1. 安装依赖包

[root@rpi3 ~]# yum -y install gc gcc gcc++ gcc-c++ wget make libxml2  libxml2-devel  openssl  openssl-devel  curl-devel  libjpeg-devel  libpng-devel freetype-devel bison autoconf openldap-devel pcre-devel zlib-devel

1. 下载镜像 从CentOS官方下载，地址：http://mirror.centos.org/altarch/7/isos/armhfp/CentOS-Userland-7-armv7hl-Minimal-1708-RaspberryPi3.img.xz