[ros-users] Linking problems with pcl

Hi everybody,

I get this error:
CMakeFiles/geometry_based_obstacle_detector.dir/src/geometry_based_obstacle_detector.o: In function `cloudCallback(boost::shared_ptr<sensor_msgs::PointCloud2_<std::allocator<void> > const>
const&)':
/home/skliegl/GETbot/svn/ros/pcl_tools/src/geometry_based_obstacle_detector.cpp:19: undefined reference to `pcl::getPointCloudAsEigen(sensor_msgs::PointCloud2_<std::allocator<void> > const&, Eigen3::Matrix<float, -1, -1, 0, -1,
-1>&)'

The mentioned function is:
void cloudCallback(const sensor_msgs::PointCloud2ConstPtr& cloud)
{
    Eigen3::MatrixXf points;
    pcl::getPointCloudAsEigen (*cloud, points);

}

The corresponding part of the CMakeLists.txt:
rosbuild_add_executable( geometry_based_obstacle_detector
src/geometry_based_obstacle_detector.cpp)
target_link_libraries(geometry_based_obstacle_detector pcl_io)

Any ideas?

Thank you,
Sabrina