Predefined macros [Gnu compiler]

__GNUC__

__GNUC_MINOR__

__GNUC_PATCHLEVEL__

__GNUG__

__STRICT_ANSI__

__BASE_FILE__

__INCLUDE_LEVEL__

__ELF__

__VERSION__

__OPTIMIZE__

__OPTIMIZE_SIZE__

__NO_INLINE__

__CHAR_UNSIGNED__

__WCHAR_UNSIGNED__

__REGISTER_PREFIX__

__USER_LABEL_PREFIX__

__SIZE_TYPE__

__PTRDIFF_TYPE__

__WCHAR_TYPE__

__WINT_TYPE__

__CHAR_BIT__

__SCHAR_MAX__

__SHRT_MAX__

__INT_MAX__

__LONG_MAX__

__LONG_LONG_MAX__

__USING_SJLJ_EXCEPTIONS__

__NEXT_RUNTIME__

__LP64__

_LP64