centOs7 升级cmake3

1. 卸载旧版本cmake2

yum remove cmake

2. 下载安装cmake3

   wget https://github.com/Kitware/CMake/releases/download/v3.17.2/cmake-3.17.2.tar.gz
   
   tar -zxvf cmake-3.17.2.tar.gz
   
   cd cmake-3.17.2.tar.gz
   
   ./bootstrap --prefix=/usr/local/cmake
   
   gmake
   
   gmake install
   
   

3. 添加系统环境变量

sudo vi /etc/profile

然后在profile文件的最后添加一行

export PATH=$PATH:/usr/local/cmake/bin