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.

• __CHAR_UNSIGNED__: C Compiler
• __EXTENSIONS__: Posix Variants
• __PROTOTYPES: C Compiler
• _ALL_SOURCE: Posix Variants
• _FILE_OFFSET_BITS: System Services
• _GNU_SOURCE: Posix Variants
• _LARGE_FILES: System Services
• _LARGEFILE_SOURCE: Particular Functions
• _MINIX: Posix Variants
• _POSIX_1_SOURCE: Posix Variants
• _POSIX_PTHREAD_SEMANTICS: Posix Variants
• _POSIX_SOURCE: Posix Variants
• _POSIX_VERSION: Particular Headers
• _TANDEM_SOURCE: Posix Variants
• C_ALLOCA: Particular Functions
• C_GETLOADAVG: Particular Functions
• CLOSEDIR_VOID: Particular Functions
• const: C Compiler
• CXX_NO_MINUS_C_MINUS_O: C++ Compiler
• DGUX: Particular Functions
• DIRENT: Obsolete Macros
• F77_DUMMY_MAIN: Fortran Compiler
• F77_FUNC: Fortran Compiler
• F77_FUNC_: Fortran Compiler
• F77_MAIN: Fortran Compiler
• F77_NO_MINUS_C_MINUS_O: Fortran Compiler
• FC_FUNC: Fortran Compiler
• FC_FUNC_: Fortran Compiler
• FC_MAIN: Fortran Compiler
• FC_NO_MINUS_C_MINUS_O: Fortran Compiler
• FLEXIBLE_ARRAY_MEMBER: C Compiler
• GETGROUPS_T: Particular Types
• GETLODAVG_PRIVILEGED: Particular Functions
• GETPGRP_VOID: Particular Functions
• gid_t: Particular Types
• GWINSZ_IN_SYS_IOCTL: Particular Headers
• HAVE__BOOL: Particular Headers
• HAVE_ALLOCA_H: Particular Functions
• HAVE_C_VARARRAYS: C Compiler
• HAVE_CONFIG_H: Configuration Headers
• HAVE_DECL_STRERROR_R: Particular Functions
• HAVE_DECL_symbol: Generic Declarations
• HAVE_DIRENT_H: Particular Headers
• HAVE_DOPRNT: Particular Functions
• HAVE_function: Generic Functions
• HAVE_GETMNTENT: Particular Functions
• HAVE_header: Generic Headers
• HAVE_INT16_T: Particular Types
• HAVE_INT32_T: Particular Types
• HAVE_INT64_T: Particular Types
• HAVE_INT8_T: Particular Types
• HAVE_INTMAX_T: Particular Types
• HAVE_INTPTR_T: Particular Types
• HAVE_LONG_DOUBLE: Obsolete Macros
• HAVE_LONG_DOUBLE: Particular Types
• HAVE_LONG_DOUBLE_WIDER: Particular Types
• HAVE_LONG_FILE_NAMES: System Services
• HAVE_LONG_LONG_INT: Particular Types
• HAVE_LSTAT_EMPTY_STRING_BUG: Particular Functions
• HAVE_MALLOC: Particular Functions
• HAVE_MBRTOWC: Particular Functions
• HAVE_MMAP: Particular Functions
• HAVE_NDIR_H: Particular Headers
• HAVE_NLIST_H: Particular Functions
• HAVE_OBSTACK: Particular Functions
• HAVE_REALLOC: Particular Functions
• HAVE_RESOLV_H: Particular Headers
• HAVE_RESTARTABLE_SYSCALLS: Obsolete Macros
• HAVE_ST_BLKSIZE: Particular Structures
• HAVE_ST_BLOCKS: Particular Structures
• HAVE_ST_RDEV: Particular Structures
• HAVE_STAT_EMPTY_STRING_BUG: Particular Functions
• HAVE_STDBOOL_H: Particular Headers
• HAVE_STRCOLL: Particular Functions
• HAVE_STRERROR_R: Particular Functions
• HAVE_STRFTIME: Particular Functions
• HAVE_STRINGIZE: C Compiler
• HAVE_STRNLEN: Particular Functions
• HAVE_STRUCT_DIRENT_D_INO: Particular Structures
• HAVE_STRUCT_DIRENT_D_TYPE: Particular Structures
• HAVE_STRUCT_STAT_ST_BLKSIZE: Particular Structures
• HAVE_STRUCT_STAT_ST_BLOCKS: Particular Structures
• HAVE_STRUCT_STAT_ST_RDEV: Particular Structures
• HAVE_SYS_DIR_H: Particular Headers
• HAVE_SYS_NDIR_H: Particular Headers
• HAVE_SYS_WAIT_H: Particular Headers
• HAVE_TM_ZONE: Particular Structures
• HAVE_TYPEOF: C Compiler
• HAVE_TZNAME: Particular Structures
• HAVE_UINT16_T: Particular Types
• HAVE_UINT32_T: Particular Types
• HAVE_UINT64_T: Particular Types
• HAVE_UINT8_T: Particular Types
• HAVE_UINTMAX_T: Particular Types
• HAVE_UINTPTR_T: Particular Types
• HAVE_UNSIGNED_LONG_LONG_INT: Particular Types
• HAVE_UTIME_NULL: Particular Functions
• HAVE_VFORK_H: Particular Functions
• HAVE_VPRINTF: Particular Functions
• HAVE_WAIT3: Obsolete Macros
• HAVE_WORKING_FORK: Particular Functions
• HAVE_WORKING_VFORK: Particular Functions
• inline: C Compiler
• int16_t: Particular Types
• int32_t: Particular Types
• int64_t: Particular Types
• int8_t: Particular Types
• INT_16_BITS: Obsolete Macros
• intmax_t: Particular Types
• intptr_t: Particular Types
• LONG_64_BITS: Obsolete Macros
• LSTAT_FOLLOWS_SLASHED_SYMLINK: Particular Functions
• MAJOR_IN_MKDEV: Particular Headers
• MAJOR_IN_SYSMACROS: Particular Headers
• malloc: Particular Functions
• mbstate_t: Particular Types
• mode_t: Particular Types
• NDEBUG: Particular Headers
• NDIR: Obsolete Macros
• NEED_MEMORY_H: Obsolete Macros
• NEED_SETGID: Particular Functions
• NLIST_NAME_UNION: Particular Functions
• NO_MINUS_C_MINUS_O: C Compiler
• off_t: Particular Types
• PACKAGE_BUGREPORT: Initializing configure
• PACKAGE_NAME: Initializing configure
• PACKAGE_STRING: Initializing configure
• PACKAGE_TARNAME: Initializing configure
• PACKAGE_VERSION: Initializing configure
• PARAMS: C Compiler
• pid_t: Particular Types
• PROTOTYPES: C Compiler
• realloc: Particular Functions
• restrict: C Compiler
• RETSIGTYPE: Particular Types
• SELECT_TYPE_ARG1: Particular Functions
• SELECT_TYPE_ARG234: Particular Functions
• SELECT_TYPE_ARG5: Particular Functions
• SETPGRP_VOID: Particular Functions
• SETVBUF_REVERSED: Particular Functions
• size_t: Particular Types
• ssize_t: Particular Types
• STAT_MACROS_BROKEN: Particular Headers
• STDC_HEADERS: Particular Headers
• STRERROR_R_CHAR_P: Particular Functions
• SVR4: Particular Functions
• SYS_SIGLIST_DECLARED: Obsolete Macros
• SYSDIR: Obsolete Macros
• SYSNDIR: Obsolete Macros
• TIME_WITH_SYS_TIME: Particular Headers
• TM_IN_SYS_TIME: Particular Structures
• typeof: C Compiler
• uid_t: Particular Types
• uint16_t: Particular Types
• uint32_t: Particular Types
• uint64_t: Particular Types
• uint8_t: Particular Types
• uintmax_t: Particular Types
• uintptr_t: Particular Types
• UMAX: Particular Functions
• UMAX4_3: Particular Functions
• USG: Obsolete Macros
• vfork: Particular Functions
• volatile: C Compiler
• WORDS_BIGENDIAN: C Compiler
• X_DISPLAY_MISSING: System Services
• YYTEXT_POINTER: Particular Programs