1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
dnl @synopsis AX_C___ATTRIBUTE__
dnl
dnl Provides a test for the compiler support of __attribute__
dnl extensions. defines HAVE___ATTRIBUTE__ if it is found.
dnl
dnl Originating from the 'pork' package by Ryan McCabe <ryan@numb.org>
dnl
dnl @category C
dnl @author Christian Haggstrom <chm@c00.info>
dnl @version 2005-01-21
dnl @license GPLWithACException
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__)
])
|
