--- iozone3_347/src/current/makefile.orig	2011-02-07 20:00:02.000000000 -0800
+++ iozone3_347/src/current/makefile	2011-02-07 20:01:03.000000000 -0800
@@ -9,9 +9,9 @@
 #		convex, FreeBSD, OpenBSD, OSFV3, OSFV4, OSFV5, SCO
 #		SCO_Unixware_gcc,NetBSD,TRU64, Mac OS X
 
-CC	= cc
-C89	= c89
-GCC	= gcc
+CC	?= cc
+C89	?= c89
+GCC	?= gcc
 CCS	= /usr/ccs/bin/cc
 NACC	= /opt/ansic/bin/cc
 CFLAGS	=