All typekit packages in https://github.com/orocos/rtt_ros_integration/tree/hydro-devel/typekits currently have the `rtt_roscomm` dependency as the transport library is linked to `librtt_rostopic-gnulinux.so`. `rtt_std_msgs` is indeed not required here.

Whether `kdl_typekit` depends on `orocos_kdl` or `orocos-kdl` should be irrelevant as long as KDL generates both pc files in https://github.com/orocos/orocos_kinematics_dynamics/blob/master/orocos_kdl/src/CMakeLists.txt#L38.