[Question about linking for shared libraries*] Hi, I'm not sure there's any completely standard way to install third-party stacks right now, but I see you have umd-ros-pkg installed as /opt/ros/cturtle/stacks/umd-ros-pkg. That should be fine. You should be able to run "roscd camera_info_manager" and "roscd uvc_camera". If those work, "rosmake uvc_camera" should build all of the nodes and nodelets. No roscreate-pkg usage is necessary. I'm not sure why the linking error is occurring only for the nodelet library. [*] Does anyone know what could be causing this: "" make[3]: Entering directory `/opt/ros/cturtle/stacks/umd-ros-pkg/camera_umd/uvc_camera/build' Linking CXX executable ../bin/camera_node make[3]: Entering directory `/opt/ros/cturtle/stacks/umd-ros-pkg/camera_umd/uvc_camera/build' Linking CXX shared library ../lib/libnodelet_uvc_camera.so /usr/bin/ld: cannot find -lcamera_info_manager collect2: ld returned 1 exit status "" ? Notice that camera_node builds fine even though it also uses libcamera_info_manager. The uvc_camera package depends on the camera_info_manager package, which has the following in its manifest: 20 21 23 It's as if the -l flag is getting passed to the nodelet build but the -L is not. I don't have this problem on my installations, though -- either for c-turtle or for unstable. uvc_camera's CMakeLists.txt: "" rosbuild_add_library(nodelet_uvc_camera src/nodelets.cpp src/camera.cpp src/stereo.cpp src/uvc_cam.cpp) rosbuild_add_executable(camera_node src/camera_node.cpp src/camera.cpp src/uvc_cam.cpp) "" - Ken