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dnl
dnl Test for __attribute__ ((unused))
dnl Based on code from the tcpdump version 3.7.2 source.
dnl
AC_DEFUN([AC_C___ATTRIBUTE__], [
AC_MSG_CHECKING(for __attribute__)
AC_CACHE_VAL(ac_cv___attribute__, [
AC_TRY_COMPILE([
#include <stdlib.h>
static void foo (void) __attribute__ ((unused));
static void
foo (void)
{
exit(1);
}
],
[
exit (0);
],
ac_cv___attribute__=yes,
ac_cv___attribute__=no)])
if test "$ac_cv___attribute__" = "yes"; then
AC_DEFINE(UNUSED, __attribute__ ((unused)), [define if your compiler has __attribute__ ((unused))])
else
AC_DEFINE(UNUSED,,)
fi
AC_MSG_RESULT($ac_cv___attribute__)
])
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