install-space builds error linking against libsns_ik_util.so

[IanTheEngineer]

As I was setting up the CI jobs for ROS Indigo, I seem to have run into a bug (which is the whole point of setting up the CI in the first place :) The command:

/bin/sh -c catkin config --extend /opt/ros/$ROS_DISTRO --install --cmake-args -DCMAKE_BUILD_TYPE=Release &&     catkin build --catkin-make-args run_tests

The error:

Starting >>> sns_ik_examples                                                   
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Errors << sns_ik_examples:install /root/ws_sns_ik/logs/sns_ik_examples/build.install.000.log
/usr/bin/ld: warning: libsns_ik_util.so, needed by /root/ws_sns_ik/install/lib/libsns_ik.so, not found (try using -rpath or -rpath-link)
/root/ws_sns_ik/install/lib/libsns_ik.so: undefined reference to `sns_ik::pinv_QR(Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1>*, double)'
/root/ws_sns_ik/install/lib/libsns_ik.so: undefined reference to `sns_ik::pinv_damped_P(Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1>*, Eigen::Matrix<double, -1, -1, 0, -1, -1>*, double, double)'
/root/ws_sns_ik/install/lib/libsns_ik.so: undefined reference to `sns_ik::pinv_forBarP(Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1>*)'
/root/ws_sns_ik/install/lib/libsns_ik.so: undefined reference to `sns_ik::isIdentity(Eigen::Matrix<double, -1, -1, 0, -1, -1> const&)'
/root/ws_sns_ik/install/lib/libsns_ik.so: undefined reference to `sns_ik::pinv_QR_Z(Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1>*, Eigen::Matrix<double, -1, -1, 0, -1, -1>*, double, double)'
/root/ws_sns_ik/install/lib/libsns_ik.so: undefined reference to `sns_ik::pinv(Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1>*, double)'
collect2: error: ld returned 1 exit status
make[2]: *** [/root/ws_sns_ik/devel/.private/sns_ik_examples/lib/sns_ik_examples/all_ik_tests] Error 1
make[1]: *** [CMakeFiles/all_ik_tests.dir/all] Error 2
make: *** [all] Error 2
cd /root/ws_sns_ik/build/sns_ik_examples; catkin build --get-env sns_ik_examples | catkin env -si  /usr/bin/make install; cd -
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Failed << sns_ik_examples:install               [ Exited with code 2 ]