I solved the issue.
Inorder to build ROS from source under Natty I just applied this 
modified patch (copied it to the opencv2 folder) and added the line

SVN_PATCH = pythontest.patch v4l_2.6.38.patch

to the Makefile.

The Opencv package now builds with Natty (but i guess not with older 
Ubuntu anymore ;-)

Make sure that libv4l-dev is installed.


Cheers,

Markus








On 03.05.2011 22:41, Markus Eich wrote:
> 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
> modules/haartraining/CMakeFiles/opencv_createsamples.dir/createsamples.o
> Linking CXX executable ../../bin/opencv_createsamples
> ../../lib/libopencv_highgui.so.2.2.0: undefined reference to
> `cvCreateCameraCapture_V4L(int)'
> 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?
>
> Cheers,
>
> Markus
> _______________________________________________
> ros-users mailing list
> ros-users@code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users


-- 
Dipl. Inf. Markus Eich
Researcher

DFKI Bremen
Robotics Innovation Center
Mary-Somerville-Str. 9
28359 Bremen, Germany

Phone: +49 (0)421 17845-4105
Fax:   +49 (0)421 17845-4150
E-Mail: markus.eich@dfki.de

Weitere Informationen: http://www.dfki.de/robotik
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