Path: utzoo!attcan!uunet!cs.utexas.edu!sdd.hp.com!uakari.primate.wisc.edu!dali.cs.montana.edu!mathisen
From: mathisen@dali.cs.montana.edu (Jaye Mathisen)
Newsgroups: comp.unix.ultrix
Subject: Re: Ultrix 2.2 Kernel Rebuild Problem
Message-ID: <2693@dali>
Date: 18 Oct 90 13:51:02 GMT
References: <1112@flash.UUCP>
Organization: Montana State University, Dept. of Computer Science, Bozeman MT 59717
Lines: 11

In article <1112@flash.UUCP> klg@summation.wa.com.UUCP (Kevin L. Gross) writes:
># make
>/bin/cc -I. -c -S -DSIGMA4 -DMVAX -DRPC -DNFS -DUFS -DEMULFLT -DINET -DQUOTA -DKERNEL -DUPGRADE=0 -DSWAPTYPE=0 ../vax/swap.c
>loading vmunix
>Undefined:
>_bbr_start



I would try a make clean in your build directory, and then run
config /sys/conf/HOSTNAME again, followed by the make depend, make stuff.