[ros-users] Compiling ROS with Ubuntu 11.04 (Natty)

Markus Eich markus.eich at dfki.de
Tue May 3 20:41:36 UTC 2011

Dear all,

I am facing a problem with compiling the ROS sources under Natty.

While building the opencv2 package, I got the following linking error:

Linking CXX static library ../../lib/libopencv_haartraining_engine.a
[ 80%] Built target opencv_haartraining_engine
Scanning dependencies of target opencv_createsamples
[ 80%] Building CXX object 
Linking CXX executable ../../bin/opencv_createsamples
../../lib/libopencv_highgui.so.2.2.0: undefined reference to 
collect2: ld returned 1 exit status
make[2]: *** [bin/opencv_createsamples] Fehler 1
make[1]: *** 
[modules/haartraining/CMakeFiles/opencv_createsamples.dir/all] Fehler 2

It seems it has to do with the linking of V4L. I have the lib4vl-dev 
package installed.
According to my prior web search there seems to be the issue that V4L 
has moved out of the kernel source.

Do you have any clues?



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