mexOpenCV ORB example compile issue

I came across compile error on the ORB example given by the document.

The error is:

Building with 'Xcode Clang++'.
Error using mexOpenCV (line 114)
Undefined symbols for architecture x86_64:
  "ocvKeyPointsToStruct(std::__1::vector<cv::KeyPoint, std::__1::allocator<cv::KeyPoint> >&)", referenced from:
      _mexFunction in detectORBFeaturesOCV.o
  "cv::Algorithm::_create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >
  const&)", referenced from:
      _mexFunction in detectORBFeaturesOCV.o
  "cv::Exception::Exception(int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>
  > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&,
  std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int)", referenced
  from:
      _mexFunction in detectORBFeaturesOCV.o
  "cv::FeatureDetector::detect(cv::Mat const&, std::__1::vector<cv::KeyPoint, std::__1::allocator<cv::KeyPoint> >&,
  cv::Mat const&) const", referenced from:
      _mexFunction in detectORBFeaturesOCV.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Thanks in advance!