From: Enlightenment S. <no-...@en...> - 2008-12-31 13:08:49
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Log: Update m4 macro to provide __UNUSED__. Author: cedric Date: 2008-12-31 05:08:45 -0800 (Wed, 31 Dec 2008) New Revision: 38387 Modified: trunk/eet/m4/ac_attribute.m4 Modified: trunk/eet/m4/ac_attribute.m4 =================================================================== --- trunk/eet/m4/ac_attribute.m4 2008-12-31 13:00:36 UTC (rev 38386) +++ trunk/eet/m4/ac_attribute.m4 2008-12-31 13:08:45 UTC (rev 38387) @@ -1,14 +1,46 @@ +dnl Copyright (C) 2004-2008 Kim Woelders +dnl Copyright (C) 2008 Vincent Torri <vtorri at univ-evry dot fr> +dnl That code is public domain and can be freely used or copied. +dnl Originally snatched from somewhere... +dnl Macro for checking if the compiler supports __atribute__ + +dnl Usage: AC_C___ATTRIBUTE__ +dnl call AC_DEFINE for HAVE___ATTRIBUTE__ and __UNUSED__ +dnl if the compiler supports __attribute__, HAVE___ATTRIBUTE__ is +dnl defined to 1 and __UNUSED__ is defined to __attribute__((unused)) +dnl otherwise, HAVE___ATTRIBUTE__ is not defined and __UNUSED__ is +dnl defined to nothing. + AC_DEFUN([AC_C___ATTRIBUTE__], [ - AC_MSG_CHECKING(for __attribute__) - AC_CACHE_VAL(ac_cv___attribute__, [ - AC_TRY_COMPILE([#include <stdlib.h>], - [int func(int x); int foo(int x __attribute__ ((unused))) { exit(1); }], - ac_cv___attribute__=yes, ac_cv___attribute__=no)]) - if test "$ac_cv___attribute__" = "yes"; then - AC_DEFINE(HAVE___ATTRIBUTE__, 1, [Define to 1 if your compiler has __attribute__]) - fi - AC_MSG_RESULT($ac_cv___attribute__) + +AC_MSG_CHECKING([for __attribute__]) + +AC_CACHE_VAL([ac_cv___attribute__], + [AC_TRY_COMPILE( + [ +#include <stdlib.h> + ], + [ +int func(int x); +int foo(int x __attribute__ ((unused))) +{ + exit(1); +} + ], + [ac_cv___attribute__="yes"], + [ac_cv___attribute__="no"] + )] +) + +AC_MSG_RESULT($ac_cv___attribute__) + +if test "x${ac_cv___attribute__}" = "xyes" ; then + AC_DEFINE([HAVE___ATTRIBUTE__], [1], [Define to 1 if your compiler has __attribute__]) + AC_DEFINE([__UNUSED__], [__attribute__((unused))], [Macro declaring a function argument to be unused]) + else + AC_DEFINE([__UNUSED__], [], [Macro declaring a function argument to be unused]) +fi + ]) - |