Fix configure tests to play nice with GCC 4.6

[zfs.git] / config / kernel-blk-rq-bytes.m4

diff --git a/config/kernel-blk-rq-bytes.m4 b/config/kernel-blk-rq-bytes.m4
index da83405..6430dfe 100644 (file)
--- a/config/kernel-blk-rq-bytes.m4
+++ b/config/kernel-blk-rq-bytes.m4
@@ -6,6 +6,8 @@ dnl blk_rq_bytes() helper was changed to a static inline which we can use.
 dnl #
 AC_DEFUN([ZFS_AC_KERNEL_BLK_RQ_BYTES], [
        AC_MSG_CHECKING([whether blk_rq_bytes() is available])
+       tmp_flags="$EXTRA_KCFLAGS"
+       EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
        ZFS_LINUX_TRY_COMPILE([
                #include <linux/blkdev.h>
        ],[
@@ -35,4 +37,5 @@ AC_DEFUN([ZFS_AC_KERNEL_BLK_RQ_BYTES], [
                AC_DEFINE(HAVE_BLK_RQ_BYTES_GPL_ONLY, 1,
                          [blk_rq_bytes() is GPL-only])
        ])
+       EXTRA_KCFLAGS="$tmp_flags"
 ])