Weidongshan board compilation kernel problem solving

perform ：make 100ask_imx6ul_qemu_defconfig Time error

Can't find default configuration "arch/arm/configs/100ask_imx6ul_qemu_

resolvent ： First, check whether the environment variables are set correctly

export ARCH=arm
export CROSS_COMPILE=arm-linux-gnueabihf-
export PATH=$PATH:/home/book/100ask_imx6ull-qemu/ToolChain/gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf/bin

If the environment variables are OK, use the last trick ： Do it a few more times

make 100ask_imx6ul_qemu_defconfig

Finally, perfect generation ：100ask_imx6ul_qemu_