Hello, I am trying to write a plugin for a camera. The building works fine, but when I launch the world I get the following error
Error [Plugin.hh:141] Failed to load plugin libvtol_camera.so: /home/mago/Development/Repository/ROS/labrob_hydro_hetcont/devel/lib/libvtol_camera.so: undefined symbol: _ZTIN6gazebo17DepthCameraPluginE
I am using Gazebo 2.1 and ROS hydro
I found a solution. I forgot to link the library in the CMakeLists.txt file
target_link_libraries(${PROJECT_NAME} ${catkin_LIBRARIES} ${GAZEBO_LIBRARIES} ${ARMADILLO_LIBRARIES} DepthCameraPlugin )
I still cannot understand what is going on, any clue please?
I see that the question is kind of related to this one: http://answers.gazebosim.org/question/5113/symbol-lookup-error-in-example-plugin/
The question you linked me refers to a gazebo bug. Until I got some reference problems I run the 2.2 version of Gazebo and the problem was not solved. Some details my plugin is declaread in this way
class camera : public DepthCameraPlugin
moreover in the load function
void camera::Load(sensors::SensorPtr _parent, sdf::ElementPtr _sdf){
DepthCameraPlugin::Load(_parent, _sdf);
...
}
I believe that is the line that causes the problem. Any ideas?
Asked: 2013-12-03 10:44:05 -0500
Seen: 1,270 times
Last updated: Feb 05 '14
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This may happen when your plugin is built but not linked, could you try adding this (if you don't have it already) to your CMakeLists file:
target_link_libraries(vtol_camera ${catkin_LIBRARIES})Hi, the plugin is actually linked: target_link_libraries(${PROJECT_NAME} ${catkin_LIBRARIES} ${GAZEBO_LIBRARIES} ${ARMADILLO_LIBRARIES} )