ft@ft:~/work/firefly-rk3399/firefly-sdk$ ./build.sh kernel
processing option: kernel
============Start build kernel============
TARGET_ARCH =
TARGET_KERNEL_CONFIG =
TARGET_KERNEL_DTS =
Makefile:660: arch//Makefile: 没有那个文件或目录
make: *** No rule to make target ‘arch//Makefile’。 停止。
====Build kernel failed!====