$OpenBSD: patch-Makefile,v 1.2 2008/11/14 22:09:46 sthen Exp $
--- Makefile.orig	Mon Nov  3 22:06:36 2008
+++ Makefile	Mon Nov  3 22:47:18 2008
@@ -16,11 +16,11 @@ endif
 # Optional flags (CFLAGS, CPPFLAGS, ...)
 
 ifeq ($(DEBUG),1)
-    CFLAGS   := -g
-    CPPFLAGS :=
+    CFLAGS   += -g
+    CPPFLAGS +=
 else
-    CFLAGS   := -O2
-    CPPFLAGS := -DNDEBUG
+    CFLAGS   +=
+    CPPFLAGS += -DNDEBUG
 endif
 
 #------------------------------------------------------------------------------
