$NetBSD$

--- Makefile.orig	2016-11-02 14:44:56.000000000 +0000
+++ Makefile
@@ -232,7 +232,7 @@ ifeq (YES,$(DEBUG))
   endif
 
 else
-  CXXFLAGS := -march=native ${CXXFLAGS} -O2
+  CXXFLAGS := ${CXXFLAGS} -O2
 endif