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49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
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#ifndef _FEATURES_H
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#define _FEATURES_H
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#ifdef _ALL_SOURCE
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#define _GNU_SOURCE 1
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#endif
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#if !defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) \
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&& !defined(_XOPEN_SOURCE) && !defined(_GNU_SOURCE) \
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&& !defined(_BSD_SOURCE) && !defined(__STRICT_ANSI__)
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#define _BSD_SOURCE 1
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#define _XOPEN_SOURCE 700
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#endif
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#if __STDC_VERSION__ >= 199901L
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#define __restrict restrict
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#elif !defined(__GNUC__)
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#define __restrict
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#endif
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#if __STDC_VERSION__ >= 199901L || defined(__cplusplus)
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#define __inline inline
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#endif
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#if __STDC_VERSION__ >= 201112L
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#elif defined(__GNUC__)
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#define _Noreturn __attribute__((__noreturn__))
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#else
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#define _Noreturn
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#endif
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/* Convenience macros to test the versions of glibc and gcc.
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Use them like this:
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#if __GNUC_PREREQ (2,8)
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... code requiring gcc 2.8 or later ...
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#endif
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Note - they won't work for gcc1 or glibc1, since the _MINOR macros
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were not defined then. */
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#if defined __GNUC__ && defined __GNUC_MINOR__
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# define __GNUC_PREREQ(maj, min) \
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((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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#else
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# define __GNUC_PREREQ(maj, min) 0
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#endif
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#include <sys/glibc-types.h>
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#endif
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