<p dir="auto">Very cool but when I building OpenCV from Source Using CMake, it not works. look forward to your reply! Thank you<br>
System information (version)</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="OpenCV =&gt; 3.4.3
Operating System / Platform =&gt; ubuntu16.04 64 Bit
Compiler =&gt; cmake"><pre class="notranslate"><code class="notranslate">OpenCV =&gt; 3.4.3
Operating System / Platform =&gt; ubuntu16.04 64 Bit
Compiler =&gt; cmake
</code></pre></div>
<p dir="auto">Detailed description</p>
<p dir="auto">I download the opencv-3.4.3 and opencv_contrib-3.4.3,<br>
cd ~/opencv<br>
mkdir build<br>
cd build<br>
and i cmake as follows</p>
<p dir="auto">(base) lirui@lirui:~/cplusplus/opencv-3.4.3/build$ cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/home/lirui/cplusplus/opencv-3.4.3_install -D OPENCV_EXTRA_MODULES_PATH=/home/lirui/cplusplus/opencv_contrib-3.4.3/modules ..<br>
-- The CXX compiler identification is GNU 5.4.0<br>
-- The C compiler identification is GNU 5.4.0<br>
-- Check for working CXX compiler: /usr/bin/c++<br>
-- Check for working CXX compiler: /usr/bin/c++ -- works<br>
-- Detecting CXX compiler ABI info<br>
-- Detecting CXX compiler ABI info - done<br>
-- Detecting CXX compile features<br>
-- Detecting CXX compile features - done<br>
-- Check for working C compiler: /usr/bin/cc<br>
-- Check for working C compiler: /usr/bin/cc -- works<br>
-- Detecting C compiler ABI info<br>
-- Detecting C compiler ABI info - done<br>
-- Detecting C compile features<br>
-- Detecting C compile features - done<br>
-- Performing Test HAVE_CXX11 (check file: cmake/checks/cxx11.cpp)<br>
-- Performing Test HAVE_CXX11 - Failed<br>
-- Found PythonInterp: /usr/bin/python2.7 (found suitable version "2.7.12", minimum required is "2.7")<br>
-- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython2.7.so (found suitable exact version "2.7.12")<br>
-- Found PythonInterp: /home/lirui/anaconda3/bin/python3 (found suitable version "3.7.6", minimum required is "3.4")<br>
-- Could NOT find PythonLibs (missing: PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS) (Required is exact version "3.7.6")<br>
-- Looking for ccache - not found<br>
-- Performing Test HAVE_CXX_FSIGNED_CHAR<br>
-- Performing Test HAVE_CXX_FSIGNED_CHAR - Success<br>
-- Performing Test HAVE_C_FSIGNED_CHAR<br>
-- Performing Test HAVE_C_FSIGNED_CHAR - Success<br>
-- Performing Test HAVE_CXX_W<br>
-- Performing Test HAVE_CXX_W - Success<br>
-- Performing Test HAVE_C_W<br>
-- Performing Test HAVE_C_W - Success<br>
-- Performing Test HAVE_CXX_WALL<br>
-- Performing Test HAVE_CXX_WALL - Success<br>
-- Performing Test HAVE_C_WALL<br>
-- Performing Test HAVE_C_WALL - Success<br>
-- Performing Test HAVE_CXX_WERROR_RETURN_TYPE<br>
-- Performing Test HAVE_CXX_WERROR_RETURN_TYPE - Success<br>
-- Performing Test HAVE_C_WERROR_RETURN_TYPE<br>
-- Performing Test HAVE_C_WERROR_RETURN_TYPE - Success<br>
-- Performing Test HAVE_CXX_WERROR_NON_VIRTUAL_DTOR<br>
-- Performing Test HAVE_CXX_WERROR_NON_VIRTUAL_DTOR - Success<br>
-- Performing Test HAVE_C_WERROR_NON_VIRTUAL_DTOR<br>
-- Performing Test HAVE_C_WERROR_NON_VIRTUAL_DTOR - Success<br>
-- Performing Test HAVE_CXX_WERROR_ADDRESS<br>
-- Performing Test HAVE_CXX_WERROR_ADDRESS - Success<br>
-- Performing Test HAVE_C_WERROR_ADDRESS<br>
-- Performing Test HAVE_C_WERROR_ADDRESS - Success<br>
-- Performing Test HAVE_CXX_WERROR_SEQUENCE_POINT<br>
-- Performing Test HAVE_CXX_WERROR_SEQUENCE_POINT - Success<br>
-- Performing Test HAVE_C_WERROR_SEQUENCE_POINT<br>
-- Performing Test HAVE_C_WERROR_SEQUENCE_POINT - Success<br>
-- Performing Test HAVE_CXX_WFORMAT<br>
-- Performing Test HAVE_CXX_WFORMAT - Success<br>
-- Performing Test HAVE_C_WFORMAT<br>
-- Performing Test HAVE_C_WFORMAT - Success<br>
-- Performing Test HAVE_CXX_WERROR_FORMAT_SECURITY<br>
-- Performing Test HAVE_CXX_WERROR_FORMAT_SECURITY - Success<br>
-- Performing Test HAVE_C_WERROR_FORMAT_SECURITY<br>
-- Performing Test HAVE_C_WERROR_FORMAT_SECURITY - Success<br>
-- Performing Test HAVE_CXX_WMISSING_DECLARATIONS<br>
-- Performing Test HAVE_CXX_WMISSING_DECLARATIONS - Success<br>
-- Performing Test HAVE_C_WMISSING_DECLARATIONS<br>
-- Performing Test HAVE_C_WMISSING_DECLARATIONS - Success<br>
-- Performing Test HAVE_CXX_WMISSING_PROTOTYPES<br>
-- Performing Test HAVE_CXX_WMISSING_PROTOTYPES - Failed<br>
-- Performing Test HAVE_C_WMISSING_PROTOTYPES<br>
-- Performing Test HAVE_C_WMISSING_PROTOTYPES - Success<br>
-- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES<br>
-- Performing Test HAVE_CXX_WSTRICT_PROTOTYPES - Failed<br>
-- Performing Test HAVE_C_WSTRICT_PROTOTYPES<br>
-- Performing Test HAVE_C_WSTRICT_PROTOTYPES - Success<br>
-- Performing Test HAVE_CXX_WUNDEF<br>
-- Performing Test HAVE_CXX_WUNDEF - Success<br>
-- Performing Test HAVE_C_WUNDEF<br>
-- Performing Test HAVE_C_WUNDEF - Success<br>
-- Performing Test HAVE_CXX_WINIT_SELF<br>
-- Performing Test HAVE_CXX_WINIT_SELF - Success<br>
-- Performing Test HAVE_C_WINIT_SELF<br>
-- Performing Test HAVE_C_WINIT_SELF - Success<br>
-- Performing Test HAVE_CXX_WPOINTER_ARITH<br>
-- Performing Test HAVE_CXX_WPOINTER_ARITH - Success<br>
-- Performing Test HAVE_C_WPOINTER_ARITH<br>
-- Performing Test HAVE_C_WPOINTER_ARITH - Success<br>
-- Performing Test HAVE_CXX_WSHADOW<br>
-- Performing Test HAVE_CXX_WSHADOW - Success<br>
-- Performing Test HAVE_C_WSHADOW<br>
-- Performing Test HAVE_C_WSHADOW - Success<br>
-- Performing Test HAVE_CXX_WSIGN_PROMO<br>
-- Performing Test HAVE_CXX_WSIGN_PROMO - Success<br>
-- Performing Test HAVE_C_WSIGN_PROMO<br>
-- Performing Test HAVE_C_WSIGN_PROMO - Failed<br>
-- Performing Test HAVE_CXX_WUNINITIALIZED<br>
-- Performing Test HAVE_CXX_WUNINITIALIZED - Success<br>
-- Performing Test HAVE_C_WUNINITIALIZED<br>
-- Performing Test HAVE_C_WUNINITIALIZED - Success<br>
-- Performing Test HAVE_CXX_WNO_NARROWING<br>
-- Performing Test HAVE_CXX_WNO_NARROWING - Success<br>
-- Performing Test HAVE_C_WNO_NARROWING<br>
-- Performing Test HAVE_C_WNO_NARROWING - Success<br>
-- Performing Test HAVE_CXX_WNO_DELETE_NON_VIRTUAL_DTOR<br>
-- Performing Test HAVE_CXX_WNO_DELETE_NON_VIRTUAL_DTOR - Success<br>
-- Performing Test HAVE_C_WNO_DELETE_NON_VIRTUAL_DTOR<br>
-- Performing Test HAVE_C_WNO_DELETE_NON_VIRTUAL_DTOR - Failed<br>
-- Performing Test HAVE_CXX_WNO_UNNAMED_TYPE_TEMPLATE_ARGS<br>
-- Performing Test HAVE_CXX_WNO_UNNAMED_TYPE_TEMPLATE_ARGS - Failed<br>
-- Performing Test HAVE_C_WNO_UNNAMED_TYPE_TEMPLATE_ARGS<br>
-- Performing Test HAVE_C_WNO_UNNAMED_TYPE_TEMPLATE_ARGS - Failed<br>
-- Performing Test HAVE_CXX_WNO_COMMENT<br>
-- Performing Test HAVE_CXX_WNO_COMMENT - Success<br>
-- Performing Test HAVE_C_WNO_COMMENT<br>
-- Performing Test HAVE_C_WNO_COMMENT - Success<br>
-- Performing Test HAVE_CXX_FDIAGNOSTICS_SHOW_OPTION<br>
-- Performing Test HAVE_CXX_FDIAGNOSTICS_SHOW_OPTION - Success<br>
-- Performing Test HAVE_C_FDIAGNOSTICS_SHOW_OPTION<br>
-- Performing Test HAVE_C_FDIAGNOSTICS_SHOW_OPTION - Success<br>
-- Performing Test HAVE_CXX_WNO_LONG_LONG<br>
-- Performing Test HAVE_CXX_WNO_LONG_LONG - Success<br>
-- Performing Test HAVE_C_WNO_LONG_LONG<br>
-- Performing Test HAVE_C_WNO_LONG_LONG - Success<br>
-- Performing Test HAVE_CXX_PTHREAD<br>
-- Performing Test HAVE_CXX_PTHREAD - Success<br>
-- Performing Test HAVE_C_PTHREAD<br>
-- Performing Test HAVE_C_PTHREAD - Success<br>
-- Performing Test HAVE_CXX_FOMIT_FRAME_POINTER<br>
-- Performing Test HAVE_CXX_FOMIT_FRAME_POINTER - Success<br>
-- Performing Test HAVE_C_FOMIT_FRAME_POINTER<br>
-- Performing Test HAVE_C_FOMIT_FRAME_POINTER - Success<br>
-- Performing Test HAVE_CXX_FFUNCTION_SECTIONS<br>
-- Performing Test HAVE_CXX_FFUNCTION_SECTIONS - Success<br>
-- Performing Test HAVE_C_FFUNCTION_SECTIONS<br>
-- Performing Test HAVE_C_FFUNCTION_SECTIONS - Success<br>
-- Performing Test HAVE_CXX_FDATA_SECTIONS<br>
-- Performing Test HAVE_CXX_FDATA_SECTIONS - Success<br>
-- Performing Test HAVE_C_FDATA_SECTIONS<br>
-- Performing Test HAVE_C_FDATA_SECTIONS - Success<br>
-- Performing Test HAVE_CXX_MSSE (check file: cmake/checks/cpu_sse.cpp)<br>
-- Performing Test HAVE_CXX_MSSE - Success<br>
-- Performing Test HAVE_CXX_MSSE2 (check file: cmake/checks/cpu_sse2.cpp)<br>
-- Performing Test HAVE_CXX_MSSE2 - Success<br>
-- Performing Test HAVE_CXX_MSSE3 (check file: cmake/checks/cpu_sse3.cpp)<br>
-- Performing Test HAVE_CXX_MSSE3 - Success<br>
-- Performing Test HAVE_CXX_MSSSE3 (check file: cmake/checks/cpu_ssse3.cpp)<br>
-- Performing Test HAVE_CXX_MSSSE3 - Success<br>
-- Performing Test HAVE_CXX_MSSE4_1 (check file: cmake/checks/cpu_sse41.cpp)<br>
-- Performing Test HAVE_CXX_MSSE4_1 - Success<br>
-- Performing Test HAVE_CXX_MPOPCNT (check file: cmake/checks/cpu_popcnt.cpp)<br>
-- Performing Test HAVE_CXX_MPOPCNT - Success<br>
-- Performing Test HAVE_CXX_MSSE4_2 (check file: cmake/checks/cpu_sse42.cpp)<br>
-- Performing Test HAVE_CXX_MSSE4_2 - Success<br>
-- Performing Test HAVE_CXX_MF16C (check file: cmake/checks/cpu_fp16.cpp)<br>
-- Performing Test HAVE_CXX_MF16C - Success<br>
-- Performing Test HAVE_CXX_MFMA<br>
-- Performing Test HAVE_CXX_MFMA - Success<br>
-- Performing Test HAVE_CXX_MAVX (check file: cmake/checks/cpu_avx.cpp)<br>
-- Performing Test HAVE_CXX_MAVX - Success<br>
-- Performing Test HAVE_CXX_MAVX2 (check file: cmake/checks/cpu_avx2.cpp)<br>
-- Performing Test HAVE_CXX_MAVX2 - Success<br>
-- Performing Test HAVE_CXX_MAVX512F (check file: cmake/checks/cpu_avx512.cpp)<br>
-- Performing Test HAVE_CXX_MAVX512F - Success<br>
-- Performing Test HAVE_CXX_MAVX512F_MAVX512CD_MAVX512VL_MAVX512BW_MAVX512DQ (check file: cmake/checks/cpu_avx512skx.cpp)<br>
-- Performing Test HAVE_CXX_MAVX512F_MAVX512CD_MAVX512VL_MAVX512BW_MAVX512DQ - Success<br>
-- Performing Test HAVE_CPU_BASELINE_FLAGS<br>
-- Performing Test HAVE_CPU_BASELINE_FLAGS - Success<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_1<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_1 - Success<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_2<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_2 - Success<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_FP16<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_FP16 - Success<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX - Success<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX2<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX2 - Success<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX512_SKX<br>
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX512_SKX - Success<br>
-- Performing Test HAVE_CXX_FVISIBILITY_HIDDEN<br>
-- Performing Test HAVE_CXX_FVISIBILITY_HIDDEN - Success<br>
-- Performing Test HAVE_C_FVISIBILITY_HIDDEN<br>
-- Performing Test HAVE_C_FVISIBILITY_HIDDEN - Success<br>
-- Performing Test HAVE_CXX_FVISIBILITY_INLINES_HIDDEN<br>
-- Performing Test HAVE_CXX_FVISIBILITY_INLINES_HIDDEN - Success<br>
-- Performing Test HAVE_C_FVISIBILITY_INLINES_HIDDEN<br>
-- Performing Test HAVE_C_FVISIBILITY_INLINES_HIDDEN - Failed<br>
-- Looking for pthread.h<br>
-- Looking for pthread.h - found<br>
-- Looking for posix_memalign<br>
-- Looking for posix_memalign - found<br>
-- Looking for malloc.h<br>
-- Looking for malloc.h - found<br>
-- Looking for memalign<br>
-- Looking for memalign - found<br>
-- Check if the system is big endian<br>
-- Searching 16 bit integer<br>
-- Looking for sys/types.h<br>
-- Looking for sys/types.h - found<br>
-- Looking for stdint.h<br>
-- Looking for stdint.h - found<br>
-- Looking for stddef.h<br>
-- Looking for stddef.h - found<br>
-- Check size of unsigned short<br>
-- Check size of unsigned short - done<br>
-- Using unsigned short<br>
-- Check if the system is big endian - little endian<br>
-- Found ZLIB: /home/lirui/anaconda3/lib/libz.so (found suitable version "1.2.11", minimum required is "1.2.3")<br>
-- Found JPEG: /home/lirui/anaconda3/lib/libjpeg.so<br>
-- Found TIFF: /home/lirui/anaconda3/lib/libtiff.so (found version "4.1.0")<br>
-- Performing Test HAVE_C_WNO_UNUSED_VARIABLE<br>
-- Performing Test HAVE_C_WNO_UNUSED_VARIABLE - Success<br>
-- Performing Test HAVE_C_WNO_UNUSED_FUNCTION<br>
-- Performing Test HAVE_C_WNO_UNUSED_FUNCTION - Success<br>
-- Performing Test HAVE_C_WNO_SHADOW<br>
-- Performing Test HAVE_C_WNO_SHADOW - Success<br>
-- Performing Test HAVE_C_WNO_MAYBE_UNINITIALIZED<br>
-- Performing Test HAVE_C_WNO_MAYBE_UNINITIALIZED - Success<br>
-- Performing Test HAVE_C_WNO_MISSING_PROTOTYPES<br>
-- Performing Test HAVE_C_WNO_MISSING_PROTOTYPES - Success<br>
-- Performing Test HAVE_C_WNO_MISSING_DECLARATIONS<br>
-- Performing Test HAVE_C_WNO_MISSING_DECLARATIONS - Success<br>
-- Performing Test HAVE_C_WNO_IMPLICIT_FALLTHROUGH<br>
-- Performing Test HAVE_C_WNO_IMPLICIT_FALLTHROUGH - Failed<br>
-- Found Jasper: /usr/lib/x86_64-linux-gnu/libjasper.so (found version "1.900.1")<br>
-- Found ZLIB: /home/lirui/anaconda3/lib/libz.so (found version "1.2.11")<br>
-- Found PNG: /home/lirui/anaconda3/lib/libpng.so (found version "1.6.37")<br>
-- Looking for /home/lirui/anaconda3/include/libpng/png.h<br>
-- Looking for /home/lirui/anaconda3/include/libpng/png.h - not found<br>
-- Looking for semaphore.h<br>
-- Looking for semaphore.h - found<br>
-- Performing Test HAVE_CXX_WNO_SHADOW<br>
-- Performing Test HAVE_CXX_WNO_SHADOW - Success<br>
-- Performing Test HAVE_CXX_WNO_UNUSED<br>
-- Performing Test HAVE_CXX_WNO_UNUSED - Success<br>
-- Performing Test HAVE_CXX_WNO_SIGN_COMPARE<br>
-- Performing Test HAVE_CXX_WNO_SIGN_COMPARE - Success<br>
-- Performing Test HAVE_CXX_WNO_UNDEF<br>
-- Performing Test HAVE_CXX_WNO_UNDEF - Success<br>
-- Performing Test HAVE_CXX_WNO_MISSING_DECLARATIONS<br>
-- Performing Test HAVE_CXX_WNO_MISSING_DECLARATIONS - Success<br>
-- Performing Test HAVE_CXX_WNO_UNINITIALIZED<br>
-- Performing Test HAVE_CXX_WNO_UNINITIALIZED - Success<br>
-- Performing Test HAVE_CXX_WNO_SWITCH<br>
-- Performing Test HAVE_CXX_WNO_SWITCH - Success<br>
-- Performing Test HAVE_CXX_WNO_PARENTHESES<br>
-- Performing Test HAVE_CXX_WNO_PARENTHESES - Success<br>
-- Performing Test HAVE_CXX_WNO_ARRAY_BOUNDS<br>
-- Performing Test HAVE_CXX_WNO_ARRAY_BOUNDS - Success<br>
-- Performing Test HAVE_CXX_WNO_EXTRA<br>
-- Performing Test HAVE_CXX_WNO_EXTRA - Success<br>
-- Performing Test HAVE_CXX_WNO_DEPRECATED_DECLARATIONS<br>
-- Performing Test HAVE_CXX_WNO_DEPRECATED_DECLARATIONS - Success<br>
-- Performing Test HAVE_CXX_WNO_MISLEADING_INDENTATION<br>
-- Performing Test HAVE_CXX_WNO_MISLEADING_INDENTATION - Failed<br>
-- Performing Test HAVE_CXX_WNO_DEPRECATED<br>
-- Performing Test HAVE_CXX_WNO_DEPRECATED - Success<br>
-- Performing Test HAVE_CXX_WNO_SUGGEST_OVERRIDE<br>
-- Performing Test HAVE_CXX_WNO_SUGGEST_OVERRIDE - Success<br>
-- Performing Test HAVE_CXX_WNO_INCONSISTENT_MISSING_OVERRIDE<br>
-- Performing Test HAVE_CXX_WNO_INCONSISTENT_MISSING_OVERRIDE - Failed<br>
-- Performing Test HAVE_CXX_WNO_IMPLICIT_FALLTHROUGH<br>
-- Performing Test HAVE_CXX_WNO_IMPLICIT_FALLTHROUGH - Failed<br>
-- Checking for module 'gtk+-3.0'<br>
-- Found gtk+-3.0, version 3.18.9<br>
-- Checking for module 'gthread-2.0'<br>
-- Found gthread-2.0, version 2.48.2<br>
-- Checking for module 'gstreamer-base-1.0'<br>
-- No package 'gstreamer-base-1.0' found<br>
-- Checking for module 'gstreamer-video-1.0'<br>
-- No package 'gstreamer-video-1.0' found<br>
-- Checking for module 'gstreamer-app-1.0'<br>
-- No package 'gstreamer-app-1.0' found<br>
-- Checking for module 'gstreamer-riff-1.0'<br>
-- No package 'gstreamer-riff-1.0' found<br>
-- Checking for module 'gstreamer-pbutils-1.0'<br>
-- No package 'gstreamer-pbutils-1.0' found<br>
-- Checking for module 'gstreamer-base-0.10'<br>
-- No package 'gstreamer-base-0.10' found<br>
-- Checking for module 'gstreamer-video-0.10'<br>
-- No package 'gstreamer-video-0.10' found<br>
-- Checking for module 'gstreamer-app-0.10'<br>
-- No package 'gstreamer-app-0.10' found<br>
-- Checking for module 'gstreamer-riff-0.10'<br>
-- No package 'gstreamer-riff-0.10' found<br>
-- Checking for module 'gstreamer-pbutils-0.10'<br>
-- No package 'gstreamer-pbutils-0.10' found<br>
-- Checking for module 'libdc1394-2'<br>
-- Found libdc1394-2, version 2.2.4<br>
-- Looking for linux/videodev.h<br>
-- Looking for linux/videodev.h - not found<br>
-- Looking for linux/videodev2.h<br>
-- Looking for linux/videodev2.h - found<br>
-- Looking for sys/videoio.h<br>
-- Looking for sys/videoio.h - not found<br>
-- Checking for modules 'libavcodec;libavformat;libavutil;libswscale'<br>
-- Found libavcodec, version 56.60.100<br>
-- Found libavformat, version 56.40.101<br>
-- Found libavutil, version 54.31.100<br>
-- Found libswscale, version 3.1.101<br>
-- Checking for module 'libavresample'<br>
-- No package 'libavresample' found<br>
-- IPPICV: Download: ippicv_2017u3_lnx_intel64_general_20180518.tgz<br>
-- found Intel IPP (ICV version): 2017.0.3 [2017.0.3]<br>
-- at: /home/lirui/cplusplus/opencv-3.4.3/build/3rdparty/ippicv/ippicv_lnx<br>
-- found Intel IPP IW sources: 2017.0.3<br>
-- at: /home/lirui/cplusplus/opencv-3.4.3/build/3rdparty/ippicv/ippiw_lnx<br>
-- Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off<br>
-- Could NOT find Atlas (missing: Atlas_CLAPACK_INCLUDE_DIR)<br>
-- Looking for dgemm_<br>
-- Looking for dgemm_ - found<br>
-- Looking for pthread.h<br>
-- Looking for pthread.h - found<br>
-- Looking for pthread_create<br>
-- Looking for pthread_create - found<br>
-- Found Threads: TRUE<br>
-- A library with BLAS API found.<br>
-- Looking for cheev_<br>
-- Looking for cheev_ - found<br>
-- A library with LAPACK API found.<br>
-- Performing Test HAVE_CXX_WNO_MISSING_PROTOTYPES<br>
-- Performing Test HAVE_CXX_WNO_MISSING_PROTOTYPES - Failed<br>
-- Performing Test HAVE_CXX_WNO_UNUSED_PARAMETER<br>
-- Performing Test HAVE_CXX_WNO_UNUSED_PARAMETER - Success<br>
-- Performing Test HAVE_CXX_WNO_UNUSED_LOCAL_TYPEDEFS<br>
-- Performing Test HAVE_CXX_WNO_UNUSED_LOCAL_TYPEDEFS - Success<br>
-- Performing Test HAVE_CXX_WNO_SIGN_PROMO<br>
-- Performing Test HAVE_CXX_WNO_SIGN_PROMO - Success<br>
-- Performing Test HAVE_CXX_WNO_TAUTOLOGICAL_UNDEFINED_COMPARE<br>
-- Performing Test HAVE_CXX_WNO_TAUTOLOGICAL_UNDEFINED_COMPARE - Failed<br>
-- Performing Test HAVE_CXX_WNO_IGNORED_QUALIFIERS<br>
-- Performing Test HAVE_CXX_WNO_IGNORED_QUALIFIERS - Success<br>
-- Performing Test HAVE_CXX_WNO_UNUSED_FUNCTION<br>
-- Performing Test HAVE_CXX_WNO_UNUSED_FUNCTION - Success<br>
-- Performing Test HAVE_CXX_WNO_UNUSED_CONST_VARIABLE<br>
-- Performing Test HAVE_CXX_WNO_UNUSED_CONST_VARIABLE - Failed<br>
-- Performing Test HAVE_CXX_WNO_SHORTEN_64_TO_32<br>
-- Performing Test HAVE_CXX_WNO_SHORTEN_64_TO_32 - Failed<br>
-- Performing Test HAVE_CXX_WNO_INVALID_OFFSETOF<br>
-- Performing Test HAVE_CXX_WNO_INVALID_OFFSETOF - Success<br>
-- Performing Test HAVE_CXX_WNO_ENUM_COMPARE_SWITCH<br>
-- Performing Test HAVE_CXX_WNO_ENUM_COMPARE_SWITCH - Failed<br>
-- Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH)<br>
-- Found Matlab: /usr/local/MATLAB/R2019a/bin/mex<br>
-- Found VTK 8.2.0 (/usr/local/lib/cmake/vtk-8.2/UseVTK.cmake)<br>
-- Looking for dlerror in dl<br>
-- Looking for dlerror in dl - found<br>
-- Performing Test HAVE_C_WNO_UNDEF<br>
-- Performing Test HAVE_C_WNO_UNDEF - Success<br>
-- Performing Test HAVE_C_WNO_SIGN_COMPARE<br>
-- Performing Test HAVE_C_WNO_SIGN_COMPARE - Success<br>
-- Checking for one of the modules 'freetype2'<br>
-- Checking for one of the modules 'harfbuzz'<br>
-- freetype2: YES<br>
-- harfbuzz: YES<br>
Traceback (most recent call last):<br>
File "", line 1, in<br>
ImportError: No module named jinja2<br>
CMake Warning at /home/lirui/cplusplus/opencv_contrib-3.4.3/modules/matlab/CMakeLists.txt:54 (message):<br>
A required dependency of the matlab module (Python Jinja2 package) was not<br>
found (installation command: "pip install jinja2"). Disabling Matlab<br>
bindings...<br>
-- Module opencv_ovis disabled because OGRE3D was not found<br>
-- Found HDF5: /home/lirui/anaconda3/lib/libhdf5.so;/usr/lib/x86_64-linux-gnu/librt.so;/usr/lib/x86_64-linux-gnu/libpthread.so;/home/lirui/anaconda3/lib/libz.so;/usr/lib/x86_64-linux-gnu/libdl.so;/usr/lib/x86_64-linux-gnu/libm.so (found version "1.10.2")<br>
-- No preference for use of exported gflags CMake configuration set, and no hints for include/library directories provided. Defaulting to preferring an installed/exported gflags CMake configuration if available.<br>
-- Failed to find installed gflags CMake configuration, searching for gflags build directories exported with CMake.<br>
-- Failed to find gflags - Failed to find an installed/exported CMake configuration for gflags, will perform search for installed gflags components.<br>
-- Failed to find gflags - Could not find gflags include directory, set GFLAGS_INCLUDE_DIR to directory containing gflags/gflags.h<br>
-- Failed to find glog - Could not find glog include directory, set GLOG_INCLUDE_DIR to directory containing glog/logging.h<br>
-- Module opencv_sfm disabled because the following dependencies are not found: Glog/Gflags<br>
-- Caffe: NO<br>
-- Protobuf: NO<br>
-- Glog: NO<br>
-- Performing Test HAVE_CXX_WNO_MAYBE_UNINITIALIZED<br>
-- Performing Test HAVE_CXX_WNO_MAYBE_UNINITIALIZED - Success<br>
-- Performing Test HAVE_CXX_WNO_ERROR_NON_VIRTUAL_DTOR<br>
-- Performing Test HAVE_CXX_WNO_ERROR_NON_VIRTUAL_DTOR - Success<br>
-- Performing Test HAVE_CXX_WNO_ENUM_COMPARE<br>
-- Performing Test HAVE_CXX_WNO_ENUM_COMPARE - Success<br>
-- data: Download: face_landmark_model.dat<br>
-- freetype2: YES<br>
-- harfbuzz: YES<br>
-- Performing Test HAVE_CXX_WNO_OVERLOADED_VIRTUAL<br>
-- Performing Test HAVE_CXX_WNO_OVERLOADED_VIRTUAL - Success<br>
-- Checking for modules 'tesseract;lept'<br>
-- No package 'tesseract' found<br>
-- No package 'lept' found<br>
-- Tesseract: NO<br>
-- xfeatures2d/boostdesc: Download: boostdesc_bgm.i<br>
-- xfeatures2d/boostdesc: Download: boostdesc_bgm_bi.i<br>
-- xfeatures2d/boostdesc: Download: boostdesc_bgm_hd.i<br>
-- xfeatures2d/boostdesc: Download: boostdesc_binboost_064.i<br>
-- xfeatures2d/boostdesc: Download: boostdesc_binboost_128.i<br>
-- xfeatures2d/boostdesc: Download: boostdesc_binboost_256.i<br>
-- xfeatures2d/boostdesc: Download: boostdesc_lbgm.i<br>
-- xfeatures2d/vgg: Download: vgg_generated_48.i<br>
-- xfeatures2d/vgg: Download: vgg_generated_64.i<br>
-- xfeatures2d/vgg: Download: vgg_generated_80.i<br>
-- xfeatures2d/vgg: Download: vgg_generated_120.i<br>
-- Performing Test HAVE_CXX_WNO_UNUSED_PRIVATE_FIELD<br>
-- Performing Test HAVE_CXX_WNO_UNUSED_PRIVATE_FIELD - Failed<br>
-- General configuration for OpenCV 3.4.3 =====================================<br>
-- Version control: unknown<br>
-- Extra modules:<br>
-- Location (extra): /home/lirui/cplusplus/opencv_contrib-3.4.3/modules<br>
-- Version control (extra): unknown<br>
-- Platform:<br>
-- Timestamp: 2020-05-10T06:38:59Z<br>
-- Host: Linux 4.15.0-99-generic x86_64<br>
-- CMake: 3.5.1<br>
-- CMake generator: Unix Makefiles<br>
-- CMake build tool: /usr/bin/make<br>
-- Configuration: Release<br>
-- CPU/HW features:<br>
-- Baseline: SSE SSE2 SSE3<br>
-- requested: SSE3<br>
-- Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX<br>
-- requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX<br>
-- SSE4_1 (5 files): + SSSE3 SSE4_1<br>
-- SSE4_2 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2<br>
-- FP16 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX<br>
-- AVX (6 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX<br>
-- AVX2 (11 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2<br>
-- AVX512_SKX (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_SKX<br>
-- C/C++:<br>
-- Built as dynamic libs?: YES<br>
-- C++ Compiler: /usr/bin/c++ (ver 5.4.0)<br>
-- 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 -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -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<br>
-- 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 -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -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<br>
-- C Compiler: /usr/bin/cc<br>
-- 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-narrowing -Wno-comment -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG<br>
-- 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-narrowing -Wno-comment -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG<br>
-- Linker flags (Release):<br>
-- Linker flags (Debug):<br>
-- ccache: NO<br>
-- Precompiled headers: YES<br>
-- Extra dependencies: dl m pthread rt<br>
-- 3rdparty dependencies:<br>
-- OpenCV modules:<br>
-- To be built: aruco bgsegm bioinspired calib3d ccalib core datasets dnn dnn_objdetect dpm face features2d flann freetype fuzzy hdf hfs highgui img_hash imgcodecs imgproc java_bindings_generator line_descriptor ml objdetect optflow phase_unwrapping photo plot python2 python_bindings_generator reg rgbd saliency shape stereo stitching structured_light superres surface_matching text tracking ts video videoio videostab viz xfeatures2d ximgproc xobjdetect xphoto<br>
-- Disabled: js world<br>
-- Disabled by dependency: -<br>
-- Unavailable: cnn_3dobj cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev cvv java matlab ovis python3 sfm<br>
-- Applications: tests perf_tests apps<br>
-- Documentation: NO<br>
-- Non-free algorithms: NO<br>
-- GUI:<br>
-- GTK+: YES (ver 3.18.9)<br>
-- GThread : YES (ver 2.48.2)<br>
-- GtkGlExt: NO<br>
-- VTK support: YES (ver 8.2.0)<br>
-- Media I/O:<br>
-- ZLib: /home/lirui/anaconda3/lib/libz.so (ver 1.2.11)<br>
-- JPEG: /home/lirui/anaconda3/lib/libjpeg.so (ver 90)<br>
-- WEBP: build (ver encoder: 0x020e)<br>
-- PNG: /home/lirui/anaconda3/lib/libpng.so (ver 1.6.37)<br>
-- TIFF: /home/lirui/anaconda3/lib/libtiff.so (ver 42 / 4.1.0)<br>
-- JPEG 2000: /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)<br>
-- OpenEXR: build (ver 1.7.1)<br>
-- HDR: YES<br>
-- SUNRASTER: YES<br>
-- PXM: YES<br>
-- Video I/O:<br>
-- DC1394: YES (ver 2.2.4)<br>
-- FFMPEG: YES<br>
-- avcodec: YES (ver 56.60.100)<br>
-- avformat: YES (ver 56.40.101)<br>
-- avutil: YES (ver 54.31.100)<br>
-- swscale: YES (ver 3.1.101)<br>
-- avresample: NO<br>
-- GStreamer: NO<br>
-- libv4l/libv4l2: NO<br>
-- v4l/v4l2: linux/videodev2.h<br>
-- Parallel framework: pthreads<br>
-- Trace: YES (with Intel ITT)<br>
-- Other third-party libraries:<br>
-- Intel IPP: 2017.0.3 [2017.0.3]<br>
-- at: /home/lirui/cplusplus/opencv-3.4.3/build/3rdparty/ippicv/ippicv_lnx<br>
-- Intel IPP IW: sources (2017.0.3)<br>
-- at: /home/lirui/cplusplus/opencv-3.4.3/build/3rdparty/ippicv/ippiw_lnx<br>
-- Lapack: NO<br>
-- Eigen: YES (ver 3.2.92)<br>
-- Custom HAL: NO<br>
-- Protobuf: build (3.5.1)<br>
-- OpenCL: YES (no extra features)<br>
-- Include path: /home/lirui/cplusplus/opencv-3.4.3/3rdparty/include/opencl/1.2<br>
-- Link libraries: Dynamic load<br>
-- Python 2:<br>
-- Interpreter: /usr/bin/python2.7 (ver 2.7.12)<br>
-- Libraries: /usr/lib/x86_64-linux-gnu/libpython2.7.so (ver 2.7.12)<br>
-- numpy: /usr/local/lib/python2.7/dist-packages/numpy/core/include (ver 1.16.2)<br>
-- packages path: lib/python2.7/dist-packages<br>
-- Python (for build): /usr/bin/python2.7<br>
-- Java:<br>
-- ant: NO<br>
-- JNI: NO<br>
-- Java wrappers: NO<br>
-- Java tests: NO<br>
-- Matlab: YES<br>
-- mex: /usr/local/MATLAB/R2019a/bin/mex<br>
-- Compiler/generator: Not working (bindings will not be generated)</p>
<p dir="auto">-- Install to: /home/lirui/cplusplus/opencv-3.4.3_install</p>
<p dir="auto">--<br>
-- Configuring done<br>
-- Generating done<br>
-- Build files have been written to: /home/lirui/cplusplus/opencv-3.4.3/build<br>
and i make but error</p>
<p dir="auto">(base) lirui@lirui:~/cplusplus/opencv-3.4.3/build$ make<br>
Scanning dependencies of target gen-pkgconfig<br>
[ 0%] Generate opencv.pc<br>
[ 0%] Built target gen-pkgconfig<br>
Scanning dependencies of target libwebp<br>
[ 0%] Building C object 3rdparty/libwebp/CMakeFiles/libwebp.dir/src/dec/tree_dec.c.o<br>
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[ 0%] Building C object 3rdparty/libwebp/CMakeFiles/libwebp.dir/src/dec/buffer_dec.c.o<br>
[ 0%] Building C object 3rdparty/libwebp/CMakeFiles/libwebp.dir/src/dec/io_dec.c.o<br>
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[ 0%] Building C object 3rdparty/libwebp/CMakeFiles/libwebp.dir/src/dec/frame_dec.c.o<br>
[ 0%] Building C object 3rdparty/libwebp/CMakeFiles/libwebp.dir/src/dec/idec_dec.c.o<br>
[ 0%] Building C object 3rdparty/libwebp/CMakeFiles/libwebp.dir/src/dec/webp_dec.c.o<br>
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[ 1%] Building C object 3rdparty/libwebp/CMakeFiles/libwebp.dir/src/dsp/cost_mips32.c.o<br>
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Scanning dependencies of target pch_Generate_opencv_core<br>
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Scanning dependencies of target pch_Generate_opencv_ts<br>
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Scanning dependencies of target pch_Generate_opencv_imgproc<br>
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Scanning dependencies of target pch_Generate_opencv_imgcodecs<br>
[ 21%] Generating precomp.hpp<br>
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/usr/bin/ld: warning: libzstd.so.1.3.7, needed by //home/lirui/anaconda3/lib/libtiff.so.5, not found (try using -rpath or -rpath-link)<br>
//home/lirui/anaconda3/lib/libtiff.so.5：对‘ZSTD_initCStream’未定义的引用<br>
//home/lirui/anaconda3/lib/libtiff.so.5：对‘ZSTD_freeCStream’未定义的引用<br>
//home/lirui/anaconda3/lib/libtiff.so.5：对‘ZSTD_maxCLevel’未定义的引用<br>
//home/lirui/anaconda3/lib/libtiff.so.5：对‘ZSTD_createCStream’未定义的引用<br>
//home/lirui/anaconda3/lib/libtiff.so.5：对‘ZSTD_isError’未定义的引用<br>
//home/lirui/anaconda3/lib/libtiff.so.5：对‘ZSTD_getErrorName’未定义的引用<br>
//home/lirui/anaconda3/lib/libtiff.so.5：对‘ZSTD_endStream’未定义的引用<br>
//home/lirui/anaconda3/lib/libtiff.so.5：对‘ZSTD_createDStream’未定义的引用<br>
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collect2: error: ld returned 1 exit status<br>
modules/core/CMakeFiles/opencv_test_core.dir/build.make:1116: recipe for target 'bin/opencv_test_core' failed<br>
make[2]: *** [bin/opencv_test_core] Error 1<br>
CMakeFiles/Makefile2:2607: recipe for target 'modules/core/CMakeFiles/opencv_test_core.dir/all' failed<br>
make[1]: *** [modules/core/CMakeFiles/opencv_test_core.dir/all] Error 2<br>
Makefile:160: recipe for target 'all' failed<br>
make: *** [all] Error 2</p>
<p dir="auto">I've been trying to build OpenCV 4.1.2 under Linux, with compatibility/bindings for Anaconda Python 3.7.  I keep encountering problems arising from CMake's Generate process, where several libraries (including gstreamer) cannot be located.  This is presumably because Anaconda installs libraries that 'shadow' those that CMake is looking for.  The problems relating to the gstreamer libs also seem to be triggered by enabling the flag "WITH_QT", though I'm not sure of the connection.  Presumably this is a larger problem, related to shadowing of expected libraries in general.</p>
<p dir="auto">I've noticed that several others have experienced similar problems.  This seems like there should be a work-around, given the prevalence of Anaconda in neural net programming.</p>
<p dir="auto">Sample error messages:</p>
<p dir="auto">CMake Warning at cmake/OpenCVUtils.cmake:1471 (add_executable): Cannot generate a safe runtime search path for target opencv_test_videoio because files in some directories may conflict with libraries in implicit directories:</p>
<p dir="auto">runtime library [libgstbase-1.0.so.0] in /usr/lib/x86_64-linux-gnu may be hidden by files in:<br>
/opt/Anaconda/3.7/lib</p>
<p dir="auto">runtime library [libgstreamer-1.0.so.0] in /usr/lib/x86_64-linux-gnu may be hidden by files in:<br>
/opt/Anaconda/3.7/lib</p>
<p dir="auto">runtime library [libgobject-2.0.so.0] in /usr/lib/x86_64-linux-gnu may be hidden by files in:<br>
/opt/Anaconda/3.7/lib</p>
<p dir="auto">etc...</p>
<p dir="auto">Though CMake-Gui Generate flags these as 'warnings', subsequent attempts to compile code via make fail with a message about failing to build cudawarping libs.  While this sounds like the major show-stopper, I'm sure that it must be caused by interactions that are evident in the 'generate' messages above.  When WITH_QT is switched off, CMake-Gui generates with no errors, and make compiles with no errors.</p>