MAKE UBOOT时出现如下错误，请教各位啦。谢谢

seapeak

在LINUX2.4.20下编译uboot1。1。2时，运行命令MAKE后出现提示：
[root@localhost u-boot-1.1.2wang]# make
make[1]: Entering directory `/usr/u-boot-1.1.2wang/tools'
make[1]: `.depend' is up to date.
make[1]: Leaving directory `/usr/u-boot-1.1.2wang/tools'
make[1]: Entering directory `/usr/u-boot-1.1.2wang/examples'
make[1]: `.depend' is up to date.
make[1]: Leaving directory `/usr/u-boot-1.1.2wang/examples'
make[1]: Entering directory `/usr/u-boot-1.1.2wang/post'
make[1]: `.depend' is up to date.
make[1]: Leaving directory `/usr/u-boot-1.1.2wang/post'
make[1]: Entering directory `/usr/u-boot-1.1.2wang/post/cpu'
make[1]: *** No rule to make target `asm.S', needed by `.depend'. Stop.
make[1]: Leaving directory `/usr/u-boot-1.1.2wang/post/cpu'
make: *** [depend] Error 2
请问是何原因，如何修改。多谢！