【环境搭建】ubuntu18.04安装Eigen3

1，介绍 Eigen下载地址:https://gitlab.com/libeigen/eigen/-/releases

2，安装 2.1 编译

git clone https://github.com/eigenteam/eigen-git-mirror.git cd eigen-git-mirror mkdir build cd build cmake .. sudo make install

2.2 复制目录

sudo cp -r /usr/local/include/eigen3/Eigen /usr/local/include

eigen3 被默认安装到了usr/local/include

3,方式二

sudo apt-get install libeigen3-dev