cmake error - Eigen

[ShaharSarShalom]

I'm trying to compile the QtKittiVisualizer, I'm not a linux expert so please be gentle with me.

1. I started by compiling the PCL library.

2. Then I compiled the eigen (3.1) library (Since I saw that QtKittiVisualizer needs it)

3. Then I tried to create a make file for QtKittiVisualizer using cmake. I get the error below (this also includes an output image)

** I placed that path to the of eigen compilation output to Eigen_Dir, However it still doesn't work.

This might have nothing to do with QtKittiVisualizer, Do you have any suggestions how to solve this and continue on with QtKittiVisualizer compilation ?

`CMake Warning at /home/iaiai/Documents/Shahar/PointCloudClassificaiton/Tools/PCL/BUILDOUTPUT/PCLConfig.cmake:148 (find_package): By not providing "FindEigen.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "Eigen", but CMake did not find one.

Could not find a package configuration file provided by "Eigen" (requested version 3.1) with any of the following names:

EigenConfig.cmake
eigen-config.cmake

Add the installation prefix of "Eigen" to CMAKE_PREFIX_PATH or set "Eigen_DIR" to a directory containing one of the above files. If "Eigen" provides a separate development package or SDK, be sure it has been installed. Call Stack (most recent call first): /home/iaiai/Documents/Shahar/PointCloudClassificaiton/Tools/PCL/BUILDOUTPUT/PCLConfig.cmake:302 (find_eigen) /home/iaiai/Documents/Shahar/PointCloudClassificaiton/Tools/PCL/BUILDOUTPUT/PCLConfig.cmake:531 (find_external_library) CMakeLists.txt:40 (find_package)

CMake Error at /home/iaiai/Documents/Shahar/PointCloudClassificaiton/Tools/PCL/BUILDOUTPUT/PCLConfig.cmake:56 (message): common is required but eigen was not found Call Stack (most recent call first): /home/iaiai/Documents/Shahar/PointCloudClassificaiton/Tools/PCL/BUILDOUTPUT/PCLConfig.cmake:351 (pcl_report_not_found) /home/iaiai/Documents/Shahar/PointCloudClassificaiton/Tools/PCL/BUILDOUTPUT/PCLConfig.cmake:531 (find_external_library) CMakeLists.txt:40 (find_package)`

[MarkMuth]

It seems like PCL requires Eigen. It finds it when you compile it, but it won't find it if you include it in another project like QtKittiVisualizer. The only workaround I could find was to copy the FindEigen.cmake from the PCL source code point CMake to it using the CMAKE_MODULE_PATH. Please refer to the latest changes in the CMakeLists.txt file.

[joedavid-tuni]

It seems like PCL requires Eigen. It finds it when you compile it, but it won't find it if you include it in another project like QtKittiVisualizer. The only workaround I could find was to copy the FindEigen.cmake from the PCL source code point CMake to it using the CMAKE_MODULE_PATH. Please refer to the latest changes in the CMakeLists.txt file.

which is done by set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};path_to_pcl-pcl-1.13.0/cmake/Modules") in your CMakeLists.txt