https://github.com/Kitware/CMake/releases/download/v3.18.0-rc2/cmake-3.18.0-rc2.tar.gz下载：tar.gz的包
解压：tar -zxvf 包
查找：cd到解压后的包路径
检查树：./bootstrap
编译：make
编译安装：make install
清除：rehash cmake
查看：cmake --version
