lib/getopt-cdefs.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 /* getopt-on-non-glibc compatibility macros.
   4    Copyright (C) 1989-2023 Free Software Foundation, Inc.
   5    This file is part of gnulib.
   6    Unlike most of the getopt implementation, it is NOT shared
   7    with the GNU C Library.
   8
   9    This file is free software: you can redistribute it and/or modify
  10    it under the terms of the GNU Lesser General Public License as
  11    published by the Free Software Foundation; either version 2.1 of the
  12    License, or (at your option) any later version.
  13
  14    This file is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU Lesser General Public License for more details.
  18
  19    You should have received a copy of the GNU Lesser General Public License
  20    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  21
  22 #ifndef _GETOPT_CDEFS_H
  23 #define _GETOPT_CDEFS_H 1
  24
  25 /* This header should not be used directly; include getopt.h or
  26    unistd.h instead.  It does not have a protective #error, because
  27    the guard macro for getopt.h in gnulib is not fixed.  */
  28
  29 /* getopt-core.h and getopt-ext.h are shared with GNU libc, and expect
  30    a number of the internal macros supplied to GNU libc's headers by
  31    sys/cdefs.h.  Provide fallback definitions for all of them.  */
  32 #ifdef HAVE_SYS_CDEFS_H
  33 # include <sys/cdefs.h>
  34 #endif
  35
  36 #ifndef __BEGIN_DECLS
  37 # ifdef __cplusplus
  38 #  define __BEGIN_DECLS extern "C" {
  39 # else
  40 #  define __BEGIN_DECLS /* nothing */
  41 # endif
  42 #endif
  43 #ifndef __END_DECLS
  44 # ifdef __cplusplus
  45 #  define __END_DECLS }
  46 # else
  47 #  define __END_DECLS /* nothing */
  48 # endif
  49 #endif
  50
  51 #ifndef __GNUC_PREREQ
  52 # if defined __GNUC__ && defined __GNUC_VERSION__
  53 # define __GNUC_PREREQ(maj, min) \
  54         ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
  55 # else
  56 #  define __GNUC_PREREQ(maj, min) 0
  57 # endif
  58 #endif
  59
  60 #ifndef __THROW
  61 # if defined __cplusplus && (__GNUC_PREREQ (2,8) || __clang_major__ >= 4)
  62 #  if __cplusplus >= 201103L
  63 #   define __THROW      noexcept (true)
  64 #  else
  65 #   define __THROW      throw ()
  66 #  endif
  67 # else
  68 #  define __THROW
  69 # endif
  70 #endif
  71
  72 #endif /* _GETOPT_CDEFS_H */