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[FreeBSD/FreeBSD.git] / 6 / crypto / heimdal / cf / c-attribute.m4
1 dnl
2 dnl $Id: c-attribute.m4,v 1.2.34.1 2004/04/01 07:27:32 joda Exp $
3 dnl
4
5 dnl
6 dnl Test for __attribute__
7 dnl
8
9 AC_DEFUN([AC_C___ATTRIBUTE__], [
10 AC_MSG_CHECKING(for __attribute__)
11 AC_CACHE_VAL(ac_cv___attribute__, [
12 AC_TRY_COMPILE([
13 #include <stdlib.h>
14 ],
15 [
16 static void foo(void) __attribute__ ((noreturn));
17
18 static void
19 foo(void)
20 {
21   exit(1);
22 }
23 ],
24 ac_cv___attribute__=yes,
25 ac_cv___attribute__=no)])
26 if test "$ac_cv___attribute__" = "yes"; then
27   AC_DEFINE(HAVE___ATTRIBUTE__, 1, [define if your compiler has __attribute__])
28 fi
29 AC_MSG_RESULT($ac_cv___attribute__)
30 ])
31