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

[zfs.git] / config / kernel-elevator-change.m4

diff --git a/config/kernel-elevator-change.m4 b/config/kernel-elevator-change.m4
index 90ab51b..ace5aa8 100644 (file)
--- a/config/kernel-elevator-change.m4
+++ b/config/kernel-elevator-change.m4
@@ -5,7 +5,7 @@ dnl #
 AC_DEFUN([ZFS_AC_KERNEL_ELEVATOR_CHANGE], [
        AC_MSG_CHECKING([whether elevator_change() is available])
        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>
                #include <linux/elevator.h>