--- makefile~ 2009-11-15 12:11:22.000000000 +0100
+++ makefile 2009-12-05 19:53:57.000000000 +0100
@@ -5,8 +5,8 @@
# This makefile does create and install all documentation.
VERSION = `cat VERSION`
-CFLAGS += -Wall -Wshadow -Wno-char-subscripts -fomit-frame-pointer # gcc specific flags
-CFLAGS += -O -DUNIX -DVERSION=\"$(VERSION)\"
+OPTFLAGS += -O -Wall -Wshadow -Wno-char-subscripts -fomit-frame-pointer # gcc specific flags
+CFLAGS += $(OPTFLAGS) -DUNIX -DVERSION=\"$(VERSION)\"
LDLIBS += -lm # libraries to link
# "make READLINE=1" to include readline support: