toolchain/musl/include/features.h

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