工具链
gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz
https://releases.linaro.org/components/toolchain/binaries/7.3-2018.05/arm-linux-gnueabihf/
GCC编译过程
交叉编译工具链安装
sudo dpkg —add-architecture i386
sudo apt-get update
sudo apt-get install g++-5-multilib
sudo apt-get install lsb-core lib32stdc++6
sudo apt-get instal make
sudo apt-get install build-essential
sudo apt-get install libncurses5-dev