Error While Building OpenCV on Ubuntu

mmunson2 · May 9, 2021, 2:27am

Quick Summary

I am building the OpenCV library from source on Ubuntu
I am attempting to build with FFMPEG and GUI support
cmake is successful, and the output shows FFMPEG as enabled

However, when I make the library, it fails about halfway through with these errors:

  /usr/bin/ld: /lib/x86_64-linux-gnu/librsvg-2.so.2: undefined reference to `cairo_tag_end'
  /usr/bin/ld: /lib/x86_64-linux-gnu/librsvg-2.so.2: undefined reference to ` cairo_tag_begin' 
  /usr/bin/ld: /lib/x86_64-linux-gnu/librsvg-2.so.2: undefined reference to `cairo_font_options_get_variations'

There’s very limited Google results on this issue at the moment. From what I’ve seen it has to do with Cmake not using the correct version of libcairo or not loading it. I have attempted forcing it to load with LD_PRELOAD without success.

System Details

Operating System: Ubuntu 20.10
OpenCV Version - Main branch pulled 5/8/2021

(Let me know if you need anything else here, I can list package versions as necessary)

`cmake` Command:

cmake -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_OPENGL=ON -D WITH_VTK=ON -DWITH_FFMPEG=ON ../opencv-master

`cmake` Output

(base) matthew@mercy:~/dev/opencv_build$ cmake -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_OPENGL=ON -D WITH_VTK=ON -DWITH_FFMPEG=ON ../opencv-master
-- The CXX compiler identification is GNU 10.2.0
-- The C compiler identification is GNU 10.2.0
-- 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: x86_64
-- Found PythonInterp: /home/mercy/dev/anaconda3/bin/python (found suitable version "3.8.5", minimum required is "2.7") 
CMake Warning at cmake/OpenCVDetectPython.cmake:81 (message):
  CMake's 'find_host_package(PythonInterp 2.7)' found wrong Python version:

  PYTHON_EXECUTABLE=/home/mercy/dev/anaconda3/bin/python

  PYTHON_VERSION_STRING=3.8.5

  Consider providing the 'PYTHON2_EXECUTABLE' variable via CMake command line
  or environment variables

Call Stack (most recent call first):
  cmake/OpenCVDetectPython.cmake:271 (find_python)
  CMakeLists.txt:614 (include)


-- Could NOT find Python2 (missing: Python2_EXECUTABLE Interpreter) 
-- Found PythonInterp: /home/mercy/dev/anaconda3/bin/python3 (found suitable version "3.8.5", minimum required is "3.2") 
-- Could NOT find PythonLibs (missing: PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS) (Required is exact version "3.8.5")
-- 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 - Failed
-- 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_WNO_LONG_LONG
-- Performing Test HAVE_CXX_WNO_LONG_LONG - Success
-- Performing Test HAVE_C_WNO_LONG_LONG
-- Performing Test HAVE_C_WNO_LONG_LONG - 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_MSSE (check file: cmake/checks/cpu_sse.cpp)
-- Performing Test HAVE_CXX_MSSE - Success
-- Performing Test HAVE_CXX_MSSE2 (check file: cmake/checks/cpu_sse2.cpp)
-- Performing Test HAVE_CXX_MSSE2 - Success
-- Performing Test HAVE_CXX_MSSE3 (check file: cmake/checks/cpu_sse3.cpp)
-- Performing Test HAVE_CXX_MSSE3 - Success
-- Performing Test HAVE_CXX_MSSSE3 (check file: cmake/checks/cpu_ssse3.cpp)
-- Performing Test HAVE_CXX_MSSSE3 - Success
-- Performing Test HAVE_CXX_MSSE4_1 (check file: cmake/checks/cpu_sse41.cpp)
-- Performing Test HAVE_CXX_MSSE4_1 - Success
-- Performing Test HAVE_CXX_MPOPCNT (check file: cmake/checks/cpu_popcnt.cpp)
-- Performing Test HAVE_CXX_MPOPCNT - Success
-- Performing Test HAVE_CXX_MSSE4_2 (check file: cmake/checks/cpu_sse42.cpp)
-- Performing Test HAVE_CXX_MSSE4_2 - Success
-- Performing Test HAVE_CXX_MF16C (check file: cmake/checks/cpu_fp16.cpp)
-- Performing Test HAVE_CXX_MF16C - Success
-- Performing Test HAVE_CXX_MFMA
-- Performing Test HAVE_CXX_MFMA - Success
-- Performing Test HAVE_CXX_MAVX (check file: cmake/checks/cpu_avx.cpp)
-- Performing Test HAVE_CXX_MAVX - Success
-- Performing Test HAVE_CXX_MAVX2 (check file: cmake/checks/cpu_avx2.cpp)
-- Performing Test HAVE_CXX_MAVX2 - Success
-- Performing Test HAVE_CXX_MAVX512F (check file: cmake/checks/cpu_avx512.cpp)
-- Performing Test HAVE_CXX_MAVX512F - Success
-- Performing Test HAVE_CXX_MAVX512F_MAVX512CD (check file: cmake/checks/cpu_avx512common.cpp)
-- Performing Test HAVE_CXX_MAVX512F_MAVX512CD - Success
-- Performing Test HAVE_CXX_MAVX512F_MAVX512CD_MAVX512VL_MAVX512BW_MAVX512DQ (check file: cmake/checks/cpu_avx512skx.cpp)
-- Performing Test HAVE_CXX_MAVX512F_MAVX512CD_MAVX512VL_MAVX512BW_MAVX512DQ - Success
-- Performing Test HAVE_CPU_BASELINE_FLAGS
-- Performing Test HAVE_CPU_BASELINE_FLAGS - Success
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_1
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_1 - Success
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_2
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_SSE4_2 - Success
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_FP16
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_FP16 - Success
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX - Success
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX2
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX2 - Success
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX512_SKX
-- Performing Test HAVE_CPU_DISPATCH_FLAGS_AVX512_SKX - 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
-- Performing Test HAVE_LINK_AS_NEEDED
-- Performing Test HAVE_LINK_AS_NEEDED - Success
-- 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/x86_64-linux-gnu/libz.so (found suitable version "1.2.11", minimum required is "1.2.3") 
-- Could NOT find JPEG (missing: JPEG_LIBRARY JPEG_INCLUDE_DIR) 
-- Performing Test HAVE_C_WNO_UNUSED_PARAMETER
-- Performing Test HAVE_C_WNO_UNUSED_PARAMETER - Success
-- Performing Test HAVE_C_WNO_SIGN_COMPARE
-- Performing Test HAVE_C_WNO_SIGN_COMPARE - Success
-- Performing Test HAVE_C_WNO_SHORTEN_64_TO_32
-- Performing Test HAVE_C_WNO_SHORTEN_64_TO_32 - Failed
-- Performing Test HAVE_C_WNO_IMPLICIT_FALLTHROUGH
-- Performing Test HAVE_C_WNO_IMPLICIT_FALLTHROUGH - Success
-- libjpeg-turbo: VERSION = 2.0.6, BUILD = opencv-4.5.2-dev-libjpeg-turbo
-- Check size of size_t
-- Check size of size_t - done
-- Check size of unsigned long
-- Check size of unsigned long - done
-- Performing Test HAVE_BUILTIN_CTZL
-- Performing Test HAVE_BUILTIN_CTZL - Success
-- Looking for include file locale.h
-- Looking for include file locale.h - found
-- Looking for include file stdlib.h
-- Looking for include file stdlib.h - found
-- Looking for include file sys/types.h
-- Looking for include file sys/types.h - found
-- Could NOT find TIFF (missing: TIFF_LIBRARY TIFF_INCLUDE_DIR) 
-- Looking for assert.h
-- Looking for assert.h - found
-- Looking for dlfcn.h
-- Looking for dlfcn.h - found
-- Looking for fcntl.h
-- Looking for fcntl.h - found
-- Looking for inttypes.h
-- Looking for inttypes.h - found
-- Looking for io.h
-- Looking for io.h - not found
-- Looking for limits.h
-- Looking for limits.h - found
-- Looking for memory.h
-- Looking for memory.h - found
-- Looking for search.h
-- Looking for search.h - found
-- Looking for string.h
-- Looking for string.h - found
-- Looking for strings.h
-- Looking for strings.h - found
-- Looking for sys/time.h
-- Looking for sys/time.h - found
-- Looking for unistd.h
-- Looking for unistd.h - found
-- Performing Test C_HAS_inline
-- Performing Test C_HAS_inline - Success
-- Check size of signed short
-- Check size of signed short - done
-- Check size of unsigned short
-- Check size of unsigned short - done
-- Check size of signed int
-- Check size of signed int - done
-- Check size of unsigned int
-- Check size of unsigned int - done
-- Check size of signed long
-- Check size of signed long - done
-- Check size of signed long long
-- Check size of signed long long - done
-- Check size of unsigned long long
-- Check size of unsigned long long - done
-- Check size of unsigned char *
-- Check size of unsigned char * - done
-- Check size of ptrdiff_t
-- Check size of ptrdiff_t - done
-- Check size of INT8
-- Check size of INT8 - failed
-- Check size of INT16
-- Check size of INT16 - failed
-- Check size of INT32
-- Check size of INT32 - failed
-- Looking for floor
-- Looking for floor - found
-- Looking for pow
-- Looking for pow - found
-- Looking for sqrt
-- Looking for sqrt - found
-- Looking for isascii
-- Looking for isascii - found
-- Looking for memset
-- Looking for memset - found
-- Looking for mmap
-- Looking for mmap - found
-- Looking for getopt
-- Looking for getopt - found
-- Looking for memmove
-- Looking for memmove - found
-- Looking for setmode
-- Looking for setmode - not found
-- Looking for strcasecmp
-- Looking for strcasecmp - found
-- Looking for strchr
-- Looking for strchr - found
-- Looking for strrchr
-- Looking for strrchr - found
-- Looking for strstr
-- Looking for strstr - found
-- Looking for strtol
-- Looking for strtol - found
-- Looking for strtol
-- Looking for strtol - found
-- Looking for strtoull
-- Looking for strtoull - found
-- Looking for lfind
-- Looking for lfind - found
-- Performing Test HAVE_SNPRINTF
-- Performing Test HAVE_SNPRINTF - Success
-- Check if the system is big endian
-- Searching 16 bit integer
-- Using unsigned short
-- Check if the system is big endian - little endian
-- Performing Test HAVE_C_WNO_UNUSED_BUT_SET_VARIABLE
-- Performing Test HAVE_C_WNO_UNUSED_BUT_SET_VARIABLE - 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_UNDEF
-- Performing Test HAVE_C_WNO_UNDEF - Success
-- Performing Test HAVE_C_WNO_UNUSED
-- Performing Test HAVE_C_WNO_UNUSED - Success
-- Performing Test HAVE_C_WNO_CAST_ALIGN
-- Performing Test HAVE_C_WNO_CAST_ALIGN - 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_POINTER_TO_INT_CAST
-- Performing Test HAVE_C_WNO_POINTER_TO_INT_CAST - Success
-- Performing Test HAVE_C_WNO_INT_TO_POINTER_CAST
-- Performing Test HAVE_C_WNO_INT_TO_POINTER_CAST - Success
-- Performing Test HAVE_C_WNO_MISLEADING_INDENTATION
-- Performing Test HAVE_C_WNO_MISLEADING_INDENTATION - Success
-- Performing Test HAVE_CXX_WNO_MISSING_DECLARATIONS
-- Performing Test HAVE_CXX_WNO_MISSING_DECLARATIONS - Success
-- Performing Test HAVE_CXX_WNO_UNUSED_PARAMETER
-- Performing Test HAVE_CXX_WNO_UNUSED_PARAMETER - Success
-- Performing Test HAVE_CXX_WNO_MISSING_PROTOTYPES
-- Performing Test HAVE_CXX_WNO_MISSING_PROTOTYPES - Failed
-- Performing Test HAVE_CXX_WNO_UNDEF
-- Performing Test HAVE_CXX_WNO_UNDEF - Success
-- 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
-- Could NOT find OpenJPEG (minimal suitable version: 2.0, recommended version >= 2.3.1). OpenJPEG will be built from sources
-- Performing Test HAVE_C_WNO_IMPLICIT_CONST_INT_FLOAT_CONVERSION
-- Performing Test HAVE_C_WNO_IMPLICIT_CONST_INT_FLOAT_CONVERSION - Failed
-- OpenJPEG: VERSION = 2.4.0, BUILD = opencv-4.5.2-dev-openjp2-2.4.0
-- Check if the system is big endian
-- Searching 16 bit integer
-- Using unsigned short
-- Check if the system is big endian - little endian
-- Looking for stdio.h
-- Looking for stdio.h - found
-- Looking for math.h
-- Looking for math.h - found
-- Looking for float.h
-- Looking for float.h - found
-- Looking for time.h
-- Looking for time.h - found
-- Looking for stdarg.h
-- Looking for stdarg.h - found
-- Looking for ctype.h
-- Looking for ctype.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for inttypes.h
-- Looking for inttypes.h - found
-- Looking for sys/stat.h
-- Looking for sys/stat.h - found
-- Looking for include file malloc.h
-- Looking for include file malloc.h - found
-- Looking for _aligned_malloc
-- Looking for _aligned_malloc - not found
-- Looking for posix_memalign
-- Looking for posix_memalign - found
-- Looking for memalign
-- Looking for memalign - found
-- Performing Test HAVE_C_WNO_STRICT_PROTOTYPES
-- Performing Test HAVE_C_WNO_STRICT_PROTOTYPES - Success
-- Performing Test HAVE_C_WNO_CAST_FUNCTION_TYPE
-- Performing Test HAVE_C_WNO_CAST_FUNCTION_TYPE - Success
-- OpenJPEG libraries will be built from sources: libopenjp2 (version "2.4.0")
-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.2.11") 
-- Found PNG: /usr/lib/x86_64-linux-gnu/libpng.so (found version "1.6.37") 
-- 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_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_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_IMPLICIT_CONST_INT_FLOAT_CONVERSION
-- Performing Test HAVE_CXX_WNO_IMPLICIT_CONST_INT_FLOAT_CONVERSION - Failed
-- Performing Test HAVE_CXX_WNO_CLASS_MEMACCESS
-- Performing Test HAVE_CXX_WNO_CLASS_MEMACCESS - Success
-- libva: missing va.h header (VA_INCLUDE_DIR)
-- IPPICV: Download: ippicv_2020_lnx_intel64_20191018_general.tgz
-- found Intel IPP (ICV version): 2020.0.0 [2020.0.0 Gold]
-- at: /home/mercy/dev/opencv_build/3rdparty/ippicv/ippicv_lnx/icv
-- found Intel IPP Integration Wrappers sources: 2020.0.0
-- at: /home/mercy/dev/opencv_build/3rdparty/ippicv/ippicv_lnx/iw
-- Could not find OpenBLAS include. Turning OpenBLAS_FOUND off
-- Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off
-- Could NOT find Atlas (missing: Atlas_CBLAS_INCLUDE_DIR Atlas_CLAPACK_INCLUDE_DIR Atlas_CBLAS_LIBRARY Atlas_BLAS_LIBRARY Atlas_LAPACK_LIBRARY) 
-- Looking for sgemm_
-- Looking for sgemm_ - not found
-- Found Threads: TRUE  
-- Could NOT find BLAS (missing: BLAS_LIBRARIES) 
-- LAPACK requires BLAS
-- A library with LAPACK API not found. Please specify library location.
-- 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 JNI: /usr/lib/jvm/default-java/lib/libjawt.so  
-- Found Pylint: /home/mercy/dev/anaconda3/bin/pylint (found version "2.6.0") 
-- Found Flake8: /home/mercy/dev/anaconda3/bin/flake8 (found version "3.8.4") 
-- VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
-- Looking for dlerror in dl
-- Looking for dlerror in dl - found
-- ADE: Download: v0.1.1f.zip
-- OpenCV Python: during development append to PYTHONPATH: /home/mercy/dev/opencv_build/python_loader
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.2") 
-- Checking for modules 'libavcodec;libavformat;libavutil;libswscale'
--   Found libavcodec, version 58.91.100
--   Found libavformat, version 58.45.100
--   Found libavutil, version 56.51.100
--   Found libswscale, version 5.7.100
-- Checking for module 'libavresample'
--   Found libavresample, version 4.0.0
-- 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 'gstreamer-video-1.0'
--   No package 'gstreamer-video-1.0' found
-- Checking for module 'libdc1394-2'
--   No package 'libdc1394-2' found
-- Allocator metrics storage type: 'long long'
-- Registering hook 'INIT_MODULE_SOURCES_opencv_dnn': /home/mercy/dev/opencv-master/modules/dnn/cmake/hooks/INIT_MODULE_SOURCES_opencv_dnn.cmake
-- opencv_dnn: filter out cuda4dnn source code
-- OpenCL samples are skipped: OpenCL SDK is required
-- SYCL/OpenCL samples are skipped: SYCL SDK is required
--    - check configuration of SYCL_DIR/SYCL_ROOT/CMAKE_MODULE_PATH
--    - ensure that right compiler is selected from SYCL SDK (e.g, clang++): CMAKE_CXX_COMPILER=/usr/bin/c++
-- Registered 'check_pylint' target: using /home/mercy/dev/anaconda3/bin/pylint (ver: 2.6.0), checks: 187
-- Registered 'check_flake8' target: using /home/mercy/dev/anaconda3/bin/flake8 (ver: 3.8.4)
--

Splitting the post here due to character limits, general configuration to
follow.

mmunson2 · May 9, 2021, 2:29am

`cmake` Output Continued:

-- General configuration for OpenCV 4.5.2-dev =====================================
--   Version control:               unknown
-- 
--   Platform:
--     Timestamp:                   2021-05-09T01:51:36Z
--     Host:                        Linux 5.8.0-50-generic x86_64
--     CMake:                       3.16.3
--     CMake generator:             Unix Makefiles
--     CMake build tool:            /usr/bin/gmake
--     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?:      YES
--     C++ standard:                11
--     C++ Compiler:                /usr/bin/c++  (ver 10.2.0)
--     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 -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 -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 -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 -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:          dl m pthread rt /usr/lib/x86_64-linux-gnu/libGL.so /usr/lib/x86_64-linux-gnu/libGLU.so
--     3rdparty dependencies:
-- 
--   OpenCV modules:
--     To be built:                 calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo stitching ts video videoio
--     Disabled:                    world
--     Disabled by dependency:      -
--     Unavailable:                 java python2 python3
--     Applications:                tests perf_tests examples apps
--     Documentation:               NO
--     Non-free algorithms:         NO
-- 
--   GUI: 
--     QT:                          YES (ver 5.9.7)
--       QT OpenGL support:         YES (Qt5::OpenGL 5.9.7)
--     GTK+:                        NO
--     OpenGL support:              YES (/usr/lib/x86_64-linux-gnu/libGL.so /usr/lib/x86_64-linux-gnu/libGLU.so)
--     VTK support:                 NO
-- 
--   Media I/O: 
--     ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.11)
--     JPEG:                        libjpeg-turbo (ver 2.0.6-62)
--     WEBP:                        build (ver encoder: 0x020f)
--     PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.6.37)
--     TIFF:                        build (ver 42 - 4.2.0)
--     JPEG 2000:                   build (ver 2.4.0)
--     OpenEXR:                     build (ver 2.3.0)
--     HDR:                         YES
--     SUNRASTER:                   YES
--     PXM:                         YES
--     PFM:                         YES
-- 
--   Video I/O:
--     DC1394:                      NO
--     FFMPEG:                      YES
--       avcodec:                   YES (58.91.100)
--       avformat:                  YES (58.45.100)
--       avutil:                    YES (56.51.100)
--       swscale:                   YES (5.7.100)
--       avresample:                YES (4.0.0)
--     GStreamer:                   NO
--     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/mercy/dev/opencv_build/3rdparty/ippicv/ippicv_lnx/icv
--     Intel IPP IW:                sources (2020.0.0)
--               at:                /home/mercy/dev/opencv_build/3rdparty/ippicv/ippicv_lnx/iw
--     VA:                          NO
--     Lapack:                      NO
--     Eigen:                       NO
--     Custom HAL:                  NO
--     Protobuf:                    build (3.5.1)
-- 
--   OpenCL:                        YES (no extra features)
--     Include path:                /home/mercy/dev/opencv-master/3rdparty/include/opencl/1.2
--     Link libraries:              Dynamic load
-- 
--   Python (for build):            /home/mercy/dev/anaconda3/bin/python3
-- 
--   Java:                          
--     ant:                         NO
--     JNI:                         /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include/linux /usr/lib/jvm/default-java/include
--     Java wrappers:               NO
--     Java tests:                  NO
-- 
--   Install to:                    /usr/local
-- -----------------------------------------------------------------
-- 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/mercy/dev/opencv_build

mmunson2 · May 9, 2021, 2:29am

`make` Command

Normally I would do make -j15 but based on a similar problem I found here:

github.com/BVLC/caffe

ImportError: /lib/x86_64-linux-gnu/librsvg-2.so.2: undefined symbol: cairo_tag_end

opened 06:50AM - 19 Jul 19 UTC

TWMazza

### Issue summary After many failed attempts and messed up Linux installations… I've successfully compiled Caffe, Protobuf and DeepDream, just to face an error when running the deepdreaming.py script for the first time. I'm not sure if the Caffe Git is the right place to post this report to, although it looks like an error during import of Caffe - my sincere apologies if I failed to pick the correct Git. `python deepdreaming.py --help` and other parameters result in the below error message: > python deepdreaming.py --help Traceback (most recent call last): File "deepdreaming.py", line 13, in <module> import caffe File "/home/twmlive/deepdream/caffe/python/caffe/__init__.py", line 1, in <module> from .pycaffe import Net, SGDSolver, NesterovSolver, AdaGradSolver, RMSPropSolver, AdaDeltaSolver, AdamSolver, NCCL, Timer File "/home/twmlive/deepdream/caffe/python/caffe/pycaffe.py", line 13, in <module> from ._caffe import Net, SGDSolver, NesterovSolver, AdaGradSolver, \ ImportError: /lib/x86_64-linux-gnu/librsvg-2.so.2: undefined symbol: cairo_tag_end ### Steps to reproduce - Open jupyter notebook in DeepDream directory - Create new terminal - Run `python deepdreaming.py` with any parameters, eg `--help` - Also happens outside the notebook ### Steps before steps to reproduce To be able to run DeepDream with as little interference as possible, I've installed Debian 10 latest from a netinstall USB drive with Debian Desktop Environment, GNOME, MATE and the standard system utilities (in previous attempts I installed MATE only rather than MATE and GNOME and faced the similar issues). After installing and setting up the system with some basic tools (like Timeshift, gparted, gdebi, Handbrake, libdvd-pkg, ffmpeg, Chrome and Opera, ...), I've been following a brief set of instructions found on Knight-of-pi.org to set up DeepDream. Though I had to make a few adjustments that may or may not be related to this: - ipython notebook doesn't exist anymore, so I had to use jupyter notebook instead - Makefile.config has been modified -- Uncomment CPU_Only=1 -- Comment PYTHON_INCLUDE for Python 2.7 (to resolve issue during compilation due to missing numpy) -- Uncomment ANACONDA_HOME and point to /home/twmlive/anaconda2 -- Uncomment PYTHON_INCLUDE for Anaconda -- Comment PYTHON_LIB for Python 2.7 -- Uncomment PYTHON_LIB for Anaconda -- Add the libhdf5-directories mentioned in your common issues section to INCLUDE_DIRS and LIBRARY_DIRS -- Uncomment USE_PKG_CONFIG := 1 for OpenCV - libhdf5_hl.so.100 was missing (not sure if it was during `make runtest` or `make pycaffe`, and so was libhdf5.so.103, and a third hdf5-related file I cannot recall the name of anymore. I had to `ln -T` three links in total to the anaconda2-libs in order to solve the issue and get make going. There was a lot of troubleshooting going on yesterday, so I may have missed one or two details. It was only the compilation process for pycaffe being so difficult, after that everything else worked quite well with barely any trouble. Also, this is probably the 50th attempt (not kidding, since once I mess up I cannot fix it and gotta start over again) in setting up a clean Debian (or other Linux distros) for DeepDream and DeepDreamVideo. ### Tried solutions - apt reinstall librsvg2-2 - I've also installed a bunch of cairo-related packages, mostly the -dev stuff via atp but cannot recall all the packages I've also tried to downgrade librsvg2-2 since I read a post about this error popping up a year ago related to some other application on Linux. But I gave up this idea since, according to the forum thread, they figured out it was only happening with a certain version of librsvg and in few environments only, so likely it has nothing to do with the lib but with the environment instead. Anyways, none of the installed packages had an impact on the problem, the error message did not change. ### System configuration * Operating system: Debian 10 Buster (stable, latest) * Compiler: gcc (Debian 8.3.0-6) 8.3.0 * CUDA version (if applicable): none * CUDNN version (if applicable): none * BLAS: Atlas (default) * Python version (if using pycaffe): Anaconda 2.7 * MATLAB version (if using matcaffe): none ### Issue checklist - [x] read the guidelines and removed the first paragraph - [x] written a short summary and detailed steps to reproduce - [x] explained how solutions to related problems failed (tick if found none) - [x] filled system configuration - [ ] attached relevant logs/config files (tick if not applicable)

I tried using LD_PRELOAD to load in libcairo before the build starts.

I’m not actually sure what I should be passing in here so don’t assume I did this correctly
I assumed that the libcairo2-dev that I installed with apt was the one I should load in.

When I searched I found three libcairo related packages at paths:

/usr/lib/x86_64-linux-gnu/libcairo.so
/usr/lib/x86_64-linux-gnu/libcairo-gobject.so
/usr/lib/x86_64-linux-gnu/libcairo-script-interpreter.so

So I made three separate build attempts with:

LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libcairo.so make -j15
LD_PRELOAD=usr/lib/x86_64-linux-gnu/libcairo-gobject.so make -j15
LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libcairo-script-interpreter.so make -j15

All of which failed. Again, not even sure if I’m using LD_PRELOAD correctly or if it makes sense for this application.

mmunson2 · May 9, 2021, 2:33am

I can provide the output of my make command if needed but it is very long and I’m not sure that it will be useful.

Anyone else experiencing a similar issue? Let me know if I can provide any additional information.

berak · May 10, 2021, 7:36am

unfortunately not an opencv error, but qt related, probably the cairo dependancy has the wrong version (is missing symbols)

your LD_PRELOAD attempts don’t change anything,
try to find out, which exact dependancies your qt version needs

mmunson2 · May 11, 2021, 3:27am

Greatly appreciate the reply. My apologies if the OpenCV forums aren’t the best place for package management hell.

I’m interested to what directed you to qt. I had a working build prior to enabling video support so my suspicion had been one of the video-related packages. Either way, pointing me away from LD_PRELOAD was very helpful, checking all my package dependencies now.

`qt` Package Dependencies:

These are the result of apt show on the opencv-related packages I’ve downloaded. If there’s a better tool for this that I should be using let me know. I don’t see anything in this batch of results, but will keep checking packages.

qtbase5-dev

Depends:

libegl-dev,
libgl-dev,
libglu1-mesa-dev | libglu-dev,
libqt5concurrent5 (= 5.14.2+dfsg-6),
libqt5core5a (= 5.14.2+dfsg-6),
libqt5dbus5 (= 5.14.2+dfsg-6),
libqt5gui5 (= 5.14.2+dfsg-6),
libqt5network5 (= 5.14.2+dfsg-6),
libqt5printsupport5 (= 5.14.2+dfsg-6),
libqt5sql5 (= 5.14.2+dfsg-6),
libqt5test5 (= 5.14.2+dfsg-6),
libqt5widgets5 (= 5.14.2+dfsg-6),
libqt5xml5 (= 5.14.2+dfsg-6),
libvulkan-dev,
libxext-dev, ← Shared with libcairo2-dev
qt5-qmake (= 5.14.2+dfsg-6),
qtbase5-dev-tools (= 5.14.2+dfsg-6),
qtchooser

qtdeclarative5-dev

Depends:

libqt5qml5 (= 5.14.2+dfsg-3ubuntu1),
libqt5quick5 (= 5.14.2+dfsg-3ubuntu1),
libqt5quickparticles5 (= 5.14.2+dfsg-3ubuntu1),
libqt5quickshapes5 (= 5.14.2+dfsg-3ubuntu1),
libqt5quicktest5 (= 5.14.2+dfsg-3ubuntu1),
libqt5quickwidgets5 (= 5.14.2+dfsg-3ubuntu1),
qt5-qmltooling-plugins,
qtbase5-dev,
qtdeclarative5-dev-tools

libcairo2-dev

Depends:

libcairo2 (= 1.16.0-4ubuntu1),
libcairo-gobject2 (= 1.16.0-4ubuntu1),
libcairo-script-interpreter2 (= 1.16.0-4ubuntu1),
libfontconfig1-dev (>= 2.2.95),
libfreetype6-dev (>= 2.1.10),
libx11-dev,
libxrender-dev (>= 0.6),
libxext-dev, ← Shared with qtbase5-dev
libpng-dev,
libsm-dev,
libpixman-1-dev (>= 0.22.0),
libxcb1-dev (>= 1.6),
libxcb-render0-dev (>= 1.6),
libxcb-shm0-dev,
libglib2.0-dev

mmunson2 · May 11, 2021, 5:44am

After looking into package dependencies more I realize that the info in my last reply probably isn’t that useful. Here’s some of the stuff I’ve tried in the meantime:

I did a reverse dependency search on libcairo2. I didn’t find any packages related to qt there though.
I looked closely at librsvg2-2 since that’s what’s failing the build. It’s obviously dependent on libcairo2 and libcairo-gobject2. The versions it wants are:
- libcairo-gobject2 (>= 1.10.0)
- libcairo2 (>= 1.15.12)

but the versions I have are:

libcairo2: Version: 1.16.0-4ubuntu1
libcairo-gobject2: Version: 1.16.0-4ubuntu1

So I’m using a version that should work. I looked into installing previous versions of libcairo2 but I don’t have any in my apt cache that I can go back to.

To try and see if the GUI or the Video Streaming was causing the issue, I built with -DWITH_FFMPEG=OFF and it was successful. I would guess this means that something on the video streaming side is causing problems.
While reading the docs on video streaming, I noticed a note that said:

Make sure a proper version of ffmpeg or gstreamer is installed. Sometimes it is a headache to work with video capture, mostly due to wrong installation of ffmpeg/gstreamer.

While this was for a python tutorial, I wonder if this should be my focus?

juacamgo · May 14, 2021, 6:55am

I would suggest you to try compile using a Docker image with Ubuntu 18.04.

I had a similar problem this week with dependencies versions. In my case, I compiled OpenCV fine using Ubuntu 20.04 but when compiling alongside my project gave me some linker errors with some libraries versions.

Finally solved it using a Docker image with Debian 9.

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Error While Building OpenCV on Ubuntu

Quick Summary

System Details

cmake Command:

cmake Output

cmake Output Continued:

make Command

qt Package Dependencies:

qtbase5-dev

qtdeclarative5-dev

libcairo2-dev

Related topics

`cmake` Command:

`cmake` Output

`cmake` Output Continued:

`make` Command

`qt` Package Dependencies: