--- Makefile.ULTRIX.orig	Sun Nov  8 22:39:28 1998
+++ Makefile.ULTRIX	Mon Sep  6 19:12:20 1999
@@ -10,7 +10,7 @@
 CXX = g++
 
 ## C and C++ compiler flags
-CCFLAGS = -O
+CCFLAGS ?= -O
 CXXFLAGS = -O -ansi -D_G_NO_EXTERN_TEMPLATES
 
 ## System Includes
