lib/getopt-pfx-core.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 /* getopt (basic, portable features) gnulib wrapper header.
   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_PFX_CORE_H
  23 #define _GETOPT_PFX_CORE_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 /* Standalone applications should #define __GETOPT_PREFIX to an
  30    identifier that prefixes the external functions and variables
  31    defined in getopt-core.h and getopt-ext.h.  Systematically
  32    rename identifiers so that they do not collide with the system
  33    functions and variables.  Renaming avoids problems with some
  34    compilers and linkers.  */
  35 #ifdef __GETOPT_PREFIX
  36 # ifndef __GETOPT_ID
  37 #  define __GETOPT_CONCAT(x, y) x ## y
  38 #  define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
  39 #  define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
  40 # endif
  41 # undef getopt
  42 # undef optarg
  43 # undef opterr
  44 # undef optind
  45 # undef optopt
  46 # define getopt __GETOPT_ID (getopt)
  47 # define optarg __GETOPT_ID (optarg)
  48 # define opterr __GETOPT_ID (opterr)
  49 # define optind __GETOPT_ID (optind)
  50 # define optopt __GETOPT_ID (optopt)
  51
  52 /* Work around a problem on macOS, which declares getopt with a
  53    trailing __DARWIN_ALIAS(getopt) that would expand to something like
  54    __asm("_" "rpl_getopt" "$UNIX2003") were it not for the following
  55    hack to suppress the macOS declaration <https://bugs.gnu.org/40205>.  */
  56 # ifdef __APPLE__
  57 #  define _GETOPT
  58 # endif
  59
  60 /* The system's getopt.h may have already included getopt-core.h to
  61    declare the unprefixed identifiers.  Undef _GETOPT_CORE_H so that
  62    getopt-core.h declares them with prefixes.  */
  63 # undef _GETOPT_CORE_H
  64 #endif
  65
  66 #include <getopt-core.h>
  67
  68 #endif /* _GETOPT_PFX_CORE_H */