1  /* getopt (basic, portable features) 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_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  /* Work around a a problem on macOS, which declares getopt with a
      52     trailing __DARWIN_ALIAS(getopt) that would expand to something like
      53     __asm("_" "rpl_getopt" "$UNIX2003") were it not for the following
      54     hack to suppress the macOS declaration <https://bugs.gnu.org/40205>.  */
      55  # ifdef __APPLE__
      56  #  define _GETOPT
      57  # endif
      58  
      59  /* The system's getopt.h may have already included getopt-core.h to
      60     declare the unprefixed identifiers.  Undef _GETOPT_CORE_H so that
      61     getopt-core.h declares them with prefixes.  */
      62  # undef _GETOPT_CORE_H
      63  #endif
      64  
      65  #include <getopt-core.h>
      66  
      67  #endif /* _GETOPT_PFX_CORE_H */