Actually, I've been having the same problem since yesterday.

locore.o: In function `switch_restored':
locore.o(.text+0xb50): undefined reference to `ras_lookup'
init_sysent.o(.data+0x101c): undefined reference to `sys_rasctl'
kern_exec.o: In function `sys_execve':
kern_exec.o(.text+0xab5): undefined reference to `ras_purgeall'
kern_exit.o: In function `exit1':
kern_exit.o(.text+0x117): undefined reference to `ras_purgeall'
kern_fork.o: In function `fork1':
kern_fork.o(.text+0x48e): undefined reference to `ras_fork'
sys_process.o: In function `sys_ptrace':
sys_process.o(.text+0x295): undefined reference to `ras_lookup'
trap.o: In function `trap':
trap.o(.text+0x5d2): undefined reference to `ras_lookup'

-- 
Hisashi T Fujinaka - htodd@twofifty.com
BSEE (6/86) + BSChem (3/95) + BAEnglish (8/95) + $2.50 = mocha latte