From: Marco d'Itri <md@linux.it>
Date: Wed, 25 Jan 2012 19:14:26 +0100
Subject: [PATCH] pppdump_use_zlib

support building pppdump with the system zlib
---
 pppdump/Makefile.linux |   28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/pppdump/Makefile.linux b/pppdump/Makefile.linux
index 8cd54fd..158ed1a 100644
--- a/pppdump/Makefile.linux
+++ b/pppdump/Makefile.linux
@@ -2,9 +2,33 @@ DESTDIR = $(INSTROOT)@DESTDIR@
 BINDIR = $(DESTDIR)/sbin
 MANDIR = $(DESTDIR)/share/man/man8
 
+DO_DEFLATE=y
+DO_BSD_COMPRESS=y
+HAVE_ZLIB=n
+
 CFLAGS=-O2 -g
 COPTS= -I../include/net
-OBJS = pppdump.o bsd-comp.o deflate.o zlib.o
+OBJS = pppdump.o
+LIBS =
+
+ifdef DO_DEFLATE
+COPTS += -DDO_DEFLATE=1
+OBJS += deflate.o
+ifdef HAVE_ZLIB
+LIBS += -lz
+else
+OBJS += zlib.o
+endif
+else
+COPTS += -DDO_DEFLATE=0
+endif
+
+ifdef DO_BSD_COMPRESS
+COPTS += -DDO_BSD_COMPRESS=1
+OBJS += bsd-comp.o
+else
+COPTS += -DDO_BSD_COMPRESS=0
+endif
 
 INSTALL= install
 
@@ -14,7 +38,7 @@ all:	pppdump
 	$(CC) $(COPTS) $(CFLAGS) -c $<
 
 pppdump: $(OBJS)
-	$(CC) $(LDFLAGS) -o pppdump $(OBJS)
+	$(CC) $(LDFLAGS) -o pppdump $(OBJS) $(LIBS)
 
 clean:
 	rm -f pppdump $(OBJS) *~