--- SeqLib/fermi-lite/Makefile.orig	2018-03-23 18:50:25 UTC
+++ SeqLib/fermi-lite/Makefile
@@ -1,6 +1,6 @@
-CC=			gcc
-CFLAGS=		-g -Wall -O2 -Wno-unused-function #-fno-inline-functions -fno-inline-functions-called-once
-CPPFLAGS=
+CC ?=			gcc
+CFLAGS ?=		-g -Wall -O2 -Wno-unused-function #-fno-inline-functions -fno-inline-functions-called-once
+CPPFLAGS ?=
 INCLUDES=	
 OBJS=		kthread.o misc.o \
 			bseq.o htab.o bfc.o \