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| author | Mattias Andrée <maandree@operamail.com> | 2015-10-12 19:55:05 +0200 |
|---|---|---|
| committer | Mattias Andrée <maandree@operamail.com> | 2015-10-12 19:55:05 +0200 |
| commit | a65deacedf177aae64a140eee43c699bcddf79ad (patch) | |
| tree | 9bbaccb6d718c251560e6504fbb7ea1fb677afd8 /include | |
| parent | info: some feature-test macros (diff) | |
| download | slibc-a65deacedf177aae64a140eee43c699bcddf79ad.tar.gz slibc-a65deacedf177aae64a140eee43c699bcddf79ad.tar.bz2 slibc-a65deacedf177aae64a140eee43c699bcddf79ad.tar.xz | |
some feature-test macros
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/slibc/features.h | 63 |
1 files changed, 62 insertions, 1 deletions
diff --git a/include/slibc/features.h b/include/slibc/features.h index e6005f9..d223d76 100644 --- a/include/slibc/features.h +++ b/include/slibc/features.h @@ -40,7 +40,7 @@ /** * Is C99, or newer, used? */ -#if __STDC_VERSION__ >= 199901L +#if __STDC_VERSION__ >= 199901L || defined(_ISOC99_SOURCE) # define __C99__ #endif @@ -54,6 +54,55 @@ /** + * _POSIX_SOURCE is implied if (_POSIX_C_SOURCE >= 1L). + */ +#if !defined(_POSIX_SOURCE) && defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 1L) +# define _POSIX_SOURCE 1 +#endif +#if (!defined(_POSIX_C_SOURCE) || (_POSIX_C_SOURCE <= 0)) && !defined(_POSIX_SOURCE) +# define _POSIX_C_SOURCE 1L +#endif + +/** + * _BSD_SOURCE || _SVID_SOURCE implies _POSIX_C_SOURCE = 2. + */ +#if defined(_BSD_SOURCE) || defined(_SVID_SOURCE) +# if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE < 1L) +# undef _POSIX_C_SOURCE +# endif +# if !defined(_POSIX_C_SOURCE) +# define _POSIX_C_SOURCE 2 +# endif +#endif + +/** + * _SVID_SOURCE implies _XOPEN_SOURCE + */ +#if defined(_SVID_SOURCE) && !defined(_XOPEN_SOURCE) +# define _XOPEN_SOURCE 1 +#endif + +/** + * _BSD_COMPATIBLE_SOURCE requires _BSD_SOURCE. + */ +#if defined(_BSD_COMPATIBLE_SOURCE) && !defined(_BSD_SOURCE) +# if !defined(_SLIBC_SUPPRESS_WARNINGS) +# warning "_BSD_COMPATIBLE_SOURCE is defined, but _BSD_SOURCE is undefined." +# endif +#endif + +/** + * _BSD_COMPATIBLE_SOURCE and _POSIX_COMPATIBLE_SOURCE + * are incompatible. + */ +#if defined(_BSD_COMPATIBLE_SOURCE) && defined(_POSIX_COMPATIBLE_SOURCE) +# if !defined(_SLIBC_SUPPRESS_WARNINGS) +# warning "You should not define both _BSD_COMPATIBLE_SOURCE and _POSIX_COMPATIBLE_SOURCE." +# endif +#endif + + +/** * Feature-test macros that also change that * `_PORTABLE_SOURCE` and `_LIBRARY_HEADER` * is not defined. @@ -142,6 +191,18 @@ /** + * Functions that have a BSD-specification that is conficting + * with the POSIX-specification shall have this attribute. + */ +#if defined(_BSD_SOURCE) && !defined(_POSIX_COMPATIBLE_SOURCE) && !defined(_BSD_COMPATIBLE_SOURCE) +# define __bsd_posix_conflict \ + __warning("The BSD-version of this function is incompatible with the POSIX-version.") +#else +# define __bsd_posix_conflict /* ignore*/ +#endif + + +/** * Format for the `format` GCC function attribute, * for `*printf` functions. */ |