1  /* getopt (GNU extensions) 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 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_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 */