Centos 5.11升级安装gcc5.3，傻瓜式安装脚本

环境

[root@tiboo3 ~]# cat /etc/redhat-release
CentOS release 5.11 (Final)

编译安装gcc

#!/bin/bash    
GCC_V='5.3.0'    
sudo yum install -y glibc-static libstdc++-static     
wget http://ftp.gnu.org/gnu/gcc/gcc-${GCC_V}/gcc-${GCC_V}.tar.bz2  -O gcc-${GCC_V}.tar.bz2    
tar jxvf gcc-${GCC_V}.tar.bz2    
cd gcc-${GCC_V}    
./contrib/download_prerequisites    
cd ..    
mkdir build_gcc${GCC_V}    
cd build_gcc${GCC_V}    
./gcc-${GCC_V}/configure --enable-checking=release --enable-languages=c,c++ --disable-multilib    
make -j8    
sudo make install    
cd ..    
rm -rf build_gcc${GCC_V} gcc-${GCC_V} gcc-${GCC_V}.tar.bz2

卸载旧版本

yum remove -y gcc
updatedb

链接新版本

cd /usr/bin/
ln -s /usr/local/bin/g++ g++
ln -s /usr/local/bin/gcc gcc

检查gcc版本

[root@tiboo3 ~]# gcc -v
 Using built-in specs.
 COLLECT_GCC=gcc
 COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
 Target: x86_64-unknown-linux-gnu
 Configured with: ./configure --enable-checking=release --enable-languages=c,c++ --disable-multilib
 Thread model: posix
 gcc version 5.3.0 (GCC)

后期源码编译安装.tar包的时候会出现

./configure: error: C compiler cc is not found

解决办法：
sudo ln -s /usr/local/bin/gcc /usr/bin/cc