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authorRichard Maw <richard.maw@codethink.co.uk>2012-01-17 14:43:55 +0000
committerRichard Maw <richard.maw@codethink.co.uk>2012-01-17 14:43:55 +0000
commit2de9abc5c9d40b3c716307d67d16146f823fd554 (patch)
tree6979db67934ddc8b564150b465846a383b428ff8 /gnulib/build-aux/snippet/unused-parameter.h
parent33cc1c6fda6e72a7bae1401e9b2cec495a4d3ff1 (diff)
downloadpatch-baserock/bootstrap.tar.gz
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+/* A C macro for declaring that specific function parameters are not used.
+ Copyright (C) 2008-2011 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* _GL_UNUSED_PARAMETER is a marker that can be appended to function parameter
+ declarations for parameters that are not used. This helps to reduce
+ warnings, such as from GCC -Wunused-parameter. The syntax is as follows:
+ type param _GL_UNUSED_PARAMETER
+ or more generally
+ param_decl _GL_UNUSED_PARAMETER
+ For example:
+ int param _GL_UNUSED_PARAMETER
+ int *(*param)(void) _GL_UNUSED_PARAMETER
+ Other possible, but obscure and discouraged syntaxes:
+ int _GL_UNUSED_PARAMETER *(*param)(void)
+ _GL_UNUSED_PARAMETER int *(*param)(void)
+ */
+#ifndef _GL_UNUSED_PARAMETER
+# if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
+# define _GL_UNUSED_PARAMETER __attribute__ ((__unused__))
+# else
+# define _GL_UNUSED_PARAMETER
+# endif
+#endif