CentOS操作系统 GCC升级到4.6.1

一、安装环境

系统版本：centos6.0 X64

原GCC版本：gcc-4.4.4

新GCC版本：gcc-4.6.1

二、正式安装

1、下载安装的源码：

如下需要下载以下包：gcc-4.6.1.tar.bz2 gmp-4.3.2.tar.bz2 mpc-0.8.1.tar.gz mpfr-2.4.2.tar.bz2
下载地址如下：
wget ftp://gcc.gnu.org/pub/gcc/infrastructure/{gmp-4.3.2.tar.bz2,mpc-0.8.1.tar.gz,mpfr-2.4.2.tar.bz2} wget http://ftp.gnu.org/gnu/gcc/gcc-4.6.1/gcc-4.6.1.tar.bz2 即可！

2、解压安装：安装有先后顺序：GMP、MPFR、MPC、GCC

安装GMP:  tar jxf gmp-4.3.2.tar.bz2 &&cd gmp-4.3.2/ ;     ./configure –prefix=/usr/local/gmp/      &&make     &&make install

安装MPFR:

cd ../ ;tar jxf mpfr-2.4.2.tar.bz2 ;cd mpfr-2.4.2/ ;     ./configure –prefix=/usr/local/mpfr –with-gmp=/usr/local/gmp       &&make      &&make install

安装MPC:

cd ../ ;tar xzf mpc-0.8.1.tar.gz ;cd mpc-0.8.1 ;     ./configure –prefix=/usr/local/mpc –with-mpfr=/usr/local/mpfr –with-gmp=/usr/local/gmp        &&make       &&make install

安装GCC：

cd ../ ;tar jxf gcc-4.6.1.tar.bz2 ;cd gcc-4.6.1 ;        ./configure –prefix=/usr/local/gcc –enable-threads=posix –disable-checking –disable-multilib –enable-languages=c,c++ –with-gmp=/usr/local/gmp –with-mpfr=/usr/local/mpfr/ –with-mpc=/usr/local/mpc/

然后执行如下：

export    LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mpc/lib:/usr/local/gmp/lib:/usr/local/mpfr/lib/

//这一步很关键，设置变量，不设置后面会报错。

make && make install

安装完毕即可！然后做一个链接就可以使用GCC了

mkdir -p  /data/backup/`date +%Y%m%d`

mv /usr/bin/{gcc,g++}      /data/backup/`date +%Y%m%d`

新建软链接：

ln -s /usr/local/gcc/bin/gcc          /usr/bin/gcc

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

三、测试GCC

直接输入gcc -v 可以查看到gcc 版本为4.6.1和相关的编译参数就ok了！附上一个最简单的安装脚本：

#!/bin/sh
##auto make install gcc
##2012-07-03
tar jxf gmp-4.3.2.tar.bz2 &&cd gmp-4.3.2/ ;./configure –prefix=/usr/local/gmp/ &&make &&make install

sleep 1
cd ../ ;tar jxf mpfr-2.4.2.tar.bz2 ;cd mpfr-2.4.2/ ;./configure –prefix=/usr/local/mpfr –with-gmp=/usr/local/gmp &&make &&make install

cd ../ ;tar xzf mpc-0.8.1.tar.gz ;cd mpc-0.8.1 ;./configure –prefix=/usr/local/mpc –with-mpfr=/usr/local/mpfr –with-gmp=/usr/local/gmp &&make &&make install

cd ../ ;tar jxf gcc-4.6.1.tar.bz2 ;cd gcc-4.6.1 ;./configure –prefix=/usr/local/gcc –enable-threads=posix –disable-checking –disable-multilib –enable-languages=c,c++ –with-gmp=/usr/local/gmp –with-mpfr=/usr/local/mpfr/ –with-mpc=/usr/local/mpc/

if
[ $? -eq 0 ];then
echo “This gcc configure is success”
else
echo “This gcc configure is failed”
fi
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mpc/lib:/usr/local/gmp/lib:/usr/local/mpfr/lib/

make && make install

[ $? -eq 0 ]&&echo This is make install success

本文出自 “烟雨楼台” 博客，http://wgkgood.blog.51cto.com/1192594/917632