1 /* A C macro for declaring that specific function parameters are not used.
2    Copyright (C) 2008-2018 Free Software Foundation, Inc.
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
12    General Public License for more details.
13 
14    You should have received a copy of the GNU General Public License
15    along with this program.  If not, see <https://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
37