--- Makefile.orig	2005-04-17 17:06:46.000000000 +0200
+++ Makefile	2005-05-14 04:39:52.315452648 +0200
@@ -1,13 +1,13 @@
 # Makefile for the pingtunnel utility
 # (c) 2004-2005 Daniel Stødle, daniels@stud.cs.uit.no
 
-CC	 		= gcc
-CFLAGS		= -Wall -g
-LDOPTS		= -lpthread -lpcap
+CC	 	?= gcc
+CFLAGS		?= -Wall -g
+LDOPTS		+= -lpthread -lpcap
 PT_OBJS		= ptunnel.o md5.o
-prefix		= /usr
+prefix		= ${PREFIX}
 bindir		= $(prefix)/bin
-mandir		= $(prefix)/share/man/man8
+mandir		= $(prefix)/man/man8
 
 all: ptunnel