include/stdc-predef.h

   1 /* Copyright (C) 1991-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _STDC_PREDEF_H
  19 #define _STDC_PREDEF_H  1
  20
  21 /* This header is separate from features.h so that the compiler can
  22    include it implicitly at the start of every compilation.  It must
  23    not itself include <features.h> or any other header that includes
  24    <features.h> because the implicit include comes before any feature
  25    test macros that may be defined in a source file before it first
  26    explicitly includes a system header.  GCC knows the name of this
  27    header in order to preinclude it.  */
  28
  29 /* glibc's intent is to support the IEC 559 math functionality, real
  30    and complex.  If the GCC (4.9 and later) predefined macros
  31    specifying compiler intent are available, use them to determine
  32    whether the overall intent is to support these features; otherwise,
  33    presume an older compiler has intent to support these features and
  34    define these macros by default.  */
  35
  36 #ifdef __GCC_IEC_559
  37 # if __GCC_IEC_559 > 0
  38 #  define __STDC_IEC_559__              1
  39 # endif
  40 #else
  41 # define __STDC_IEC_559__               1
  42 #endif
  43
  44 #ifdef __GCC_IEC_559_COMPLEX
  45 # if __GCC_IEC_559_COMPLEX > 0
  46 #  define __STDC_IEC_559_COMPLEX__      1
  47 # endif
  48 #else
  49 # define __STDC_IEC_559_COMPLEX__       1
  50 #endif
  51
  52 /* wchar_t uses ISO/IEC 10646 (2nd ed., published 2011-03-15) /
  53    Unicode 6.0.  */
  54 #define __STDC_ISO_10646__              201103L
  55
  56 /* We do not support C11 <threads.h>.  */
  57 #define __STDC_NO_THREADS__             1
  58
  59 #endif