title: Opencv 3.0.0 extra modules not found
body: <p>I'm using OpenCV 3.0.0 in ubuntu linux console.</p>
  
  <p>I need to use SURF, but i've read that it's not included in the main OpenCV installation, so i've followed the opencv_contrib GIT steps:</p>
  
  <p>1) I successfully cloned opencv_contrib in my ubuntu</p>
  
  <p>2) I run "cmake -D OPENCV_EXTRA_MODULES_PATH=/home/ubuntu/opencv/opencv_contrib/modules/ /home/ubuntu/opencv/". No errors. Everything fine.</p>
  
  <p>3)make -j5. I get exactly the same errors than when i didn't cloned opencv_contrib ( error: no matching function for call to ‘cv::xfeatures2d::SURF::SURF(int&amp;)’)</p>
  
  <p>I've read <a href="https://github.com/Itseez/opencv_contrib/issues/107" rel="nofollow">here</a> that some versions of opencv_contrib dosen't work with opencv 3.0.0</p>
  
  <p>Any idea if this is my problem?
  Am i doing something wrong?</p>
  
  <p>Thank you in advance</p>