RPi 3B+ setting OPENCV_ENABLE_NONFREE:BOOL=ON does not enable "non-free algorithms" after cmake

This question was asked before, but the solutions provided, eg. [here](https://answers.opencv.org/question/201938/how-can-i-set-opencv_enable_nonfree-cmake-option-and-rebuild-the-library-in-function-create/) did not solve the problem. The problem is, that the "Non-free algorithms" are not installed. I am following [this](https://www.pyimagesearch.com/2018/09/26/install-opencv-4-on-your-raspberry-pi/) tutorial. This is my command to start the build on a RPi 3B+ with newest build of "Raspbian Buster with desktop" : (cv) pi@raspberrypi:~/opencv/build $ cmake -D CMAKE_BUILD_TYPE=RELEASE \ -D CMAKE_INSTALL_PREFIX=/usr/local \ -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib/modules \ D- ENABLE_NEON=ON cmake \ -D CMAKE_BUILD_TYPE=RELEASE \ -D CMAKE_INSTALL_PREFIX=/usr/local \ -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib/modules \ -D ENABLE_NEON=ON \ -D ENABLE_VFPV3=ON \ -D BUILD_TESTS=OFF \ -D OPENCV_ENABLE_NONFREE:BOOL=ON \ -D INSTALL_PYTHON_EXAMPLES=OFF \ -D BUILD_EXAMPLES=OFF .. This is the output: -- The CXX compiler identification is GNU 8.3.0 -- The C compiler identification is GNU 8.3.0 -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Detected processor: armv7l -- sizeof(void) = 4 on 64 bit processor. Assume 32-bit compilation mode -- Performing Test HAVE_CXX_ATOMICS_WITHOUT_LIB (check file: cmake/checks/atomic_check.cpp) -- Performing Test HAVE_CXX_ATOMICS_WITHOUT_LIB - Success -- Found PythonInterp: /usr/bin/python2.7 (found suitable version "2.7.16", minimum required is "2.7") -- Found PythonLibs: /usr/lib/arm-linux-gnueabihf/libpython2.7.so (found suitable exact version "2.7.16") -- Found PythonInterp: /home/pi/.virtualenvs/cv/bin/python3 (found suitable version "3.7.3", minimum required is "3.2") -- Found PythonLibs: /usr/lib/arm-linux-gnueabihf/libpython3.7m.so (found suitable exact version "3.7.3") -- Looking for ccache - not found -- Performing Test HAVE_CXX_FSIGNED_CHAR -- Performing Test HAVE_CXX_FSIGNED_CHAR - Success -- Performing Test HAVE_C_FSIGNED_CHAR -- Performing Test HAVE_C_FSIGNED_CHAR - Success -- Performing Test HAVE_CXX_W -- Performing Test HAVE_CXX_W - Success -- Performing Test HAVE_C_W -- Performing Test HAVE_C_W - Success -- Performing Test HAVE_CXX_WALL -- Performing Test HAVE_CXX_WALL - Success -- Performing Test HAVE_C_WALL -- Performing Test HAVE_C_WALL - Success -- Performing Test HAVE_CXX_WERROR_RETURN_TYPE -- Performing Test HAVE_CXX_WERROR_RETURN_TYPE - Success -- Performing Test HAVE_C_WERROR_RETURN_TYPE -- Performing Test HAVE_C_WERROR_RETURN_TYPE - Success -- Performing Test HAVE_CXX_WERROR_NON_VIRTUAL_DTOR -- Performing Test HAVE_CXX_WERROR_NON_VIRTUAL_DTOR - Success -- Performing Test HAVE_C_WERROR_NON_VIRTUAL_DTOR -- Performing Test HAVE_C_WERROR_NON_VIRTUAL_DTOR - Success -- Performing Test HAVE_CXX_WERROR_ADDRESS -- Performing Test HAVE_CXX_WERROR_ADDRESS - Success -- Performing Test HAVE_C_WERROR_ADDRESS -- Performing Test HAVE_C_WERROR_ADDRESS - Success -- Performing Test HAVE_CXX_WERROR_SEQUENCE_POINT -- Performing Test HAVE_CXX_WERROR_SEQUENCE_POINT - Success -- Performing Test HAVE_C_WERROR_SEQUENCE_POINT -- Performing Test HAVE_C_WERROR_SEQUENCE_POINT - Success -- Performing Test HAVE_CXX_WFORMAT -- Performing Test HAVE_CXX_WFORMAT - Success -- Performing Test HAVE_C_WFORMAT -- Performing Test HAVE_C_WFORMAT - Success -- Performing Test HAVE_CXX_WERROR_FORMAT_SECURITY -- Performing Test HAVE_CXX_WERROR_FORMAT_SECURITY - Success -- Performing Test HAVE_C_WERROR_FORMAT_SECURITY -- Performing Test HAVE_C_WERROR_FORMAT_SECURITY - Success -- Performing Test HAVE_CXX_WMISSING_DECLARATIONS -- Performing Test HAVE_CXX_WMISSING_DECLARATIONS - Success -- Performing Test HAVE_C_WMISSING_DECLARATIONS -- Performing Test HAVE_C_WMISSING_DECLARATIONS - Success -- Performing Test HAVE_CXX_WMISSING_PROTOTYPES -- Performing Test HAVE_CXX_WMISSING_PROTOTYPES - Failed -- Performing Test HAVE_C_WMISSING_PROTOTYPES -- Performing Test HAVE_C_WMISSING_PROTOTYPES - Success -- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES -- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES - Failed -- Performing Test HAVE_C_WSTRICT_PROTOTYPES -- Performing Test HAVE_C_WSTRICT_PROTOTYPES - Success -- Performing Test HAVE_CXX_WUNDEF -- Performing Test HAVE_CXX_WUNDEF - Success -- Performing Test HAVE_C_WUNDEF -- Performing Test HAVE_C_WUNDEF - Success -- Performing Test HAVE_CXX_WINIT_SELF -- Performing Test HAVE_CXX_WINIT_SELF - Success -- Performing Test HAVE_C_WINIT_SELF -- Performing Test HAVE_C_WINIT_SELF - Success -- Performing Test HAVE_CXX_WPOINTER_ARITH -- Performing Test HAVE_CXX_WPOINTER_ARITH - Success -- Performing Test HAVE_C_WPOINTER_ARITH -- Performing Test HAVE_C_WPOINTER_ARITH - Success -- Performing Test HAVE_CXX_WSHADOW -- Performing Test HAVE_CXX_WSHADOW - Success -- Performing Test HAVE_C_WSHADOW -- Performing Test HAVE_C_WSHADOW - Success -- Performing Test HAVE_CXX_WSIGN_PROMO -- Performing Test HAVE_CXX_WSIGN_PROMO - Success -- Performing Test HAVE_C_WSIGN_PROMO -- Performing Test HAVE_C_WSIGN_PROMO - Failed -- Performing Test HAVE_CXX_WUNINITIALIZED -- Performing Test HAVE_CXX_WUNINITIALIZED - Success -- Performing Test HAVE_C_WUNINITIALIZED -- Performing Test HAVE_C_WUNINITIALIZED - Success -- Performing Test HAVE_CXX_WSUGGEST_OVERRIDE -- Performing Test HAVE_CXX_WSUGGEST_OVERRIDE - Success -- Performing Test HAVE_C_WSUGGEST_OVERRIDE -- Performing Test HAVE_C_WSUGGEST_OVERRIDE - Failed -- Performing Test HAVE_CXX_WNO_DELETE_NON_VIRTUAL_DTOR -- Performing Test HAVE_CXX_WNO_DELETE_NON_VIRTUAL_DTOR - Success -- Performing Test HAVE_C_WNO_DELETE_NON_VIRTUAL_DTOR -- Performing Test HAVE_C_WNO_DELETE_NON_VIRTUAL_DTOR - Failed -- Performing Test HAVE_CXX_WNO_UNNAMED_TYPE_TEMPLATE_ARGS -- Performing Test HAVE_CXX_WNO_UNNAMED_TYPE_TEMPLATE_ARGS - Failed -- Performing Test HAVE_C_WNO_UNNAMED_TYPE_TEMPLATE_ARGS -- Performing Test HAVE_C_WNO_UNNAMED_TYPE_TEMPLATE_ARGS - Failed -- Performing Test HAVE_CXX_WNO_COMMENT -- Performing Test HAVE_CXX_WNO_COMMENT - Success -- Performing Test HAVE_C_WNO_COMMENT -- Performing Test HAVE_C_WNO_COMMENT - Success -- Performing Test HAVE_CXX_WIMPLICIT_FALLTHROUGH_3 -- Performing Test HAVE_CXX_WIMPLICIT_FALLTHROUGH_3 - Success -- Performing Test HAVE_C_WIMPLICIT_FALLTHROUGH_3 -- Performing Test HAVE_C_WIMPLICIT_FALLTHROUGH_3 - Success -- Performing Test HAVE_CXX_WNO_STRICT_OVERFLOW -- Performing Test HAVE_CXX_WNO_STRICT_OVERFLOW - Success -- Performing Test HAVE_C_WNO_STRICT_OVERFLOW -- Performing Test HAVE_C_WNO_STRICT_OVERFLOW - Success -- Performing Test HAVE_CXX_FDIAGNOSTICS_SHOW_OPTION -- Performing Test HAVE_CXX_FDIAGNOSTICS_SHOW_OPTION - Success -- Performing Test HAVE_C_FDIAGNOSTICS_SHOW_OPTION -- Performing Test HAVE_C_FDIAGNOSTICS_SHOW_OPTION - Success -- Performing Test HAVE_CXX_PTHREAD -- Performing Test HAVE_CXX_PTHREAD - Success -- Performing Test HAVE_C_PTHREAD -- Performing Test HAVE_C_PTHREAD - Success -- Performing Test HAVE_CXX_FOMIT_FRAME_POINTER -- Performing Test HAVE_CXX_FOMIT_FRAME_POINTER - Success -- Performing Test HAVE_C_FOMIT_FRAME_POINTER -- Performing Test HAVE_C_FOMIT_FRAME_POINTER - Success -- Performing Test HAVE_CXX_FFUNCTION_SECTIONS -- Performing Test HAVE_CXX_FFUNCTION_SECTIONS - Success -- Performing Test HAVE_C_FFUNCTION_SECTIONS -- Performing Test HAVE_C_FFUNCTION_SECTIONS - Success -- Performing Test HAVE_CXX_FDATA_SECTIONS -- Performing Test HAVE_CXX_FDATA_SECTIONS - Success -- Performing Test HAVE_C_FDATA_SECTIONS -- Performing Test HAVE_C_FDATA_SECTIONS - Success -- Performing Test HAVE_CXX_MFPU_VFPV3 -- Performing Test HAVE_CXX_MFPU_VFPV3 - Success -- Performing Test HAVE_CPU_NEON_SUPPORT (check file: cmake/checks/cpu_neon.cpp) -- Performing Test HAVE_CPU_NEON_SUPPORT - Failed -- Performing Test HAVE_CXX_MFPU_NEON (check file: cmake/checks/cpu_neon.cpp) -- Performing Test HAVE_CXX_MFPU_NEON - Success -- Performing Test HAVE_CPU_FP16_SUPPORT (check file: cmake/checks/cpu_fp16.cpp) -- Performing Test HAVE_CPU_FP16_SUPPORT - Failed -- Performing Test HAVE_CXX_MFPU_NEON_FP16_MFP16_FORMAT_IEEE (check file: cmake/checks/cpu_fp16.cpp) -- Performing Test HAVE_CXX_MFPU_NEON_FP16_MFP16_FORMAT_IEEE - Success -- Performing Test HAVE_CPU_BASELINE_FLAGS -- Performing Test HAVE_CPU_BASELINE_FLAGS - Success -- Performing Test HAVE_CXX_FVISIBILITY_HIDDEN -- Performing Test HAVE_CXX_FVISIBILITY_HIDDEN - Success -- Performing Test HAVE_C_FVISIBILITY_HIDDEN -- Performing Test HAVE_C_FVISIBILITY_HIDDEN - Success -- Performing Test HAVE_CXX_FVISIBILITY_INLINES_HIDDEN -- Performing Test HAVE_CXX_FVISIBILITY_INLINES_HIDDEN - Success -- Performing Test HAVE_C_FVISIBILITY_INLINES_HIDDEN -- Performing Test HAVE_C_FVISIBILITY_INLINES_HIDDEN - Failed -- Looking for pthread.h -- Looking for pthread.h - found -- Looking for posix_memalign -- Looking for posix_memalign - found -- Looking for malloc.h -- Looking for malloc.h - found -- Looking for memalign -- Looking for memalign - found -- Check if the system is big endian -- Searching 16 bit integer -- Looking for sys/types.h -- Looking for sys/types.h - found -- Looking for stdint.h -- Looking for stdint.h - found -- Looking for stddef.h -- Looking for stddef.h - found -- Check size of unsigned short -- Check size of unsigned short - done -- Using unsigned short -- Check if the system is big endian - little endian -- Found ZLIB: /usr/lib/arm-linux-gnueabihf/libz.so (found suitable version "1.2.11", minimum required is "1.2.3") -- Found JPEG: /usr/lib/arm-linux-gnueabihf/libjpeg.so (found version "62") -- Found TIFF: /usr/lib/arm-linux-gnueabihf/libtiff.so (found version "4.0.10") -- Performing Test HAVE_C_STD_C99 -- Performing Test HAVE_C_STD_C99 - Success -- Performing Test HAVE_C_WNO_UNUSED_VARIABLE -- Performing Test HAVE_C_WNO_UNUSED_VARIABLE - Success -- Performing Test HAVE_C_WNO_UNUSED_FUNCTION -- Performing Test HAVE_C_WNO_UNUSED_FUNCTION - Success -- Performing Test HAVE_C_WNO_SHADOW -- Performing Test HAVE_C_WNO_SHADOW - Success -- Performing Test HAVE_C_WNO_MAYBE_UNINITIALIZED -- Performing Test HAVE_C_WNO_MAYBE_UNINITIALIZED - Success -- Performing Test HAVE_C_WNO_MISSING_PROTOTYPES -- Performing Test HAVE_C_WNO_MISSING_PROTOTYPES - Success -- Performing Test HAVE_C_WNO_MISSING_DECLARATIONS -- Performing Test HAVE_C_WNO_MISSING_DECLARATIONS - Success -- Performing Test HAVE_C_WNO_IMPLICIT_FALLTHROUGH -- Performing Test HAVE_C_WNO_IMPLICIT_FALLTHROUGH - Success -- Found Jasper: /usr/lib/arm-linux-gnueabihf/libjasper.so (found version "1.900.1") -- Found ZLIB: /usr/lib/arm-linux-gnueabihf/libz.so (found version "1.2.11") -- Found PNG: /usr/lib/arm-linux-gnueabihf/libpng.so (found version "1.6.36") -- Looking for /usr/include/libpng/png.h -- Looking for /usr/include/libpng/png.h - found -- Looking for semaphore.h -- Looking for semaphore.h - found -- Performing Test HAVE_CXX_WNO_SHADOW -- Performing Test HAVE_CXX_WNO_SHADOW - Success -- Performing Test HAVE_CXX_WNO_UNUSED -- Performing Test HAVE_CXX_WNO_UNUSED - Success -- Performing Test HAVE_CXX_WNO_SIGN_COMPARE -- Performing Test HAVE_CXX_WNO_SIGN_COMPARE - Success -- Performing Test HAVE_CXX_WNO_UNDEF -- Performing Test HAVE_CXX_WNO_UNDEF - Success -- Performing Test HAVE_CXX_WNO_MISSING_DECLARATIONS -- Performing Test HAVE_CXX_WNO_MISSING_DECLARATIONS - Success -- Performing Test HAVE_CXX_WNO_UNINITIALIZED -- Performing Test HAVE_CXX_WNO_UNINITIALIZED - Success -- Performing Test HAVE_CXX_WNO_SWITCH -- Performing Test HAVE_CXX_WNO_SWITCH - Success -- Performing Test HAVE_CXX_WNO_PARENTHESES -- Performing Test HAVE_CXX_WNO_PARENTHESES - Success -- Performing Test HAVE_CXX_WNO_ARRAY_BOUNDS -- Performing Test HAVE_CXX_WNO_ARRAY_BOUNDS - Success -- Performing Test HAVE_CXX_WNO_EXTRA -- Performing Test HAVE_CXX_WNO_EXTRA - Success -- Performing Test HAVE_CXX_WNO_DEPRECATED_DECLARATIONS -- Performing Test HAVE_CXX_WNO_DEPRECATED_DECLARATIONS - Success -- Performing Test HAVE_CXX_WNO_MISLEADING_INDENTATION -- Performing Test HAVE_CXX_WNO_MISLEADING_INDENTATION - Success -- Performing Test HAVE_CXX_WNO_DEPRECATED -- Performing Test HAVE_CXX_WNO_DEPRECATED - Success -- Performing Test HAVE_CXX_WNO_SUGGEST_OVERRIDE -- Performing Test HAVE_CXX_WNO_SUGGEST_OVERRIDE - Success -- Performing Test HAVE_CXX_WNO_INCONSISTENT_MISSING_OVERRIDE -- Performing Test HAVE_CXX_WNO_INCONSISTENT_MISSING_OVERRIDE - Failed -- Performing Test HAVE_CXX_WNO_IMPLICIT_FALLTHROUGH -- Performing Test HAVE_CXX_WNO_IMPLICIT_FALLTHROUGH - Success -- Performing Test HAVE_CXX_WNO_TAUTOLOGICAL_COMPARE -- Performing Test HAVE_CXX_WNO_TAUTOLOGICAL_COMPARE - Success -- Performing Test HAVE_CXX_WNO_MISSING_PROTOTYPES -- Performing Test HAVE_CXX_WNO_MISSING_PROTOTYPES - Failed -- Performing Test HAVE_CXX_WNO_REORDER -- Performing Test HAVE_CXX_WNO_REORDER - Success -- Performing Test HAVE_CXX_WNO_UNUSED_RESULT -- Performing Test HAVE_CXX_WNO_UNUSED_RESULT - Success -- Performing Test HAVE_CXX_WNO_CLASS_MEMACCESS -- Performing Test HAVE_CXX_WNO_CLASS_MEMACCESS - Success -- Checking for module 'gtk+-3.0' -- Found gtk+-3.0, version 3.24.5 -- Checking for module 'gthread-2.0' -- Found gthread-2.0, version 2.58.3 -- Could not find OpenBLAS include. Turning OpenBLAS_FOUND off -- Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off -- Could NOT find Atlas (missing: Atlas_CLAPACK_INCLUDE_DIR) -- Looking for sgemm_ -- Looking for sgemm_ - not found -- Looking for pthread.h -- Looking for pthread.h - found -- Looking for pthread_create -- Looking for pthread_create - found -- Found Threads: TRUE -- Looking for dgemm_ -- Looking for dgemm_ - found -- Found BLAS: /usr/lib/arm-linux-gnueabihf/libf77blas.so;/usr/lib/arm-linux-gnueabihf/libatlas.so -- Looking for cheev_ -- Looking for cheev_ - found -- A library with LAPACK API found. -- Performing Test HAVE_CXX_WNO_UNUSED_PARAMETER -- Performing Test HAVE_CXX_WNO_UNUSED_PARAMETER - Success -- Performing Test HAVE_CXX_WNO_UNUSED_LOCAL_TYPEDEFS -- Performing Test HAVE_CXX_WNO_UNUSED_LOCAL_TYPEDEFS - Success -- Performing Test HAVE_CXX_WNO_SIGN_PROMO -- Performing Test HAVE_CXX_WNO_SIGN_PROMO - Success -- Performing Test HAVE_CXX_WNO_TAUTOLOGICAL_UNDEFINED_COMPARE -- Performing Test HAVE_CXX_WNO_TAUTOLOGICAL_UNDEFINED_COMPARE - Failed -- Performing Test HAVE_CXX_WNO_IGNORED_QUALIFIERS -- Performing Test HAVE_CXX_WNO_IGNORED_QUALIFIERS - Success -- Performing Test HAVE_CXX_WNO_UNUSED_FUNCTION -- Performing Test HAVE_CXX_WNO_UNUSED_FUNCTION - Success -- Performing Test HAVE_CXX_WNO_UNUSED_CONST_VARIABLE -- Performing Test HAVE_CXX_WNO_UNUSED_CONST_VARIABLE - Success -- Performing Test HAVE_CXX_WNO_SHORTEN_64_TO_32 -- Performing Test HAVE_CXX_WNO_SHORTEN_64_TO_32 - Failed -- Performing Test HAVE_CXX_WNO_INVALID_OFFSETOF -- Performing Test HAVE_CXX_WNO_INVALID_OFFSETOF - Success -- Performing Test HAVE_CXX_WNO_ENUM_COMPARE_SWITCH -- Performing Test HAVE_CXX_WNO_ENUM_COMPARE_SWITCH - Failed -- Found apache ant: /usr/bin/ant (1.10.5) -- Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH) -- VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file -- Performing Test CXX_HAS_MFPU_NEON -- Performing Test CXX_HAS_MFPU_NEON - Success -- Performing Test C_HAS_MFPU_NEON -- Performing Test C_HAS_MFPU_NEON - Success -- Looking for dlerror in dl -- Looking for dlerror in dl - found -- Performing Test HAVE_C_WNO_UNDEF -- Performing Test HAVE_C_WNO_UNDEF - Success -- Performing Test HAVE_C_WNO_SIGN_COMPARE -- Performing Test HAVE_C_WNO_SIGN_COMPARE - Success -- ADE: Download: v0.1.1f.zip -- OpenCV Python: during development append to PYTHONPATH: /home/pi/opencv/build/python_loader -- Checking for modules 'libavcodec;libavformat;libavutil;libswscale' -- Found libavcodec, version 58.35.100 -- Found libavformat, version 58.20.100 -- Found libavutil, version 56.22.100 -- Found libswscale, version 5.3.100 -- Checking for module 'libavresample' -- No package 'libavresample' found -- Checking for module 'gstreamer-base-1.0' -- No package 'gstreamer-base-1.0' found -- Checking for module 'gstreamer-app-1.0' -- No package 'gstreamer-app-1.0' found -- Checking for module 'gstreamer-riff-1.0' -- No package 'gstreamer-riff-1.0' found -- Checking for module 'gstreamer-pbutils-1.0' -- No package 'gstreamer-pbutils-1.0' found -- Checking for module 'libdc1394-2' -- No package 'libdc1394-2' found -- Excluding from source files list: /modules/core/test/test_intrin128.sse2.cpp -- Excluding from source files list: /modules/core/test/test_intrin128.sse3.cpp -- Excluding from source files list: /modules/core/test/test_intrin128.ssse3.cpp -- Excluding from source files list: /modules/core/test/test_intrin128.sse4_1.cpp -- Excluding from source files list: /modules/core/test/test_intrin128.sse4_2.cpp -- Excluding from source files list: /modules/core/test/test_intrin128.avx.cpp -- Excluding from source files list: /modules/core/test/test_intrin128.fp16.cpp -- Excluding from source files list: /modules/core/test/test_intrin128.avx2.cpp -- Excluding from source files list: /modules/core/test/test_intrin128.avx512_skx.cpp -- Excluding from source files list: /modules/core/test/test_intrin256.avx2.cpp -- Excluding from source files list: /modules/core/test/test_intrin256.avx512_skx.cpp -- Excluding from source files list: /modules/core/test/test_intrin512.avx512_skx.cpp -- Excluding from source files list: modules/imgproc/src/corner.avx.cpp -- Excluding from source files list: modules/imgproc/src/imgwarp.avx2.cpp -- Excluding from source files list: modules/imgproc/src/imgwarp.sse4_1.cpp -- Excluding from source files list: modules/imgproc/src/resize.avx2.cpp -- Excluding from source files list: modules/imgproc/src/resize.sse4_1.cpp -- Excluding from source files list: modules/imgproc/src/sumpixels.avx512_skx.cpp -- Registering hook 'INIT_MODULE_SOURCES_opencv_dnn': /home/pi/opencv/modules/dnn/cmake/hooks/INIT_MODULE_SOURCES_opencv_dnn.cmake -- opencv_dnn: filter out cuda4dnn source code -- Excluding from source files list: /modules/dnn/layers/layers_common.avx.cpp -- Excluding from source files list: /modules/dnn/layers/layers_common.avx2.cpp -- Excluding from source files list: /modules/dnn/layers/layers_common.avx512_skx.cpp -- Excluding from source files list: modules/features2d/src/fast.avx2.cpp -- Performing Test HAVE_CXX_WNO_OVERLOADED_VIRTUAL -- Performing Test HAVE_CXX_WNO_OVERLOADED_VIRTUAL - Success -- Performing Test HAVE_CXX_WNO_UNUSED_PRIVATE_FIELD -- Performing Test HAVE_CXX_WNO_UNUSED_PRIVATE_FIELD - Failed -- -- General configuration for OpenCV 4.1.2-pre ===================================== -- Version control: unknown -- -- Platform: -- Timestamp: 2019-09-20T20:58:10Z -- Host: Linux 4.19.66-v7+ armv7l -- CMake: 3.13.4 -- CMake generator: Unix Makefiles -- CMake build tool: /usr/bin/make -- Configuration: RELEASE -- -- CPU/HW features: -- Baseline: -- requested: DETECT -- disabled: VFPV3 NEON -- -- C/C++: -- Built as dynamic libs?: YES -- C++ Compiler: /usr/bin/c++ (ver 8.3.0) -- 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 -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -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 -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -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=non-virtual-dtor -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 -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -fvisibility=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 -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG -- Linker flags (Release): -Wl,--gc-sections -- Linker flags (Debug): -Wl,--gc-sections -- ccache: NO -- Precompiled headers: NO -- Extra dependencies: dl m pthread rt -- 3rdparty dependencies: -- -- OpenCV modules: -- To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python2 python3 stitching ts video videoio -- Disabled: world -- Disabled by dependency: - -- Unavailable: java js -- Applications: tests perf_tests apps -- Documentation: NO -- Non-free algorithms: NO -- -- GUI: -- GTK+: YES (ver 3.24.5) -- GThread : YES (ver 2.58.3) -- GtkGlExt: NO -- VTK support: NO -- -- Media I/O: -- ZLib: /usr/lib/arm-linux-gnueabihf/libz.so (ver 1.2.11) -- JPEG: /usr/lib/arm-linux-gnueabihf/libjpeg.so (ver 62) -- WEBP: build (ver encoder: 0x020e) -- PNG: /usr/lib/arm-linux-gnueabihf/libpng.so (ver 1.6.36) -- TIFF: /usr/lib/arm-linux-gnueabihf/libtiff.so (ver 42 / 4.0.10) -- JPEG 2000: /usr/lib/arm-linux-gnueabihf/libjasper.so (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 (58.35.100) -- avformat: YES (58.20.100) -- avutil: YES (56.22.100) -- swscale: YES (5.3.100) -- avresample: NO -- GStreamer: NO -- v4l/v4l2: YES (linux/videodev2.h) -- -- Parallel framework: pthreads -- -- Trace: YES (with Intel ITT) -- -- Other third-party libraries: -- Lapack: NO -- Eigen: NO -- Custom HAL: YES (carotene (ver 0.0.1)) -- Protobuf: build (3.5.1) -- -- OpenCL: YES (no extra features) -- Include path: /home/pi/opencv/3rdparty/include/opencl/1.2 -- Link libraries: Dynamic load -- -- Python 2: -- Interpreter: /usr/bin/python2.7 (ver 2.7.16) -- Libraries: /usr/lib/arm-linux-gnueabihf/libpython2.7.so (ver 2.7.16) -- numpy: /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.16.2) -- install path: lib/python2.7/dist-packages/cv2/python-2.7 -- -- Python 3: -- Interpreter: /home/pi/.virtualenvs/cv/bin/python3 (ver 3.7.3) -- Libraries: /usr/lib/arm-linux-gnueabihf/libpython3.7m.so (ver 3.7.3) -- numpy: /home/pi/.virtualenvs/cv/lib/python3.7/site-packages/numpy/core/include (ver 1.17.2) -- install path: lib/python3.7/site-packages/cv2/python-3.7 -- -- Python (for build): /usr/bin/python2.7 -- -- Java: -- ant: /usr/bin/ant (ver 1.10.5) -- JNI: NO -- Java wrappers: NO -- Java tests: NO -- -- Install to: /usr/local -- ----------------------------------------------------------------- -- -- Configuring done -- Generating done -- Build files have been written to: /home/pi/opencv/build How do I get the Non-free algorithms to be installed? I deleted the "CMakeCache.txt" after trying again, bit it did not help. I am using the newest Builds of opencv and opencv_contrib from githup today.