--- src/Makefile.FreeBSD-i386.orig	2008-04-06 14:24:46.000000000 +0800
+++ src/Makefile.FreeBSD-i386	2008-04-06 14:25:19.000000000 +0800
@@ -4,11 +4,11 @@
 #
 
 # name of the compiler for C and C++ language
-CC=gcc
-CXX=g++
+CC?=gcc
+CXX?=g++
 
 # C++ compiler flags
-CXXFLAGS = -Wall -std=c++98 -fPIC
+CXXFLAGS ?= -Wall -std=c++98 -fPIC
 CXXFLAGS += -O2  # with optimization
 CXXFLAGS += -g   # with debug info
 #CXXFLAGS += -pg # with profile support