uboot编译报错解决

uboot编译报错。

root@ubuntu:/home/gjt/uboot/u-boot-2015.01# make 

scripts/kconfig/conf --silentoldconfig Kconfig
scripts/kconfig/conf --silentoldconfig Kconfig
  CHK     include/config.h
  GEN     include/autoconf.mk
cc1: error: bad value (armv5te) for -march= switch
make[2]: *** [include/autoconf.mk] Error 1
make[1]: *** [silentoldconfig] Error 1

make: *** No rule to make target `include/config/auto.conf', needed by `include/config/uboot.release'.  Stop.

原因：没有指定ARM cross toolchain交叉编译工具链