摘自：https://www.cnblogs.com/felixzh/p/5110939.html

测试时1、2就可以了第3步好像不那么重要

1.先安装 ：sudo apt-get install build-essential

2.查看 gcc 版本 然后安装 统一版本的 g++

gcc --version

gcc (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

3 安装 g++

sudo apt-get install g++-4.4

4查看安装版本

g++ --version
g++ (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.