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61cd9dc9 | 1 | /* A C macro for declaring that specific function parameters are not used. |
af07e104 | 2 | Copyright (C) 2008-2013 Free Software Foundation, Inc. |
61cd9dc9 LC |
3 | |
4 | This program is free software: you can redistribute it and/or modify it | |
5 | under the terms of the GNU General Public License as published | |
6 | by the Free Software Foundation; either version 3 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
49114fd4 | 12 | General Public License for more details. |
61cd9dc9 LC |
13 | |
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
16 | ||
17 | /* _GL_UNUSED_PARAMETER is a marker that can be appended to function parameter | |
18 | declarations for parameters that are not used. This helps to reduce | |
19 | warnings, such as from GCC -Wunused-parameter. The syntax is as follows: | |
20 | type param _GL_UNUSED_PARAMETER | |
21 | or more generally | |
22 | param_decl _GL_UNUSED_PARAMETER | |
23 | For example: | |
24 | int param _GL_UNUSED_PARAMETER | |
25 | int *(*param)(void) _GL_UNUSED_PARAMETER | |
26 | Other possible, but obscure and discouraged syntaxes: | |
27 | int _GL_UNUSED_PARAMETER *(*param)(void) | |
28 | _GL_UNUSED_PARAMETER int *(*param)(void) | |
29 | */ | |
30 | #ifndef _GL_UNUSED_PARAMETER | |
31 | # if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) | |
32 | # define _GL_UNUSED_PARAMETER __attribute__ ((__unused__)) | |
33 | # else | |
34 | # define _GL_UNUSED_PARAMETER | |
35 | # endif | |
36 | #endif |