mirror of https://gitee.com/openkylin/wget.git
37 lines
1.5 KiB
C
37 lines
1.5 KiB
C
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/* A C macro for declaring that specific function parameters are not used.
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Copyright (C) 2008-2019 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* _GL_UNUSED_PARAMETER is a marker that can be appended to function parameter
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declarations for parameters that are not used. This helps to reduce
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warnings, such as from GCC -Wunused-parameter. The syntax is as follows:
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type param _GL_UNUSED_PARAMETER
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or more generally
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param_decl _GL_UNUSED_PARAMETER
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For example:
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int param _GL_UNUSED_PARAMETER
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int *(*param)(void) _GL_UNUSED_PARAMETER
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Other possible, but obscure and discouraged syntaxes:
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int _GL_UNUSED_PARAMETER *(*param)(void)
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_GL_UNUSED_PARAMETER int *(*param)(void)
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*/
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#ifndef _GL_UNUSED_PARAMETER
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# if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
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# define _GL_UNUSED_PARAMETER __attribute__ ((__unused__))
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# else
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# define _GL_UNUSED_PARAMETER
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# endif
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#endif
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