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I'm trying to link my JNI Android application with OpenCV but I get these errors

./obj/local/armeabi
/libopencv_calib3d.a(calibinit.cpp.o): In function `cvDrawChessboardCorners':
calibinit.cpp:(.text+0x20a): undefined reference to `cvLine'
calibinit.cpp:(.text+0x244): undefined reference to `cvLine'
calibinit.cpp:(.text+0x26e): undefined reference to `cvCircle'
calibinit.cpp:(.text+0x2ec): undefined reference to `cvLine'
calibinit.cpp:(.text+0x4ce): undefined reference to `cvLine'
calibinit.cpp:(.text+0x504): undefined reference to `cvLine'
calibinit.cpp:(.text+0x532): undefined reference to `cvCircle'
./obj/local/armeabi/libopencv_calib3d.a(calibinit.cpp.o): In function `cvFindChessboardCorners':
calibinit.cpp:(.text+0x1b6a): undefined reference to `cvRectangle'
./obj/local/armeabi/libopencv_calib3d.a(calibinit.cpp.o): In function `cv::findCirclesGrid(cv::_InputArray const&, cv::Size_<int>, cv::_OutputArray const&, int, cv::Ptr<cv::FeatureDetector> const&)':
calibinit.cpp:(.text+0x5058): undefined reference to `cv::FeatureDetector::detect(cv::Mat const&, std::vector<cv::KeyPoint, std::allocator<cv::KeyPoint> >&, cv::Mat const&) const'
./obj/local/armeabi/libopencv_calib3d.a(circlesgrid.cpp.o): In function `cv::findCirclesGridDefault(cv::_InputArray const&, cv::Size_<int>, cv::_OutputArray const&, int)':
circlesgrid.cpp:(.text+0x2ce): undefined reference to `cv::SimpleBlobDetector::Params::Params()'
circlesgrid.cpp:(.text+0x2dc): undefined reference to `cv::SimpleBlobDetector::SimpleBlobDetector(cv::SimpleBlobDetector::Params const&)'
./obj/local/armeabi/libopencv_calib3d.a(circlesgrid.cpp.o): In function `CirclesGridFinder::drawHoles(cv::Mat const&, cv::Mat&) const':
circlesgrid.cpp:(.text+0xa56): undefined reference to `cv::line(cv::Mat&, cv::Point_<int>, cv::Point_<int>, cv::Scalar_<double> const&, int, int, int)'
circlesgrid.cpp:(.text+0xafa): undefined reference to `cv::line(cv::Mat&, cv::Point_<int>, cv::Point_<int>, cv::Scalar_<double> const&, int, int, int)'
circlesgrid.cpp:(.text+0xb44): undefined reference to `cv::circle(cv::Mat&, cv::Point_<int>, int, cv::Scalar_<double> const&, int, int, int)'
./obj/local/armeabi/libopencv_calib3d.a(circlesgrid.cpp.o): In function `CirclesGridFinder::drawBasis(std::vector<cv::Point_<float>, std::allocator<cv::Point_<float> > > const&, cv::Point_<float>, cv::Mat&) const':
circlesgrid.cpp:(.text+0x106c): undefined reference to `cv::line(cv::Mat&, cv::Point_<int>, cv::Point_<int>, cv::Scalar_<double> const&, int, int, int)'
./obj/local/armeabi/libopencv_calib3d.a(circlesgrid.cpp.o): In function `CirclesGridFinder::drawBasisGraphs(std::vector<Graph, std::allocator<Graph> > const&, cv::Mat&, bool, bool) const':
circlesgrid.cpp:(.text+0x133c): undefined reference to `cv::circle(cv::Mat&, cv::Point_<int>, int, cv::Scalar_<double> const&, int, int, int)'
circlesgrid.cpp:(.text+0x13bc): undefined reference to `cv::line(cv::Mat&, cv::Point_<int>, cv::Point_<int>, cv::Scalar_<double> const&, int, int, int)'
./obj/local/armeabi/libopencv_calib3d.a(circlesgrid.cpp.o): In function `CirclesGridClusterFinder::parsePatternPoints(std::vector<cv::Point_<float>, std::allocator<cv::Point_<float> > > const&, std::vector<cv::Point_<float>, std::allocator<cv::Point_<float> > > const&, std::vector<cv::Point_<float>, std::allocator<cv::Point_<float> > >&)':
circlesgrid.cpp:(.text+0x3292): undefined reference to `cv::flann::LinearIndexParams::LinearIndexParams()'
circlesgrid.cpp:(.text+0x32c6): undefined reference to `cv::flann::Index::Index(cv::_InputArray const&, cv::flann::IndexParams const&, cvflann::flann_distance_t)'
circlesgrid.cpp:(.text+0x346a): undefined reference to `cv::flann::SearchParams::SearchParams(int, float, bool)'
circlesgrid.cpp:(.text+0x347e): undefined reference to `cv::flann::Index::knnSearch(cv::_InputArray const&, cv::_OutputArray const&, cv::_OutputArray const&, int, cv::flann::SearchParams const&)'
circlesgrid.cpp:(.text+0x3484): undefined reference to `cv::flann::IndexParams::~IndexParams()'
circlesgrid.cpp:(.text+0x3658): undefined reference to `cv::flann::Index::~Index()'
circlesgrid.cpp:(.text+0x365e): undefined reference to `cv::flann::IndexParams::~IndexParams()'
circlesgrid.cpp:(.text+0x36b6): undefined reference to `cv::flann::Index::~Index()'
circlesgrid.cpp:(.text+0x36bc): undefined reference to `cv::flann::IndexParams::~IndexParams()'
circlesgrid.cpp:(.text+0x3702): undefined reference to `cv::flann::IndexParams::~IndexParams()'
circlesgrid.cpp:(.text+0x370c): undefined reference to `cv::flann::Index::~Index()'
./obj/local/armeabi/libopencv_calib3d.a(circlesgrid.cpp.o): In function `CirclesGridFinder::computeRNG(Graph&, std::vector<cv::Point_<float>, std::allocator<cv::Point_<float> > >&, cv::Mat*) const':
circlesgrid.cpp:(.text+0x4b2a): undefined reference to `cv::line(cv::Mat&, cv::Point_<int>, cv::Point_<int>, cv::Scalar_<double> const&, int, int, int)'
circlesgrid.cpp:(.text+0x4b7e): undefined reference to `cv::circle(cv::Mat&, cv::Point_<int>, int, cv::Scalar_<double> const&, int, int, int)'
circlesgrid.cpp:(.text+0x4bd4): undefined reference to `cv::circle(cv::Mat&, cv::Point_<int>, int, cv::Scalar_<double> const&, int, int, int)'
./obj/local/armeabi/libopencv_imgproc.a(contours.cpp.o): In function `cv::drawContours(cv::_OutputArray const&, cv::_InputArray const&, int, cv::Scalar_<double> const&, int, int, cv::_InputArray const&, int, cv::Point_<int>)':
contours.cpp:(.text+0x3fd2): undefined reference to `cvDrawContours'
./obj/local/armeabi/libopencv_imgproc.a(samplers.cpp.o): In function `cvSampleLine':
samplers.cpp:(.text+0x65a2): undefined reference to `cvInitLineIterator'
./obj/local/armeabi/libopencv_imgproc.a(templmatch.cpp.o): In function `cv::crossCorr(cv::Mat const&, cv::Mat const&, cv::Mat&, cv::Size_<int>, int, cv::Point_<int>, double, int)':
templmatch.cpp:(.text+0x47e): undefined reference to `cv::getOptimalDFTSize(int)'
templmatch.cpp:(.text+0x494): undefined reference to `cv::getOptimalDFTSize(int)'
templmatch.cpp:(.text+0x92c): undefined reference to `cv::dft(cv::_InputArray const&, cv::_OutputArray const&, int, int)'
templmatch.cpp:(.text+0xfa4): undefined reference to `cv::dft(cv::_InputArray const&, cv::_OutputArray const&, int, int)'
templmatch.cpp:(.text+0x1006): undefined reference to `cv::mulSpectrums(cv::_InputArray const&, cv::_InputArray const&, cv::_OutputArray const&, int, bool)'
templmatch.cpp:(.text+0x102e): undefined reference to `cv::dft(cv::_InputArray const&, cv::_OutputArray const&, int, int)'
collect2: ld returned 1 exit status
make: *** [obj/local/armeabi/libarengine.so] Error 1

I'm linking with 3 modules: opencv_core opencv_calib3d opencv_imgproc. What am I missing ?

Edit. I've added opencv_flann library and reduced the error count. But where are cv::line or for example cv::rectangle are defined ?

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3 Answers 3

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20

The problem was in the libraries order. The correct order is:

LOCAL_STATIC_LIBRARIES :=  libopencv_calib3d opencv_features2d opencv_flann opencv_imgproc opencv_core

So the main principle is you have to declare libraries in reverse order of their dependency (e.g. *opencv_imgproc* depends on *opencv_core* and *opencv_features2d* depends on *opencv_imgproc* and so on).

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2

You are missing opencv_highgui and probably opencv_features2d as well.

cv::rectangle is defined at opencv_core.

Make sure that your file is being linked with all these libraries.

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2

You can also look at the output of pkg-config --static --libs opencv to arrange the libraries in the correct order.

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