老司机又来了...
（一）The compiler environment 编译环境
1．Error：mkimage
Solution：
sudo apt-get install u-boot-tools
2．Error：Can't locate Switch.pm in @INC (you may need to install the Switch module)Solution：
sudo apt-get install libswitch-perl
（二）Building Kernel 内核如何配置
make ARCH=arm menuconfig
切记要加上ARCH=arm
