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xfs_io: fix test for fallocate on 32bit boxes

To: xfs-oss <xfs@xxxxxxxxxxx>
Subject: xfs_io: fix test for fallocate on 32bit boxes
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Mon, 15 Jun 2009 14:43:04 -0500
User-agent: Thunderbird 2.0.0.21 (Macintosh/20090302)
xfs_io: fix test for fallocate on 32bit boxes

As per Red Hat bug 500487, fallocate64 is missing in glibc,
so attempts to build with fallocate and _FILE_OFFSET_BITS=64
will fail.

So, change the config to test the way we will build, and
it'll fail properly on x86 until glibc gets fixed.

Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxxx>
---

diff --git a/m4/package_libcdev.m4 b/m4/package_libcdev.m4
index 1ac4666..1c1859d 100644
--- a/m4/package_libcdev.m4
+++ b/m4/package_libcdev.m4
@@ -105,6 +105,9 @@ AC_DEFUN([AC_HAVE_GETMNTINFO],
 AC_DEFUN([AC_HAVE_FALLOCATE],
   [ AC_MSG_CHECKING([for fallocate])
     AC_TRY_LINK([
+#define _GNU_SOURCE
+#define _FILE_OFFSET_BITS 64
+#include <fcntl.h>
 #include <linux/falloc.h>
     ], [
          fallocate(0, 0, 0, 0);


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