--- Makefile.orig	2008-12-15 06:55:43.000000000 +0100
+++ Makefile	2008-12-15 15:28:44.033626960 +0100
@@ -6,7 +6,7 @@
 ################
 
 ifneq ($(findstring gcc,$(compiler)),) # GCC family
-  flags = -O3 -fomit-frame-pointer -Ilib
+  flags = $(CXXFLAGS) -Ilib
   c = $(compiler) $(flags)
   cpp = $(subst cc,++,$(compiler)) $(flags)
   obj = o