--- Makefile.rules.orig	2015-10-05 01:21:32.714369959 -0500
+++ Makefile.rules	2015-10-05 01:21:41.995369959 -0500
@@ -94,7 +94,7 @@
 endif
 
 ifeq ($(findstring BUILD_NATIVE,$(MENUSELECT_CFLAGS)),BUILD_NATIVE)
-    _ASTCFLAGS+=-march=native
+    _ASTCFLAGS+=-mtune=native
 endif
 
 %.o: %.s