lib/getopt-pfx-core.h

   1 /* getopt (basic, portable features) gnulib wrapper header.
   2    Copyright (C) 1989-2018 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 General Public License as
   9    published by the Free Software Foundation; either version 3 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    General Public License for more details.
  16
  17    You should have received a copy of the GNU 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 /* The system's getopt.h may have already included getopt-core.h to
  52    declare the unprefixed identifiers.  Undef _GETOPT_CORE_H so that
  53    getopt-core.h declares them with prefixes.  */
  54 # undef _GETOPT_CORE_H
  55 #endif
  56
  57 #include <getopt-core.h>
  58
  59 #endif /* _GETOPT_PFX_CORE_H */