--- Makefile.orig	2013-08-17 10:13:57.000000000 +0800
+++ Makefile	2013-08-17 10:14:10.000000000 +0800
@@ -1,5 +1,5 @@
-CC=gcc
-CFLAGS=-I. -std=c99 -Wall -W -Wundef -Wno-implicit-function-declaration
+CC:=$(CC)
+CFLAGS:=-I. -std=c99 -Wall -W -Wundef -Wno-implicit-function-declaration
 
 OS := $(shell uname)
 ifeq ($(OS),Linux)