gl/getopt-pfx-core.h

   1 /* getopt (basic, portable features) gnulib wrapper header.
   2    Copyright (C) 1989-2023 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_PFX_CORE_H
  21 #define _GETOPT_PFX_CORE_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 /* Standalone applications should #define __GETOPT_PREFIX to an
  28    identifier that prefixes the external functions and variables
  29    defined in getopt-core.h and getopt-ext.h.  Systematically
  30    rename identifiers so that they do not collide with the system
  31    functions and variables.  Renaming avoids problems with some
  32    compilers and linkers.  */
  33 #ifdef __GETOPT_PREFIX
  34 # ifndef __GETOPT_ID
  35 #  define __GETOPT_CONCAT(x, y) x ## y
  36 #  define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
  37 #  define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
  38 # endif
  39 # undef getopt
  40 # undef optarg
  41 # undef opterr
  42 # undef optind
  43 # undef optopt
  44 # define getopt __GETOPT_ID (getopt)
  45 # define optarg __GETOPT_ID (optarg)
  46 # define opterr __GETOPT_ID (opterr)
  47 # define optind __GETOPT_ID (optind)
  48 # define optopt __GETOPT_ID (optopt)
  49
  50 /* Work around a a problem on macOS, which declares getopt with a
  51    trailing __DARWIN_ALIAS(getopt) that would expand to something like
  52    __asm("_" "rpl_getopt" "$UNIX2003") were it not for the following
  53    hack to suppress the macOS declaration <https://bugs.gnu.org/40205>.  */
  54 # ifdef __APPLE__
  55 #  define _GETOPT
  56 # endif
  57
  58 /* The system's getopt.h may have already included getopt-core.h to
  59    declare the unprefixed identifiers.  Undef _GETOPT_CORE_H so that
  60    getopt-core.h declares them with prefixes.  */
  61 # undef _GETOPT_CORE_H
  62 #endif
  63
  64 #include <getopt-core.h>
  65
  66 #endif /* _GETOPT_PFX_CORE_H */