'EIGEN3_INCLUDE_DIR-NOTFOUND' not set properly

[42f87d89]

When building tf with catkin_make, the build stops with this error.

CMake Error at /home/pi/ros_catkin_ws/devel/share/kdl_conversions/cmak /kdl_conversionsConfig.cmake:
106 (message):
  Project 'kdl_conversions' specifies 'EIGEN3_INCLUDE_DIR-NOTFOUND' as an
  include dir, which is not found.  It does neither exist as an absolute
  directory nor in
  '/home/pi/ros_catkin_ws/src/tf/kdl_conversions/EIGEN3_INCLUDE_DIR-NOTFOUND'.
  Ask the maintainer 'Tully Foote <tfoote@osrfoundation.org>' to fix it.
Call Stack (most recent call first):
  /home/pi/ros_catkin_ws/devel/share/catkin/cmake/catkinConfig.cmake:75 (find_package)
  tf/tf_conversions/CMakeLists.txt:5 (find_package)


CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
EIGEN3_INCLUDE_DIR
   used as include directory in directory /home/pi/ros_catkin_ws/src/tf/eigen_conversions
   used as include directory in directory /home/pi/ros_catkin_ws/src/tf/kdl_conversions

make: *** [cmake_check_build_system] Error 1
Invoking "make cmake_check_build_system" failed

[tfoote]

Can you provide instructions how to reproduce this error? kdl_conversions has no references to eigen3 in the package.xml or CMakeLists.txt

[42f87d89]

I'm not sure.

While trying to build gmapping, I kept adding any package that was in the dependency tree manually, and attempting to build after each addition.

Once I got to tf, I've been stumped by this error.

[42f87d89]

Ok, if I remove the gmapping package from my catkin src directory, I can build it. But once I add the gmapping package this error occurs.

Why in the world does this error mention tf but not gmapping?

[tfoote]

At the bottom of the stack trace it's actually a problem when evaluating the tf_conversions which has a dependency on eigen3 which you must be missing.

Instead of randomly installing dependencies I suggest you checkout the rosinstall generator

[42f87d89]

Thank you for your time.

I apologise for opening an issue that was not related to your project.

[tfoote]

no problem. The traceback was not clear.