Only use gcc -Wunused-but-set-variable when available

[zfs.git] / config / kernel-bdev-block-device-operations.m4

diff --git a/config/kernel-bdev-block-device-operations.m4 b/config/kernel-bdev-block-device-operations.m4
index 2805237..28c3032 100644 (file)
--- a/config/kernel-bdev-block-device-operations.m4
+++ b/config/kernel-bdev-block-device-operations.m4
@@ -4,7 +4,7 @@ dnl #
 AC_DEFUN([ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS], [
        AC_MSG_CHECKING([block device operation prototypes])
        tmp_flags="$EXTRA_KCFLAGS"
-       EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
+       EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
        ZFS_LINUX_TRY_COMPILE([
                #include <linux/blkdev.h>
        ],[