lib/getopt-cdefs.in.h

   1 /* getopt-on-non-glibc compatibility macros.
   2    Copyright (C) 1989-2024 Free Software Foundation, Inc.
   3    This file is part of gnulib.
   4    Unlike most of the getopt implementation, it is NOT shared
   5    with the GNU C Library.
   6
   7    This file is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU Lesser General Public License as
   9    published by the Free Software Foundation; either version 2.1 of the
  10    License, or (at your option) any later version.
  11
  12    This file is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public License
  18    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _GETOPT_CDEFS_H
  21 #define _GETOPT_CDEFS_H 1
  22
  23 /* This header should not be used directly; include getopt.h or
  24    unistd.h instead.  It does not have a protective #error, because
  25    the guard macro for getopt.h in gnulib is not fixed.  */
  26
  27 /* getopt-core.h and getopt-ext.h are shared with GNU libc, and expect
  28    a number of the internal macros supplied to GNU libc's headers by
  29    sys/cdefs.h.  Provide fallback definitions for all of them.  */
  30 #if @HAVE_SYS_CDEFS_H@
  31 # include <sys/cdefs.h>
  32 #endif
  33
  34 #ifndef __BEGIN_DECLS
  35 # ifdef __cplusplus
  36 #  define __BEGIN_DECLS extern "C" {
  37 # else
  38 #  define __BEGIN_DECLS /* nothing */
  39 # endif
  40 #endif
  41 #ifndef __END_DECLS
  42 # ifdef __cplusplus
  43 #  define __END_DECLS }
  44 # else
  45 #  define __END_DECLS /* nothing */
  46 # endif
  47 #endif
  48
  49 #if defined __clang__
  50   /* clang really only groks GNU C 4.2, regardless of its value of __GNUC__.  */
  51 # undef __GNUC_PREREQ
  52 # define __GNUC_PREREQ(maj, min) ((maj) < 4 + ((min) <= 2))
  53 #endif
  54 #ifndef __GNUC_PREREQ
  55 # if defined __GNUC__ && defined __GNUC_MINOR__
  56 #  define __GNUC_PREREQ(maj, min) ((maj) < __GNUC__ + ((min) <= __GNUC_MINOR__))
  57 # else
  58 #  define __GNUC_PREREQ(maj, min) 0
  59 # endif
  60 #endif
  61
  62 #ifndef __THROW
  63 # if defined __cplusplus && (__GNUC_PREREQ (2,8) || __clang_major__ >= 4)
  64 #  if __cplusplus >= 201103L
  65 #   define __THROW      noexcept (true)
  66 #  else
  67 #   define __THROW      throw ()
  68 #  endif
  69 # else
  70 #  define __THROW
  71 # endif
  72 #endif
  73
  74 #endif /* _GETOPT_CDEFS_H */