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 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 */