include/stdc-predef.h

   1 /* Copyright (C) 1991-2022 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    <https://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 #  define __STDC_IEC_60559_BFP__        201404L
  40 # endif
  41 #else
  42 # define __STDC_IEC_559__               1
  43 # define __STDC_IEC_60559_BFP__         201404L
  44 #endif
  45
  46 #ifdef __GCC_IEC_559_COMPLEX
  47 # if __GCC_IEC_559_COMPLEX > 0
  48 #  define __STDC_IEC_559_COMPLEX__      1
  49 #  define __STDC_IEC_60559_COMPLEX__    201404L
  50 # endif
  51 #else
  52 # define __STDC_IEC_559_COMPLEX__       1
  53 # define __STDC_IEC_60559_COMPLEX__     201404L
  54 #endif
  55
  56 /* wchar_t uses Unicode 10.0.0.  Version 10.0 of the Unicode Standard is
  57    synchronized with ISO/IEC 10646:2017, fifth edition, plus
  58    the following additions from Amendment 1 to the fifth edition:
  59    - 56 emoji characters
  60    - 285 hentaigana
  61    - 3 additional Zanabazar Square characters */
  62 #define __STDC_ISO_10646__              201706L
  63
  64 #endif