# 二. Issues

# 1. 解决 fatal error: Eigen/Core: No such file or directory

参考连接:https://www.cnblogs.com/long5683/p/13406666.html

1)确认是否安装了eigen3

sudo apt-get install libeigen3-dev

解决 fatal error: Eigen/Core: No such file or directory

2)如果已经安装,但当调用 eigen 库时,报错:fatal error: Eigen/Core: No such file or directory

这是因为 eigen 库默认安装在了 /usr/include/eigen3/Eigen 路径下,需使用下面命令映射到 /usr/include 路径下

sudo ln -s /usr/include/eigen3/Eigen /usr/include/Eigen