$OpenBSD: patch-Makefile,v 1.3 2019/04/02 12:03:27 fcambus Exp $
Index: Makefile
--- Makefile.orig
+++ Makefile
@@ -11,7 +11,7 @@ isrc = interfac
 ifeq ($(DEBUG),Y)
 	OPTS = -g -Wall -pedantic
 else
-	OPTS = -O2 -Wall -pedantic
+	OPTS = $(CXXFLAGS) -Wall -pedantic
 	POST = strip mm$(E)
 endif
 
