centos6.5 手动安装gcc
gcc版本：gcc-4.4.7
rpm -Uvh mpfr-2.4.1-6.el6.x86_64.rpm
rpm -Uvh cpp-4.4.7-16.el6.x86_64.rpm
rpm -Uvh libgomp-4.4.7-16.el6.x86_64.rpm
rpm -Uvh libgcc-4.4.7-16.el6.x86_64.rpm
rpm -Uvh ppl-0.10.2-11.el6.x86_64.rpm
rpm -Uvh cloog-ppl-0.15.7-1.2.el6.x86_64.rpm
rpm -Uvh gcc-4.4.7-16.el6.x86_64.rpm
到此安装结束如需安装gcc++
rpm -Uvh gcc-c++-4.4.7-16.el6.x86_64.rpm