编译armlinux时的问题

loadable

我在为at91rm9200编译内核时碰到一些问题.
环境:
linux-2.4.24.tar.bz2
patch-2.4.24-vrsl.bz2
cross-3.2.tar.gz
我在 make menuconfig 时选择at91rm9200系统类型.
其余并没有 特别设置
在 make zImage后产生如下错误:

arm-linux-ld -p -X -T arch/arm/vmlinux.lds arch/arm/kernel/head-armv.o arch/arm/kernel/init_task.o init/main.o init/version.o init/do_mounts.o \
--start-group \
arch/arm/kernel/kernel.o arch/arm/mm/mm.o arch/arm/mach-at91rm9200/at91rm9200.o kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o \
drivers/serial/serial.o drivers/char/char.o drivers/block/block.o drivers/misc/misc.o drivers/net/net.o drivers/mtd/mtdlink.o drivers/media/media.o drivers/at91/at91drv.o \
net/network.o \
arch/arm/lib/lib.a /root/linux-2.4.26/lib/lib.a \
--end-group \
-o vmlinux
arch/arm/mach-at91rm9200/at91rm9200.o: In function `at91rm9200_map_io':
arch/arm/mach-at91rm9200/at91rm9200.o(.text.init+0x5: undefined reference to `at91_register_uart'
make: *** [vmlinux] Error 1

难道 armlinux 对at91rm9200支持 不够么?
arch/arm/mach-at91rm9200/at91rm9200.o(.text.init+0x5: undefined reference to `at91_register_uart'
make: *** [vmlinux] Error 1

laughable

make dep么？？

loadable

make dep了

laughable

make clean 了么？