OpenCV with Python and Java support using cmake command line

Question

I am trying to install latest OpenCV from here: https://github.com/opencv/opencv on my Ubuntu 20.04. I need python and java support. I have installed a lot of per-requisites and used this cmake command to configure the build using the command line: The output was this: I see that cmake finds my python 2 and python 3 versions, finds also my java

Accepted Answer

Meanwhile I found the reason. The problem was this option: -DBUILD_opencv_world=ONWhen I removed it:$ cmake -DBUILD_SHARED_LIBS=OFF -DOPENCV_EXTRA_MODULES_PATH=/home/plamen/Install/OpenCV_install_info/OpenCV/opencv/build/opencv_contrib/modules         -DUSE_AVX_INSTRUCTIONS=ON -DUSE_SSE4_INSTRUCTIONS=ON         -DWITH_QT=ON -DWITH_OPENGL=ON  -DOpenGL_GL_PREFERENCE=GLVND         -DWITH_CUDA=ON -DWITH_TESSERACT=ON         -DWITH_LAPACK=ON -DLAPACKE_INCLUDE_DIR=/home/plamen/Install/OpenCV_install_info/lapack-3.9.0/LAPACKE/include         -DLAPACK_CBLAS_H=/home/plamen/Install/OpenCV_install_info/lapack-3.9.0/CBLAS/include/cblas.h         -DLAPACK_LAPACKE_H=/home/plamen/Install/OpenCV_install_info/lapack-3.9.0/LAPACKE/include/lapacke.h         -DWITH_GSTREAMER=ON -DWITH_EIGEN=ON -DWITH_GTK=ON -DWITH_JASPER=ON -DWITH_FFMPEG=ON         -DBUILD_EXAMPLES=ON -DINSTALL_C_EXAMPLES=ON -DINSTALL_PYTHON_EXAMPLES=ON         -DOPENCV_ENABLE_NONFREE=ON -DINSTALL_TESTS=ON -DINSTALL_PYTHON_SAMPLES=ON -DINSTALL_C_SAMPLES=ON -DOPENCV_FORCE_3RDPARTY_BUILD=ON         -DPYTHON2_EXECUTABLE=/usr/bin/python2.7 -DPYTHON2_LIBRARY=/usr/lib/x86_64-linux-gnu/libpython2.7.so         -DPYTHON2_INCLUDE_DIR=/usr/include/python2.7 -DPYTHON2_NUMPY_INCLUDE_DIR=/usr/include/python2.7/numpy         -DPYTHON2_PACKAGES_PATH=/usr/lib/python2.7/dist-packages         -DPYTHON3_EXECUTABLE=/usr/bin/python3 -DPYTHON3_LIBRARY=/usr/lib/x86_64-linux-gnu/libpython3.8.so         -DPYTHON3_INCLUDE_DIR=/usr/include/python3.8 -DPYTHON3_NUMPY_INCLUDE_DIR=/usr/include/python3.8/numpy         -DPYTHON3_PACKAGES_PATH=/usr/lib/python3/dist-packages -DOPENCV_FORCE_PYTHON_LIBS=ON         -DPYTHON_DEFAULT_EXECUTABLE=$(which python3) -DBUILD_NEW_PYTHON_SUPPORT=ON -DBUILD_opencv_python3=ON -DHAVE_opencv_python3=ON         -DBUILD_JAVA=ON -DBUILD_opencv_java=ON -DBUILD_opencv_java_bindings_generator=ON -DBUILD_opencv_java_bindings_gen=ON         -DJAVA_AWT_INCLUDE_PATH=/usr/lib/jvm/jdk-14.0.1/include -DJAVA_AWT_LIBRARY=/usr/lib/jvm/jdk-14.0.1/lib/libjawt.so         -DJAVA_INCLUDE_PATH=/usr/lib/jvm/jdk-14.0.1/include -DJAVA_INCLUDE_PATH2=/usr/lib/jvm/jdk-14.0.1/include/linux         -DJAVA_JVM_LIBRARY=/usr/lib/jvm/jdk-14.0.1/lib/server/libjvm.so         -DBUILD_TESTS=ON -DBUILD_opencv_imgproc=ON -DBUILD_opencv_imgcodecs=ON -DBUILD_opencv_core=ON         -DOPENCV_GENERATE_PKGCONFIG=ON .. java was found successfuly and I got this nice output:-- -- General configuration for OpenCV 4.4.0-pre =====================================--   Version control:               4.3.0-529-ga5fdcf9881-- --   Extra modules:--     Location (extra):            /home/plamen/Install/OpenCV_install_info/OpenCV/opencv/build/opencv_contrib/modules--     Version control (extra):     4.3.0-77-g52200a82-- --   Platform:--     Timestamp:                   2020-07-06T18:51:57Z--     Host:                        Linux 5.4.0-40-generic x86_64--     CMake:                       3.16.3--     CMake generator:             Unix Makefiles--     CMake build tool:            /usr/bin/make--     Configuration:               Release-- --   CPU/HW features:--     Baseline:                    SSE SSE2 SSE3--       requested:                 SSE3--     Dispatched code generation:  SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX--       requested:                 SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX--       SSE4_1 (17 files):         + SSSE3 SSE4_1--       SSE4_2 (2 files):          + SSSE3 SSE4_1 POPCNT SSE4_2--       FP16 (1 files):            + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX--       AVX (5 files):             + SSSE3 SSE4_1 POPCNT SSE4_2 AVX--       AVX2 (31 files):           + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2--       AVX512_SKX (7 files):      + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX-- --   C/C++:--     Built as dynamic libs?:      NO--     C++ standard:                11--     C++ Compiler:                /usr/bin/c++  (ver 9.3.0)--     C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG  -DNDEBUG--     C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g  -O0 -DDEBUG -D_DEBUG--     C Compiler:                  /usr/bin/cc--     C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG  -DNDEBUG--     C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -g  -O0 -DDEBUG -D_DEBUG--     Linker flags (Release):      -Wl,--exclude-libs,libippicv.a -Wl,--exclude-libs,libippiw.a   -Wl,--gc-sections -Wl,--as-needed  --     Linker flags (Debug):        -Wl,--exclude-libs,libippicv.a -Wl,--exclude-libs,libippiw.a   -Wl,--gc-sections -Wl,--as-needed  --     ccache:                      NO--     Precompiled headers:         NO--     Extra dependencies:          ade Qt5::Test Qt5::Concurrent Qt5::OpenGL Qt5::Core Qt5::Gui Qt5::Widgets /usr/lib/x86_64-linux-gnu/libfreetype.so /usr/lib/x86_64-linux-gnu/libharfbuzz.so /usr/lib/x86_64-linux-gnu/hdf5/serial/libhdf5.so /usr/lib/x86_64-linux-gnu/libpthread.so /usr/lib/x86_64-linux-gnu/libsz.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libdl.so /usr/lib/x86_64-linux-gnu/libm.so correspondence multiview numeric /usr/lib/x86_64-linux-gnu/libglog.so gflags_shared m pthread /usr/lib/x86_64-linux-gnu/libOpenGL.so /usr/lib/x86_64-linux-gnu/libGLX.so /usr/lib/x86_64-linux-gnu/libGLU.so cudart_static -lpthread dl rt nppc nppial nppicc nppidei nppif nppig nppim nppist nppisu nppitc npps cublas cudnn cufft -L/usr/local/cuda/lib64 -L/usr/lib/x86_64-linux-gnu--     3rdparty dependencies:       ittnotify libprotobuf zlib libjpeg-turbo libwebp libpng libtiff libjasper IlmImf quirc ippiw ippicv-- --   OpenCV modules:--     To be built:                 alphamat aruco bgsegm bioinspired calib3d ccalib core cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev cvv datasets dnn dnn_objdetect dnn_superres dpm face features2d flann freetype fuzzy gapi hdf hfs highgui img_hash imgcodecs imgproc intensity_transform java line_descriptor ml objdetect optflow phase_unwrapping photo plot python2 python3 quality rapid reg rgbd saliency sfm shape stereo stitching structured_light superres surface_matching text tracking ts video videoio videostab xfeatures2d ximgproc xobjdetect xphoto--     Disabled:                    world--     Disabled by dependency:      ---     Unavailable:                 cnn_3dobj js julia matlab ovis viz--     Applications:                tests perf_tests examples apps--     Documentation:               NO--     Non-free algorithms:         YES-- --   GUI: --     QT:                          YES (ver 5.12.8)--       QT OpenGL support:         YES (Qt5::OpenGL 5.12.8)--     GTK+:                        NO--     OpenGL support:              YES (/usr/lib/x86_64-linux-gnu/libOpenGL.so /usr/lib/x86_64-linux-gnu/libGLX.so /usr/lib/x86_64-linux-gnu/libGLU.so)--     VTK support:                 NO-- --   Media I/O: --     ZLib:                        build (ver 1.2.11)--     JPEG:                        build-libjpeg-turbo (ver 2.0.5-62)--     WEBP:                        build (ver encoder: 0x020f)--     PNG:                         build (ver 1.6.37)--     TIFF:                        build (ver 42 - 4.0.10)--     JPEG 2000:                   build Jasper (ver 1.900.1)--     OpenEXR:                     build (ver 2.3.0)--     HDR:                         YES--     SUNRASTER:                   YES--     PXM:                         YES--     PFM:                         YES-- --   Video I/O:--     DC1394:                      NO--     FFMPEG:                      YES--       avcodec:                   YES (58.54.100)--       avformat:                  YES (58.29.100)--       avutil:                    YES (56.31.100)--       swscale:                   YES (5.5.100)--       avresample:                NO--     GStreamer:                   YES (1.16.2)--     v4l/v4l2:                    YES (linux/videodev2.h)-- --   Parallel framework:            pthreads-- --   Trace:                         YES (with Intel ITT)-- --   Other third-party libraries:--     Intel IPP:                   2020.0.0 Gold [2020.0.0]--            at:                   /home/plamen/Install/OpenCV_install_info/OpenCV/opencv/build/3rdparty/ippicv/ippicv_lnx/icv--     Intel IPP IW:                sources (2020.0.0)--               at:                /home/plamen/Install/OpenCV_install_info/OpenCV/opencv/build/3rdparty/ippicv/ippicv_lnx/iw--     Lapack:                      NO--     Eigen:                       YES (ver 3.3.7)--     Custom HAL:                  NO--     Protobuf:                    build (3.5.1)-- --   NVIDIA CUDA:                   YES (ver 11.0, CUFFT CUBLAS)--     NVIDIA GPU arch:             30 35 37 50 52 60 61 70 75 80--     NVIDIA PTX archs:-- --   cuDNN:                         YES (ver 8.0.1)-- --   OpenCL:                        YES (no extra features)--     Include path:                /home/plamen/Install/OpenCV_install_info/OpenCV/opencv/3rdparty/include/opencl/1.2--     Link libraries:              Dynamic load-- --   Python 2:--     Interpreter:                 /usr/bin/python2.7 (ver 2.7.18)--     Libraries:                   /usr/lib/x86_64-linux-gnu/libpython2.7.so (ver 2.7.18rc1)--     numpy:                       /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.16.5)--     install path:                /usr/lib/python2.7/dist-packages/cv2/python-2.7-- --   Python 3:--     Interpreter:                 /usr/bin/python3 (ver 3.8.2)--     Libraries:                   /usr/lib/x86_64-linux-gnu/libpython3.8.so (ver 3.8.2)--     numpy:                       /usr/lib/python3/dist-packages/numpy/core/include (ver 1.17.4)--     install path:                /usr/lib/python3/dist-packages/cv2/python-3.8-- --   Python (for build):            /usr/bin/python3-- --   Java:                          --     ant:                         /snap/bin/ant (ver 1.10.8)--     JNI:                         /usr/lib/jvm/jdk-14.0.1/include /usr/lib/jvm/jdk-14.0.1/include/linux /usr/lib/jvm/jdk-14.0.1/include--     Java wrappers:               YES--     Java tests:                  YES-- --   Install to:                    /usr/local-- ------------------------------------------------------------------- -- Configuring done-- Generating done-- Build files have been written to: /home/plamen/Install/OpenCV_install_info/OpenCV/opencv/buildPlease, can somebody explain me why this option blocks the java? And do I need this option to be ON?

Advertisement

Answer