linux 离线安装gcc4.8.5 (简单易懂,已成功安装): mpfr-3.1.1-4.el7.x86_64.rpm libmpc-1.0.1-3.el7.x86_64.rpm kernel-headers-3.10.0-862.el7.x86_64.rpm glibc-headers-2.17-222.el7.x86_64.rpm glibc-devel-2.17-222.el7.x86_64.rpm cpp-4.8.5-28.el7.x86_64.rpm gcc-4.8.5-28.el7.x86_64.rpm