GCC 版本下载地址，这里比较全，gcc版本必定要对应，否则就会各类不兼容依赖，把人折腾疯了

https://gcc.gnu.org/releases.html

http://rpm.pbone.net/index.php3?stat=3&search=gcc&srodzaj=3&dist[]=77

好比，我必定要 gcc-4.4.7-16.el6.x86_64.rpm 难找

http://rpm.pbone.net/index.php3/stat/4/idpl/30818691/dir/scientific_linux_6/com/gcc-4.4.7-16.el6.x86_64.rpm.html