2 AC_DEFUN([AC_C___ATTRIBUTE__],
4 AC_MSG_CHECKING(for __attribute__)
5 AC_CACHE_VAL(ac_cv___attribute__, [
6 AC_TRY_COMPILE([#include <stdlib.h>],
7 [int func(int x); int foo(int x __attribute__ ((unused))) { exit(1); }],
8 ac_cv___attribute__=yes, ac_cv___attribute__=no)])
9 if test "$ac_cv___attribute__" = "yes"; then
10 AC_DEFINE(HAVE___ATTRIBUTE__, 1, [Define to 1 if your compiler has __attribute__])
12 AC_MSG_RESULT($ac_cv___attribute__)