Linking issue with assimp when compiling from source on ARM

[bit-pirate]

When doing so, I got this error:

/media/pendrive/ros/groovy/catkin_workspace/devel_isolated/collada_urdf/lib/libcollada_urdf.so: undefined reference to `vtable for Assimp::IOSystem'
/media/pendrive/ros/groovy/catkin_workspace/devel_isolated/collada_urdf/lib/libcollada_urdf.so: undefined reference to `typeinfo for Assimp::IOSystem'
collect2: ld returned 1 exit status

[po1]

The trick (&patch) that I describe on the embedded sig works for me:
https://groups.google.com/d/msg/ros-sig-embedded/26XlDtZhyNs/OexZAx6BCBcJ

I will attach a patch here if you can confirm it works for you

[bit-pirate]

I'm just installing libassimp3 and will test your patch right when that is done. Will report back.

[po1]

Note: there have been reports of successful compilation after installing libassimp from source. My patch is a quick workaround to enable linking against libraries provided by distributions (ubuntu, debian). If you only need to compile from source, then you should probably not need my patch. If you want to link against the debian packaged library (for example if you want to produce a debian package yourself), you will most likely need it.

[bit-pirate]

I can confirm, that compiling from source (with libassimp3) installed works fine.

[jacquelinekay]

I'm closing this for now since you found a workaround. If someone would like to pull request the patch for ARM support into this repository, I will consider it. However, the issue seems to be related to Assimp and not collada_urdf specifically, since the arm hack includes adding a function to the Assimp namespace, so I don't believe the issue is relevant to this package specifically.

[MHassanNadeem]

Following is the path to the collada_urdf.cpp file:
/home/pi/ros_catkin_ws/src/robot_model/collada_urdf/src/collada_urdf.cpp if you are following the 'Installing ROS Indigo on the Raspberry Pi' steps on the wiki.ros.org.

[ousaz]

for me the patch works fine thanks a lot guys 💃