I've been creating a sample project to get myself comfortable with the
nodelet/pluginlib context lately. In doing so I've come across the
following problem:
When running my nodelet it fails to start with the an error message
indicating it's having trouble locating a symbol within one of its
dependencies:
/opt/ros/cturtle/stacks/common/nodelet/bin/nodelet: symbol lookup
error: /home/somervil/Projects/rdk2context/stacks/video_nodelet/lib/libvideonodelet.so:
undefined symbol:
_Z20usb_cam_camera_startPKc17usb_cam_io_method20usb_cam_pixel_formatii
and then
I know the following:
* My nodelet is dependent on usb_cam which I have listed as a
dependency in the manifest.
* libusb_cam.so is where the offending undefined symbol should live.
* libusb_cam.so has been build and exists in usb_cam/lib
* usb_cam is in the ROS_PACKAGE_PATH
* usb_cam is exporting it's relevant path
It's unclear to me how the nodelet/plugin system would be aware of a
nodelet's dependencies, and where to look for them, thus explaining
the problem I'm seeing. But since I haven't seem other people raise
the issue, I imagine I must be doing something wrong.
The only think I can imagine is that I'm supposed to be passing the
dependencies to the nodelets manager but in looking in the nodelet
code, that doesn't seem to be correct.
TL;DR: Does anyone know how to supply the nodelet manager with the
info it needs to resolve symbols from dependencies?
Andy Somerville
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