toolchain/musl/include/features.h

   1 #ifndef _FEATURES_H
   2 #define _FEATURES_H
   3
   4 #if defined(_ALL_SOURCE) && !defined(_GNU_SOURCE)
   5 #define _GNU_SOURCE 1
   6 #endif
   7
   8 #if defined(_DEFAULT_SOURCE) && !defined(_BSD_SOURCE)
   9 #define _BSD_SOURCE 1
  10 #endif
  11
  12 #if !defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) \
  13  && !defined(_XOPEN_SOURCE) && !defined(_GNU_SOURCE) \
  14  && !defined(_BSD_SOURCE) && !defined(__STRICT_ANSI__)
  15 #define _BSD_SOURCE 1
  16 #define _XOPEN_SOURCE 700
  17 #endif
  18
  19 #if __STDC_VERSION__ >= 199901L
  20 #define __restrict restrict
  21 #elif !defined(__GNUC__)
  22 #define __restrict
  23 #endif
  24
  25 #if __STDC_VERSION__ >= 199901L || defined(__cplusplus)
  26 #define __inline inline
  27 #elif !defined(__GNUC__)
  28 #define __inline
  29 #endif
  30
  31 #if __STDC_VERSION__ >= 201112L
  32 #elif defined(__GNUC__)
  33 #define _Noreturn __attribute__((__noreturn__))
  34 #else
  35 #define _Noreturn
  36 #endif
  37
  38 #define __REDIR(x,y) __typeof__(x) x __asm__(#y)
  39
  40 /* Convenience macros to test the versions of glibc and gcc.
  41    Use them like this:
  42    #if __GNUC_PREREQ (2,8)
  43    ... code requiring gcc 2.8 or later ...
  44    #endif
  45    Note - they won't work for gcc1 or glibc1, since the _MINOR macros
  46    were not defined then.  */
  47 #if defined __GNUC__ && defined __GNUC_MINOR__
  48 # define __GNUC_PREREQ(maj, min) \
  49         ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
  50 #else
  51 # define __GNUC_PREREQ(maj, min) 0
  52 #endif
  53
  54 #include <sys/glibc-types.h>
  55
  56 #endif