aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/tools/m4/lib/unused-parameter.h
blob: 53474b57542a0fe97c26dfd9147e1b6933da03c6 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
/* _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