--- Makefile.orig	2013-05-23 16:15:41.000000000 -0400
+++ Makefile	2021-12-05 11:50:05.000000000 -0500
@@ -1,5 +1,6 @@
-CC= gcc
-CFLAGS= -Wall -O2
+CC = gcc
+CFLAGS ?= -O2
+CFLAGS += -Wall
 
 all:	ntpstat