问题遇到的现象和发生背景
autoware1.14编译时出现许多报错，到了不会解决的地方了。
操作环境、软件版本等信息
ubuntu18.04 。autoware.ai-1.14
尝试过的解决方法
前面的报错都解决了 ，到了看不懂的地方了没有什么头绪。
目前是想到了用ros装一下少的包，但是感觉不是这个问题。想来看看大家的建议
我想要达到的结果
完成编译。正常运行软件
报错如下，CMakeList的find_package()是这一块有问题吗，不了解这个。
CMake Error at /opt/ros/melodic/share/pcl_conversions/cmake/pcl_conversionsConfig.cmake:113 (message):
Project 'pcl_conversions' specifies '/usr/include/eigen3' as an include
dir, which is not found. It does neither exist as an absolute directory
nor in '${prefix}//usr/include/eigen3'. Check the issue tracker
'https://github.com/ros-perception/perception_pcl/issues' and consider
creating a ticket if the problem has not been reported yet.
Call Stack (most recent call first):
/opt/ros/melodic/share/catkin/cmake/catkinConfig.cmake:76 (find_package)
CMakeLists.txt:4 (find_package)
