNED_LONG_LONG_INT`	5.9.1 Particular Type Checks
	`HAVE_UTIME_NULL`	5.5.2 Particular Function Checks
	`HAVE_VFORK_H`	5.5.2 Particular Function Checks
	`HAVE_VPRINTF`	5.5.2 Particular Function Checks
	`HAVE_WAIT3`	18.4 Obsolete Macros
	`HAVE_WORKING_FORK`	5.5.2 Particular Function Checks
	`HAVE_WORKING_VFORK`	5.5.2 Particular Function Checks

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