lib/getopt-pfx-ext.h

   1 /* getopt (GNU extensions) gnulib wrapper header.
   2    Copyright (C) 1989-2020 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_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 # undef _getopt_internal
  44 # define getopt_long __GETOPT_ID (getopt_long)
  45 # define getopt_long_only __GETOPT_ID (getopt_long_only)
  46 # define option __GETOPT_ID (option)
  47 # define _getopt_internal __GETOPT_ID (getopt_internal)
  48
  49 /* The system's getopt.h may have already included getopt-ext.h to
  50    declare the unprefixed identifiers.  Undef _GETOPT_EXT_H so that
  51    getopt-ext.h declares them with prefixes.  */
  52 # undef _GETOPT_EXT_H
  53 #endif
  54
  55 /* Standalone applications get correct prototypes for getopt_long and
  56    getopt_long_only; they declare "char **argv".  For backward
  57    compatibility with old applications, if __GETOPT_PREFIX is not
  58    defined, we supply GNU-libc-compatible, but incorrect, prototypes
  59    using "char *const *argv".  (GNU libc is stuck with the incorrect
  60    prototypes, as they are baked into older versions of LSB.)  */
  61 #ifndef __getopt_argv_const
  62 # if defined __GETOPT_PREFIX
  63 #  define __getopt_argv_const /* empty */
  64 # else
  65 #  define __getopt_argv_const const
  66 # endif
  67 #endif
  68
  69 #include <getopt-ext.h>
  70
  71 #endif /* _GETOPT_PFX_EXT_H */