From owner-freebsd-current  Thu Oct 16 15:47:10 1997
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To: current@freebsd.org
cc: brian@freebsd.org
Subject: Whoops!  Kernel ppp now *requires* the packet filter.
Date: Thu, 16 Oct 1997 15:47:12 -0700
Message-ID: <888.877042032@time.cdrom.com>
From: "Jordan K. Hubbard" <jkh@time.cdrom.com>
Sender: owner-freebsd-current@freebsd.org
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sh ../../conf/newvers.sh ZAPHOD -DCOMPAT_43 -DMSDOSFS -DNFS -DFFS -DINET
cc -O -pipe -Wreturn-type -Wcomment -Wredundant-decls -Wimplicit  -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes  -Wpointer-arith  -nostdinc -I- -I. -I../.. -I../../../include -DCOMPAT_43 -DMSDOSFS -DNFS -DFFS -DINET -DKERNEL -include opt_global.h -c vers.c
loading kernel
if_ppp.o: Undefined symbol `_bpf_validate' referenced from text segment
if_ppp.o: Undefined symbol `_bpf_filter' referenced from text segment
if_ppp.o: Undefined symbol `_bpf_filter' referenced from text segment
if_ppp.o: Undefined symbol `_bpf_filter' referenced from text segment
if_ppp.o: Undefined symbol `_bpf_filter' referenced from text segment
*** Error code 1

I somehow doubt that this is intentional. :)