diff -up dhcprelay-1.2/Makefile.make dhcprelay-1.2/Makefile
--- dhcprelay-1.2/Makefile.make	2006-03-21 03:46:28.000000000 +0100
+++ dhcprelay-1.2/Makefile	2011-01-11 13:41:19.351123143 +0100
@@ -1,8 +1,22 @@
+CC      = gcc
+CFLAGS  = -O2 -Wall -W -D_BSD_SOURCE
+LIBS    = -lpcap -ldnet
+
+prefix=/usr/local
+sbindir=$(prefix)/sbin
+
+all: dhcprelay
+
 dhcprelay: dhcprelay.o
-	gcc -g -o $@ -Wall -L/usr/local/lib -lpcap -ldnet $>
+	$(CC) $(LDFLAGS) -g -o $@ -Wall -L/usr/local/lib $< $(LIBS)
 
 dhcprelay.o: dhcprelay.c
-	gcc -g -c -o $@ -Wall -I/usr/local/include $<
+	$(CC) $(CFLAGS) -g -c -o $@ -Wall -I/usr/local/include $<
 
 clean:
 	rm -f dhcprelay.o dhcprelay dhcprelay.core
+
+install:
+	mkdir -p $(DESTDIR)$(sbindir)
+	chmod 755 dhcprelay
+	cp -f dhcprelay $(DESTDIR)$(sbindir)