"About FreeBSD" 부록 CD 커널 컴파일 에러

안녕하세요.
지난주에 "About FreeBSD"책을 구매하여, 부록 CD에 있는 FreeBSD 4.1을
설치하였읍니다.

Chapter6에 있는 커널 컴파일을 해 보았읍니다.
#cd /sys/i386/conf
#cp GENERIC MYKERNEL
#cd /usr/src
#make buildkernel KERNEL=MYKERNEL
을 해보니,
다음과 같은 error message가 발생합니다.

===> wi
@ -> /usr/src/sys
machine -> /usr/src/sys/i386/include
perl @/kern/makedevops.pl -h @/kern/device_if.m
perl @/kern/makedevops.pl -h @/kern/bus_if.m
rm -f .depend
mkdep -f .depend -a -nostdinc -D_KERNEL -DKLD_MODULE -I- -I. -I@ -I@/../includ
e -I/usr/obj/usr/src/i386/usr/include /usr/src/sys/modules/wi/../../i386/isa/if
_wi.c
cc -c -x assembler-with-cpp -DLOCORE -O -Wall -Wredundant-decls -Wnested-externs
-Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual
-fformat-extensions -ansi -nostdinc -I- -I. -I/usr/src/sys -I/usr/include -D_
KERNEL -include opt_global.h -elf -mpreferred-stack-boundary=2 /usr/src/sys/i38
6/i386/locore.s
/tmp/cckf8390.s: Assembler messages:
/tmp/cckf8390.s:1747: Error: .space specifies non-absolute value
/tmp/cckf8390.s:2473: Error: undefined symbol L0^A in operation setting PTmap
/tmp/cckf8390.s:2473: Error: undefined symbol PDRSHIFT in operation setting PTma
p
/tmp/cckf8390.s:1715: Error: undefined symbol L0^A in operation
/tmp/cckf8390.s:1715: Error: undefined symbol PAGE_SIZE in operation

어떻게 해야 하나요?