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[Solved] OpenCv 3 and link problem
 
  
 
  
 
 
 
 
 
 asked Sep 21 '15 
 
 Denis Gottardello gravatar image  
 
 
 
 updated Sep 25 '15 
 
 
 
 
 
eigen_faces.cpp:-1: error: undefined reference to cv::LDA::subspaceProject(cv::_InputArray const&, cv::_InputArray const&, cv::_InputArray const&)'**
eigen_faces.cpp:-1: error: **undefined reference tocv::Algorithm::Algorithm()'
 
I have already linked all libraries, see above:
    LIBS += ../../opencv-3.0.0/lib/libopencv_adas300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_aruco300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_aruco_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_bgsegm300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_bgsegm_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_bioinspired300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_bioinspired_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_calib3d300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_calib3d_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_ccalib300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_ccalib_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_core300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_core_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_datasets300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_dnn300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_dnn_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_dpm300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_dpm_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_face300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_face_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_features2d300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_features2d_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_flann300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_flann_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_hal300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_hal_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_highgui300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_highgui_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_imgcodecs300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_imgcodecs_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_imgproc300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_imgproc_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_line_descriptor300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_line_descriptor_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_ml300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_ml_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_objdetect300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_objdetect_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_optflow300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_optflow_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_photo300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_photo_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_reg300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_reg_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_rgbd300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_rgbd_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_saliency300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_saliency_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_shape300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_shape_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_stereo300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_stereo_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_stitching300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_stitching_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_structured_light300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_structured_light_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_superres300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_superres_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_surface_matching300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_surface_matching_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_text300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_text_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_tracking300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_tracking_pch_dephelp.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_ts300.a
    LIBS += ../../opencv-3.0.0/lib/libopencv_ts_pch_dephelp.a
    LIBS ... (more)
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Comments
  • are those static libs ? in that case, the order matters, e.g. if face depends on core, core has to go after face
  • mingw / gcc will never complain about non-existing libs, or wrong path
  • you do not need the pch_dephelp.a things
  • rather try to use -L /path/to/libs and -lopencv_something (without .a or similar)
berak gravatar imageberak (Sep 24 '15)edit
In desperation I have linked all libraries.
I have tried to change the rows order but nothing. Each time I have obtained a different linker error.
On Linux the same order works perfectly. 
Denis Gottardello gravatar imageDenis Gottardello (Sep 24 '15)edit
are those static libs ?
berak gravatar imageberak (Sep 24 '15)edit
As static because if I use -DBUILD_SHARED_LIBS=ON I obtain ar error at cmake time.
Denis Gottardello gravatar imageDenis Gottardello (Sep 24 '15)edit
then, linking order definitely matters.
(also, please do not make answers, when it should be a comment..)
berak gravatar imageberak (Sep 24 '15)edit
1
Try to use cmake to build your application, please take a look at the example project included in OpenCV: https://github.com/Itseez/opencv/tree...
mshabunin gravatar imagemshabunin (Sep 24 '15)edit
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 answered Sep 25 '15 
 
 Denis Gottardello gravatar image  
 
 
 
 
 
Solved after many weeks on trying. The linker wants exactly only the libraries listed above, with exactly this order. The libraries can be required more than one time.
 
Can you help me this the ticket
http://answers.opencv.org/question/64...
???
 
LIBS += ../../opencv-3.0.0/lib/libopencv_core300.a
LIBS += ../../opencv-3.0.0/lib/libopencv_imgcodecs300.a
LIBS += ../../opencv-3.0.0/lib/libopencv_objdetect300.a
LIBS += ../../opencv-3.0.0/lib/libopencv_imgproc300.a
LIBS += ../../opencv-3.0.0/lib/libopencv_face300.a
LIBS += ../../opencv-3.0.0/lib/libopencv_videoio300.a
LIBS += ../../opencv-3.0.0/lib/libopencv_highgui300.a
LIBS += ../../opencv-3.0.0/lib/libopencv_video300.a
LIBS += ../../opencv-3.0.0/3rdparty/lib/libzlib.a
LIBS += ../../opencv-3.0.0/lib/libopencv_hal300.a
LIBS += ../../opencv-3.0.0/3rdparty/lib/liblibjpeg.a
LIBS += ../../opencv-3.0.0/3rdparty/lib/liblibwebp.a
LIBS += ../../opencv-3.0.0/3rdparty/lib/liblibtiff.a
LIBS += ../../opencv-3.0.0/3rdparty/lib/liblibpng.a
LIBS += ../../opencv-3.0.0/lib/libopencv_core300.a
LIBS += C:\Qt\Qt5.5.0\Tools\mingw492_32\i686-w64-mingw32\lib\libvfw32.a
LIBS += C:\Qt\Qt5.5.0\Tools\mingw492_32\i686-w64-mingw32\lib\libole32.a
LIBS += C:\Qt\Qt5.5.0\Tools\mingw492_32\i686-w64-mingw32\lib\liboleaut32.a
LIBS += C:\Qt\Qt5.5.0\Tools\mingw492_32\i686-w64-mingw32\lib\libuuid.a
LIBS += C:\Qt\Qt5.5.0\Tools\mingw492_32\i686-w64-mingw32\lib\libgdi32.a
LIBS += C:\Qt\Qt5.5.0\Tools\mingw492_32\i686-w64-mingw32\lib\libcomdlg32.a
LIBS += ../../opencv-3.0.0/3rdparty/lib/libzlib.a
LIBS += ../../opencv-3.0.0/lib/libopencv_hal300.a
 
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        Asked: Sep 21 '15 
 
 
        Seen: 2,260 times 
 

        Last updated: Sep 25 '15 
 
 
 
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