diff -up iometer-2006_07_27.common-src/src/Makefile-Linux.i386.orig iometer-2006_07_27.common-src/src/Makefile-Linux.i386
--- iometer-2006_07_27.common-src/src/Makefile-Linux.i386.orig	2006-08-02 10:30:22.000000000 +0100
+++ iometer-2006_07_27.common-src/src/Makefile-Linux.i386	2011-01-24 14:11:07.570347135 +0000
@@ -107,7 +107,8 @@ STRIP=/usr/bin/strip
 # Some common definitions used.
 # Note 1) -DWORKAROUND_MOD_BUG can be dropped if -O is used in place of -g in CFLAGS
 # Note 2) -D_DETAILS=1 -D_DEBUG enables maximum debug information
-CFLAGS=	-O3 \
+OPTFLAGS = -O3
+CFLAGS=	$(OPTFLAGS) \
 	-Wall \
 	-D_GNU_SOURCE \
 	-DIOMTR_OSFAMILY_UNIX -DIOMTR_OS_LINUX \
diff -up iometer-2006_07_27.common-src/src/Makefile-Linux.x86_64.orig iometer-2006_07_27.common-src/src/Makefile-Linux.x86_64
--- iometer-2006_07_27.common-src/src/Makefile-Linux.x86_64.orig	2006-08-02 10:30:24.000000000 +0100
+++ iometer-2006_07_27.common-src/src/Makefile-Linux.x86_64	2011-01-24 14:09:22.670259330 +0000
@@ -71,7 +71,8 @@ CXX=/usr/bin/g++
 # Note 3) -DIOMTR_SETTING_GCC_M64 allows for the gcc -m64 flag that makes longs
 #         64 bits and pointers 64 bits. This forces changes in data structures
 #         and type definitions for compatibility with a Win32 Iometer.
-CFLAGS=	-O \
+OPTFLAGS = -O
+CFLAGS=	$(OPTFLAGS) \
 	-Wall \
 	-D_GNU_SOURCE \
 	-DIOMTR_OSFAMILY_UNIX -DIOMTR_OS_LINUX \