--- pptp-1.6.0.orig/Makefile	2005-02-18 02:42:45.000000000 +0100
+++ pptp-1.6.0/Makefile	2011-01-16 21:44:38.000000000 +0100
@@ -11,14 +11,15 @@ BINDIR=$(DESTDIR)/usr/sbin
 MANDIR=$(DESTDIR)/usr/share/man/man8
 PPPDIR=$(DESTDIR)/etc/ppp
 
-CC	= gcc
+CC	?= gcc
 RM	= rm -f
 OPTIMIZE= -O0
 DEBUG	= -g
 INCLUDE =
-CFLAGS  = -Wall $(OPTIMIZE) $(DEBUG) $(INCLUDE)
-LIBS	= -lutil
-LDFLAGS	=
+CPPFLAGS ?= 
+CFLAGS  ?= -Wall $(OPTIMIZE) $(DEBUG) $(INCLUDE)
+LIBS	?= -lutil
+LDFLAGS	?=
 
 PPTP_BIN = pptp
 
