lib/getopt-pfx-ext.h

   1 /* getopt (GNU extensions) gnulib wrapper header.
   2    Copyright (C) 1989-2017 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    gnulib 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    gnulib 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    <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef _GETOPT_PFX_EXT_H
  22 #define _GETOPT_PFX_EXT_H 1
  23
  24 /* This header should not be used directly; include getopt.h instead.
  25    It does not have a protective #error, because the guard macro for
  26    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_long
  41 # undef getopt_long_only
  42 # undef option
  43 # define getopt_long __GETOPT_ID (getopt_long)
  44 # define getopt_long_only __GETOPT_ID (getopt_long_only)
  45 # define option __GETOPT_ID (option)
  46 #endif
  47
  48 /* Standalone applications get correct prototypes for getopt_long and
  49    getopt_long_only; they declare "char **argv".  For backward
  50    compatibility with old applications, if __GETOPT_PREFIX is not
  51    defined, we supply GNU-libc-compatible, but incorrect, prototypes
  52    using "char *const *argv".  (GNU libc is stuck with the incorrect
  53    prototypes, as they are baked into older versions of LSB.)  */
  54 #ifndef __getopt_argv_const
  55 # if defined __GETOPT_PREFIX
  56 #  define __getopt_argv_const /* empty */
  57 # else
  58 #  define __getopt_argv_const const
  59 # endif
  60 #endif
  61
  62 #include <getopt-ext.h>
  63
  64 #endif /* _GETOPT_PFX_EXT_H */