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