# CentOS 6.8 升级 GCC 和 Python
#作者：老农民
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#Email: flyingercn@wo.cn
#微信： ericliu_77

# 安装gcc和python编译需要的依赖包
yum -y install glibc-devel.i686 glibc-devel ncurses ncurses-devel zlib-devel bzip2-devel openssl-devel readline-devel sqlite-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

# 编译安装GCC6.2
tar xf gcc-6.2.0.tar.bz2
cd gcc-6.2.0/
./contrib/download_prerequisites
# 为了存放编译期间产生的中间文件，我们建立一个文件夹存放这些文件
mkdir gcc-build-6.2.0
cd gcc-build-6.2.0
../configure --prefix=/usr/local/gcc6 --enable-checking=release --enable-languages=c,c++ --enable-threads=posix --disable-multilib --disable-libunwind-exceptions --enable-bootstrap --with-system-zlib --with-arch=i686 --build=i686-redhat-linux
make -j8
make install
cd ../../
rm -fr gcc-6.2.0.tar.bz2
rm -fr gcc-6.2.0

gcc --version
gcc (GCC) 6.2.0
Copyright © 2016 Free Software Foundation,Inc.
本程序是自由软件；请参看源代码的版权声明。本软件没有任何担保；
包括没有适销性和某一专用目的下的适用性担保。

# 编译安装Python 2.7.12
# 使用最新安装的GCC6.2编译安装，不用系统自带的gcc4
wget https://www.python.org/ftp/python/2.7.12/Python-2.7.12.tgz
tar xf Python-2.7.12.tgz
cd Python-2.7.12/
export LD_LIBRARY_PATH=/usr/local/lib:/usr/local/gcc6/lib:/usr/local/python27/lib:/lib:/usr/lib:/lib64:/usr/lib64:/usr/local/lib64:$LD_LIBRARY_PATH
export PATH=/usr/local/bin:/usr/local/gcc6/bin:/usr/local/python27/bin:$PATH:.
CC="/usr/local/gcc6/bin/gcc" ./configure --prefix=/usr/local/python27 --enable-shared
CC="/usr/local/gcc6/bin/gcc" make -j `grep processor /proc/cpuinfo | wc -l`
CC="/usr/local/gcc6/bin/gcc" make install
cd ../
rm -fr Python-2.7.12.tgz
rm -fr Python-2.7.12

# 创建环境变量文件，如果需要使用最新的GCC和Python2.7，就执行以下文件

vi ~/env.sh
alias cc=/usr/local/gcc6/bin/gcc
alias gcc=/usr/local/gcc6/bin/gcc
alias c++=/usr/local/gcc6/bin/c++
alias g++=/usr/local/gcc6/bin/g++
alias cpp=/usr/local/gcc6/bin/cpp
export LD_LIBRARY_PATH=/usr/local/lib:/usr/local/gcc6/lib:/usr/local/python27/lib:/lib:/usr/lib:/lib64:/usr/lib64:/usr/local/lib64:$LD_LIBRARY_PATH
export PATH=/usr/local/bin:/usr/local/gcc6/bin:/usr/local/python27/bin:$PATH:.

# 每次进系统后执行以下命令即可使用最新的GCC和Python2.7
. ~/env.sh

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