ros/catkin — pull request #681 by k-okada (2014-09-08 11:48:20+00:00)
Title: suggest what to do when CATKIN_NONHOMOGENEOUS_WORKSPACE

this has been asked several times and answers is try catkin_make_isolated

http://answers.ros.org/question/66696/error-with-catkin_make-when-building-package-beginner_tutorials/
http://answers.ros.org/question/66169/pcl-17-install-on-groovy/