Christian Haggstrom <chm@c00.info>
GPLWithACException
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cryp.to ac-archive's C Support (released)
Provides a test for the compiler support of __attribute__
extensions. defines HAVE___ATTRIBUTE__ if it is found.
Originating from the 'pork' package by Ryan McCabe <ryan@numb.org>
AC_DEFUN([AX_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);
}],
ac_cv___attribute__=yes,
ac_cv___attribute__=no
)])
if test "$ac_cv___attribute__" = "yes"; then
AC_DEFINE(HAVE___ATTRIBUTE__, 1, [define if your compiler has __attribute__])
fi
AC_MSG_RESULT($ac_cv___attribute__)
])