--- Makefile.orig	2011-09-06 11:10:37.000000000 +0800
+++ Makefile	2011-09-06 11:10:42.000000000 +0800
@@ -1,7 +1,7 @@
 # Where cgichk goes when user decides to install
 INSTALLDIR=/usr/local/bin
 
-CC      = gcc
+CC      ?= gcc
 OPTIONS = $(WINCRAP)
 CFLAGS  = -O2 -s $(OPTIONS)
 OUTPUT  = cgichk