在Linux CentOS 6.6上安装Python 2.7.9

CentOS 6.6自带的是Python 2.6.6，而编译llvm需要Python 2.7以上。

yum中最新的也是Python 2.6.6，只能下载Python 2.7.9的源代码自己编译安装。

操作步骤如下：

1）安装devtoolset

yum groupinstall "Development tools"

2）安装编译Python需要的包

yum install zlib-devel
yum install bzip2-devel
yum install openssl-devel
yum install ncurses-devel
yum install sqlite-devel

3）下载并解压Python 2.7.9的源代码

cd /opt
wget --no-check-certificate https://www.python.org/ftp/python/2.7.9/Python-2.7.9.tar.xz
tar xf Python-2.7.9.tar.xz
cd Python-2.7.9

4）编译与安装Python 2.7.9

./configure --prefix=/usr/local
make && make altinstall  #注意这里是altinstall

5）将python命令指向Python 2.7.9

ln -s /usr/local/bin/python2.7 /usr/local/bin/python

6）检查Python版本

#python -V
Python 2.7.9

转自：http://www.cnblogs.com/dudu/p/4294238.html