--- makefile.orig	Wed Nov 12 11:47:13 2003
+++ makefile	Mon Nov 17 09:03:21 2003
@@ -20,8 +20,8 @@
 #
 ########################################################################
 
-CC         = cc
-CFLAGS     = -O
+CC         ?= cc
+CFLAGS     ?= -O
 SRC        = ./src
 
 # For MPI, mpicc will set up the proper include and library paths