Is java wrapper for xfeatures2d module ready?

[sify21]

I want to use surf in module xfeatures2d(just for research). I googled and tried to add "WRAP java" in the CMakeLists.txt file. Then I run:
"cmake -DOPENCV_EXTRA_MODULES_PATH=/home/sify/src/opencv_contrib/modules/ .."
in /<opencv_source_directory>/build directory but get a bunch of "symbol not found" errors.

I also tried this method in stackoverflow, also not working, it gets me "symbol lookup error: opencv/build/lib/libopencv_java310.so: undefined symbol: _ZN2cv11xfeatures2d4SURF6createEdiibb " error.

I don't know whether the java wrapper is finished or not. I'm using opencv 3.1.0 on opensuse.

[nlw0]

I had the same problem, except I was trying out BRIEF. Problem is some crazy linking order on the compilation creates a problem for the function lookup, it seems...

One way to solve it, according to this, is to export LD_PRELOAD=<your libopencv_xfeatures2d.so library>. That made it work for me, but it is definitely not the best solution. I don't know if running ldconfig should fix it, there must be just some stupid step missing.