Eigen3.3.90安装记录-Ubuntu16.04

1.删除之前eigen版本
一般默认安装在/usr/include下，下面是删除安装在/usr/include下的eigen:

sudo rm -rf /usr/include/eigen3
sudo rm -rf /usr/lib/cmake/eigen3

下面是删除安装在/usr/local/include下的eigen:

sudo rm -rf /usr/local/include/eigen3

2.安装eigen

git clone https://github.com/eigenteam/eigen-git-mirror
cd eigen-git-mirror
mkdir build
cd build
cmake ..	#此处默认安装在/usr/local/include下
sudo make install

使用如下命令安装在/usr/include下:

cmake .. -DCMAKE_INSTALL_PREFIX=/usr
sudo make install

查看eigen的安装版本

cat /usr/include/eigen3/Eigen/src/Core/util/Macros.h