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Building opencv contrib_module on linux

asked 2015-03-28 05:58:53 -0500

opencvTn gravatar image


I am trying to use the Tracking module in I have used the ccmake and successfully generated and run make -j5 without error. Modules have been built in the build directory but there's no (Extra) libraries in the /include/opencv2 . In other terms I can't locate the .hpp files generated from the contrib_modules.


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did you run a make install after that ? this should copy headers & libs

berak gravatar imageberak ( 2015-03-28 06:04:17 -0500 )edit

Yes, indeed. I get several lines like this one ([ 86%] Building CXX object modules/core/CMakeFiles/opencv_core.dir/src/alloc.cpp.o) but it's not copying the extra libs built (the one from contrib).

opencvTn gravatar imageopencvTn ( 2015-03-28 07:47:47 -0500 )edit

Actually I had some libraries disabled the first time I run the make. When I try to build all contrib library I get this error.

Linking CXX shared library ../../lib/ /usr/bin/ld: cannot find -lWRAP /usr/bin/ld: cannot find -lpython collect2: error: ld returned 1 exit status make[2]: * [lib/] Error 1 make[1]: [modules/xobjdetect/CMakeFiles/opencv_xobjdetect.dir/all] Error 2 make: ** [all] Error 2

Any idea how to fix it ?

opencvTn gravatar imageopencvTn ( 2015-03-28 12:24:36 -0500 )edit

cannot find -lWRAP

It means that you use latest version of opencv_contrib with non-latest version of opencv. Please, choose two revisions from the same time moment.

mshabunin gravatar imagemshabunin ( 2015-03-31 03:54:02 -0500 )edit

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answered 2015-03-30 06:15:45 -0500

opencvTn gravatar image

Solved using ccmake and disabling modules that seems to be broken and showing the same message in my comment.

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Yep that is indeed a big downside to the contrib modules. I am no favorite of building them all and disabling the ones you don't need. I definately think people should switch it around, create an extra CMAKE statement that allows passing all modules to a single parameter you want to built. @mshabunin what do you think?

StevenPuttemans gravatar imageStevenPuttemans ( 2015-03-31 04:43:56 -0500 )edit

Yes, I think such whitelist can be useful. Also you can try to create meta-module similar to contrib_world and build only this module.

mshabunin gravatar imagemshabunin ( 2015-04-10 08:36:44 -0500 )edit
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Asked: 2015-03-28 05:58:53 -0500

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Last updated: Mar 30 '15