title: OpenCV project on iPhone - opencv.hpp building issue
body: <p>I've cloned <a href="https://github.com/niw/iphone_opencv_test">https://github.com/niw/iphone_opencv_test</a> and tried to replace</p>
  
  <pre><code>#import &lt;opencv2/imgproc/imgproc_c.h&gt;
  #import &lt;opencv2/objdetect/objdetect.hpp&gt;
  </code></pre>
  
  <p>with </p>
  
  <pre><code>#import &lt;opencv2/opencv.hpp&gt;
  </code></pre>
  
  <p>in <code>OpenCVTestViewController.m</code> file. But XCode threw following error:</p>
  
  <pre><code>iphone_opencv_test/opencv_device/include/opencv2/opencv.hpp:55:10: fatal error: 'opencv2/calib3d/calib3d.hpp' file not found [2]
   #include "opencv2/calib3d/calib3d.hpp"
  </code></pre>
  
  <p>So, I've tried to remove the line <code>#include "opencv2/calib3d/calib3d.hpp"</code> from the <code>opencv.hpp</code> file. The error below was thrown:</p>
  
  <pre><code>iphone_opencv_test/opencv_device/include/opencv2/ml/ml.hpp:2075:10: fatal error: 'map' file not found [2]
   #include &lt;map&gt;
  </code></pre>
  
  <p>I've also tried to change .m to .mm, but it seemed futile. Where I'm wrong?</p>