Fix configure tests to play nice with GCC 4.6

[zfs.git] / config / kernel-bdev-logical-size.m4

diff --git a/config/kernel-bdev-logical-size.m4 b/config/kernel-bdev-logical-size.m4
index 1e19966..d066c86 100644 (file)
--- a/config/kernel-bdev-logical-size.m4
+++ b/config/kernel-bdev-logical-size.m4
@@ -7,6 +7,8 @@ dnl # it explicit.
 dnl #
 AC_DEFUN([ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE], [
        AC_MSG_CHECKING([whether bdev_logical_block_size() is available])
+       tmp_flags="$EXTRA_KCFLAGS"
+       EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
        ZFS_LINUX_TRY_COMPILE([
                #include <linux/blkdev.h>
        ],[
@@ -19,4 +21,5 @@ AC_DEFUN([ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE], [
        ],[
                AC_MSG_RESULT(no)
        ])
+       EXTRA_KCFLAGS="$tmp_flags"
 ])