--- OS/Makefile-Linux	2004-10-05 10:32:08.000000000 +0200
+++ OS/Makefile-Linux.oden	2004-11-04 00:47:20.702635327 +0100
@@ -7,7 +7,7 @@
 CHOWN_COMMAND=look_for_it
 CHGRP_COMMAND=look_for_it
 
-CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
+CFLAGS ?= -O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
 
 DBMLIB = -ldb
 USE_DB = yes