1 /* getopt (basic, portable features) 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 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 /* The system's getopt.h may have already included getopt-core.h to 52 declare the unprefixed identifiers. Undef _GETOPT_CORE_H so that 53 getopt-core.h declares them with prefixes. */ 54 # undef _GETOPT_CORE_H 55 #endif 56 57 #include <getopt-core.h> 58 59 #endif /* _GETOPT_PFX_CORE_H */ 60