--- Makefile
+++ Makefile
@@ -1,5 +1,6 @@
 TGT=noip2
 CC=gcc
+CFLAGS=-Wall -g
 PKG=noip-2.1.tgz
 
 PREFIX=/usr/local
@@ -22,7 +23,7 @@
 # ARCH=sun
 
 ${TGT}: Makefile ${TGT}.c 
-	${CC} -Wall -g -D${ARCH} -DPREFIX=\"${PREFIX}\" ${TGT}.c -o ${TGT} ${LIBS}
+	${CC} ${CFLAGS} -D${ARCH} -DPREFIX=\"${PREFIX}\" ${TGT}.c -o ${TGT} ${LIBS}
 
 install: ${TGT} 
 	if [ ! -d ${BINDIR} ]; then mkdir -p ${BINDIR};fi