[Solved] OpenCv 3 and link problem

asked 2015-09-21 06:05:00 -0600

Denis Gottardello
83 ●1 ●5 ●9 http://www.denisgottar...

updated 2015-09-25 11:16:56 -0600

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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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 ( 2015-09-23 23:06:34 -0600 )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 ( 2015-09-24 03:05:04 -0600 )edit

are those static libs ?

berak ( 2015-09-24 03:13:11 -0600 )edit

As static because if I use -DBUILD_SHARED_LIBS=ON I obtain ar error at cmake time.

Denis Gottardello ( 2015-09-24 07:16:16 -0600 )edit

then, linking order definitely matters.

(also, please do not make answers, when it should be a comment..)

berak ( 2015-09-24 07:31:48 -0600 )edit

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 ( 2015-09-24 07:38:59 -0600 )edit

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answered 2015-09-25 11:15:54 -0600

Denis Gottardello
83 ●1 ●5 ●9 http://www.denisgottar...

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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[Solved] OpenCv 3 and link problem

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