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 */