030107 の次に 030118 030125 とあるので、macppc の方で動きそうな 030122 を使って まずは kernel を作って見て

188 15:16 cvs -d /e/celeron/CVSup/main co -D20030122 src/sys src/usr.sbin/confg > & /tmp/log
190 15:19 cd src
193 15:20 tar zxf /a/j/nandra/macppc-030125.tar.gz

cc1: warnings being treated as errors /export/20030122-syssrc/src/sys/arch/macppc/compile/INSECURE/../../../../arch/powerpc/powerpc/syscall.c: In function `syscall_plain': /export/20030122-syssrc/src/sys/arch/macppc/compile/INSECURE/../../../../arch/powerpc/powerpc/syscall.c:163: warning: passing arg 1 of `_kernel_proc_unlock' from incompatible pointer type *** Error code 1

というので -Werror を外して

cc -O2 -pipe -Werror -Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized -Wno-main -msoft-float -ffreestanding -I. -I../../../../arch -I../../../.. -nostdinc -DDIAGNOSTIC -DMAXUSERS=32 -D_KERNEL -D_KERNEL_OPT -Dmacppc -c /export/20030122-syssrc/src/sys/arch/macppc/compile/INSECURE/../../../../arch/powerpc/powerpc/syscall.c

/export/20030122-syssrc/src/sys/arch/macppc/compile/INSECURE/../../../../arch/macppc/macppc/machdep.c: In function `save_vec_lwp':
/export/20030122-syssrc/src/sys/arch/macppc/compile/INSECURE/../../../../arch/macppc/macppc/machdep.c:1084: `fpcpu' undeclared (first use in this function)
/export/20030122-syssrc/src/sys/arch/macppc/compile/INSECURE/../../../../arch/macppc/macppc/machdep.c:1084: (Each undeclared identifier is reported only once
/export/20030122-syssrc/src/sys/arch/macppc/compile/INSECURE/../../../../arch/macppc/macppc/machdep.c:1084: for each function it appears in.)
*** Error code 1

total 140
drwxr-xr-x 3 makoto wheel 512 Nov 23 23:42 CVSROOT/
drwxr-xr-x 19 makoto wheel 512 Nov 24 17:42 basesrc/
drwxr-xr-x 7 makoto wheel 512 Oct 9 16:32 doc/
drwxr-xr-x 3 makoto wheel 512 Oct 9 16:32 gnusrc/
drwxr-xr-x 48 makoto wheel 1024 Nov 24 01:45 htdocs/
-r--r--r-- 1 makoto wheel 3246 Nov 13 10:33 modules
-r--r--r-- 1 makoto wheel 41590 Oct 6 2000 modules,v
drwxr-xr-x 10 makoto wheel 512 Oct 30 09:08 othersrc/
drwxr-xr-x 54 makoto wheel 1536 Nov 21 08:56 pkgsrc/
drwxr-xr-x 3 makoto wheel 512 Oct 11 02:26 sharesrc/
drwxr-xr-x 4 makoto wheel 512 Nov 16 21:50 syssrc/
-rw-r--r-- 1 makoto wheel 34 Sep 17 15:49 val-tags
drwxr-xr-x 6 makoto wheel 512 Oct 11 15:03 xsrc/

この中にある二つ目の方を実行すればいいはず。