Even after following [jade/Migration for Eigen](http://wiki.ros.org/jade/Migration#Eigen_CMake_Module_in_cmake_modules), I still see that `eigen3` is not found.
https://travis-ci.org/swri-robotics/marti_common/jobs/113832799#L3181-L3193
CMake Error at CMakeLists.txt:12 (find_package):
By not providing "FindEigen3.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Eigen3", but
CMake did not find one.
Could not find a package configuration file provided by "Eigen3" with any
of the following names:
Eigen3Config.cmake
eigen3-config.cmake
Add the installation prefix of "Eigen3" to CMAKE_PREFIX_PATH or set
"Eigen3_DIR" to a directory containing one of the above files. If "Eigen3"
provides a separate development package or SDK, be sure it has been
installed.
[Someone reported that](https://github.com/swri-robotics/marti_common/issues/303#issuecomment-208510361) the build moves forward by combining `pkg_config` but I don't know if that's the best idea.
This may be happening only on `Travis CI`, using [Travis config from industrial_ci](https://github.com/ros-industrial/industrial_ci/blob/master/.travis.yml) but I'm not sure yet.
Also similar/same [issue in a PR on `moveit_core`](https://github.com/ros-planning/moveit_core/pull/290) ([error on Travis](https://travis-ci.org/ros-planning/moveit_core/jobs/126462655#L2756)).
↧