1  /* getopt (GNU extensions) gnulib wrapper header.
       2     Copyright (C) 1989-2023 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
       8     it under the terms of the GNU Lesser General Public License as
       9     published by the Free Software Foundation; either version 2.1 of the
      10     License, or (at your option) any later version.
      11  
      12     This file is distributed in the hope that it will be useful,
      13     but WITHOUT ANY WARRANTY; without even the implied warranty of
      14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15     GNU Lesser General Public License for more details.
      16  
      17     You should have received a copy of the GNU Lesser General Public License
      18     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      19  
      20  #ifndef _GETOPT_PFX_EXT_H
      21  #define _GETOPT_PFX_EXT_H 1
      22  
      23  /* This header should not be used directly; include getopt.h instead.
      24     It does not have a protective #error, because the guard macro for
      25     getopt.h in gnulib is not fixed.  */
      26  
      27  /* Standalone applications should #define __GETOPT_PREFIX to an
      28     identifier that prefixes the external functions and variables
      29     defined in getopt-core.h and getopt-ext.h.  Systematically
      30     rename identifiers so that they do not collide with the system
      31     functions and variables.  Renaming avoids problems with some
      32     compilers and linkers.  */
      33  #ifdef __GETOPT_PREFIX
      34  # ifndef __GETOPT_ID
      35  #  define __GETOPT_CONCAT(x, y) x ## y
      36  #  define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
      37  #  define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
      38  # endif
      39  # undef getopt_long
      40  # undef getopt_long_only
      41  # undef option
      42  # undef _getopt_internal
      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  # define _getopt_internal __GETOPT_ID (getopt_internal)
      47  
      48  /* The system's getopt.h may have already included getopt-ext.h to
      49     declare the unprefixed identifiers.  Undef _GETOPT_EXT_H so that
      50     getopt-ext.h declares them with prefixes.  */
      51  # undef _GETOPT_EXT_H
      52  #endif
      53  
      54  /* Standalone applications get correct prototypes for getopt_long and
      55     getopt_long_only; they declare "char **argv".  For backward
      56     compatibility with old applications, if __GETOPT_PREFIX is not
      57     defined, we supply GNU-libc-compatible, but incorrect, prototypes
      58     using "char *const *argv".  (GNU libc is stuck with the incorrect
      59     prototypes, as they are baked into older versions of LSB.)  */
      60  #ifndef __getopt_argv_const
      61  # if defined __GETOPT_PREFIX
      62  #  define __getopt_argv_const /* empty */
      63  # else
      64  #  define __getopt_argv_const const
      65  # endif
      66  #endif
      67  
      68  #include <getopt-ext.h>
      69  
      70  #endif /* _GETOPT_PFX_EXT_H */