lib/getopt-pfx-core.h

   1 /* getopt (basic, portable features) gnulib wrapper header.
   2    Copyright (C) 1989-2021 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 it
   8    under the terms of the GNU Lesser General Public License as
   9    published by the Free Software Foundation; either version 2.1 of
  10    the License, or (at your option) any later version.
  11
  12    This file is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with gnulib; if not, see
  19    <https://www.gnu.org/licenses/>.  */
  20
  21 #ifndef _GETOPT_PFX_CORE_H
  22 #define _GETOPT_PFX_CORE_H 1
  23
  24 /* This header should not be used directly; include getopt.h or
  25    unistd.h instead.  It does not have a protective #error, because
  26    the guard macro for getopt.h in gnulib is not fixed.  */
  27
  28 /* Standalone applications should #define __GETOPT_PREFIX to an
  29    identifier that prefixes the external functions and variables
  30    defined in getopt-core.h and getopt-ext.h.  Systematically
  31    rename identifiers so that they do not collide with the system
  32    functions and variables.  Renaming avoids problems with some
  33    compilers and linkers.  */
  34 #ifdef __GETOPT_PREFIX
  35 # ifndef __GETOPT_ID
  36 #  define __GETOPT_CONCAT(x, y) x ## y
  37 #  define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
  38 #  define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
  39 # endif
  40 # undef getopt
  41 # undef optarg
  42 # undef opterr
  43 # undef optind
  44 # undef optopt
  45 # define getopt __GETOPT_ID (getopt)
  46 # define optarg __GETOPT_ID (optarg)
  47 # define opterr __GETOPT_ID (opterr)
  48 # define optind __GETOPT_ID (optind)
  49 # define optopt __GETOPT_ID (optopt)
  50
  51 /* Work around a a problem on macOS, which declares getopt with a
  52    trailing __DARWIN_ALIAS(getopt) that would expand to something like
  53    __asm("_" "rpl_getopt" "$UNIX2003") were it not for the following
  54    hack to suppress the macOS declaration <https://bugs.gnu.org/40205>.  */
  55 # ifdef __APPLE__
  56 #  define _GETOPT
  57 # endif
  58
  59 /* The system's getopt.h may have already included getopt-core.h to
  60    declare the unprefixed identifiers.  Undef _GETOPT_CORE_H so that
  61    getopt-core.h declares them with prefixes.  */
  62 # undef _GETOPT_CORE_H
  63 #endif
  64
  65 #include <getopt-core.h>
  66
  67 #endif /* _GETOPT_PFX_CORE_H */