uclinux toolchain installation ( cross compiler setting error)

Hello,Candido.I do what you told,but I also got a error.I changed the branch,when I make the image,there is a error:

{standard input}: Assembler messages:

{standard input}:96: Error: unrecognised instruction flushda

{standard input}:232: Error: unrecognised instruction flushda

{standard input}:365: Error: unrecognised instruction flushda

{standard input}:428: Error: unrecognised instruction flushda

make[3]: *** [arch/nios2/mm/memory.o] 错误 1

LD arch/nios2/drivers/built-in.o

make[2]: *** [arch/nios2/mm] 错误 2

make[2]: *** 正在等待未完成的任务....

make[2]: *** wait: 没有子进程。 停止。

make[1]: *** [sub-make] 错误 2

make[1]:正在离开目录 `/usr/local/src/nios2-linux/linux-2.6'

make: *** [linux] 错误 1

root@lc-desktop:/usr/local/src/nios2-linux/uClinux-dist#

why?Can you help me ?