Prompt for unresolved external symbols when compiling CVV modules #3629
Description
System Information
OpenCV version: 4.9.0
Operating System / Platform: Windows 10
Compiler & compiler version: VS 2022
Detailed description
输出-生成.txt
It seems that it is because there was no moc applied to the object of qt, and the file moc_xxx was not found in the compilation directory
view_controller.obj : error LNK2001: 无法解析的外部符号 "public: virtual struct QMetaObject const * __cdecl cvv::gui::CallTab::metaObject(void)const " (?metaObject@CallTab@gui@cvv@@UEBAPEBUQMetaObject@@XZ)
image_call_tab.obj : error LNK2001: 无法解析的外部符号 "public: virtual struct QMetaObject const * __cdecl cvv::gui::CallTab::metaObject(void)const " (?metaObject@CallTab@gui@cvv@@UEBAPEBUQMetaObject@@XZ)
view_controller.obj : error LNK2001: 无法解析的外部符号 "public: virtual void * __cdecl cvv::gui::CallTab::qt_metacast(char const *)" (?qt_metacast@CallTab@gui@cvv@@UEAAPEAXPEBD@Z)
image_call_tab.obj : error LNK2001: 无法解析的外部符号 "public: virtual void * __cdecl cvv::gui::CallTab::qt_metacast(char const *)" (?qt_metacast@CallTab@gui@cvv@@UEAAPEAXPEBD@Z)
Steps to reproduce
clone
git clone --branch 4.9.0 --depth 1 https://github.com/opencv/opencv.git
git clone --branch 4.9.0 --depth 1 https://github.com/opencv/opencv_contrib.git
output
Cloning into 'opencv'...
remote: Enumerating objects: 8638, done.
remote: Counting objects: 100% (8638/8638), done.
remote: Compressing objects: 100% (7371/7371), done.
remote: Total 8638 (delta 1370), reused 4372 (delta 839), pack-reused 0
Receiving objects: 100% (8638/8638), 87.25 MiB | 8.61 MiB/s, done.
Resolving deltas: 100% (1370/1370), done.
Note: switching to 'dad8af6b17f8e60d7b95a1203a1b4d22f56574cf'.
Cloning into 'opencv_contrib'...
remote: Enumerating objects: 3798, done.
remote: Counting objects: 100% (3798/3798), done.
remote: Compressing objects: 100% (3189/3189), done.
remote: Total 3798 (delta 677), reused 2130 (delta 356), pack-reused 0
Receiving objects: 100% (3798/3798), 53.53 MiB | 9.08 MiB/s, done.
Resolving deltas: 100% (677/677), done.
Note: switching to 'c7602a8f74205e44389bd6a4e8d727d32e7e27b4'.
install qt 5.15.2 msvc2019
Install through the official QT installer
open cmake-gui
Selecting Windows SDK version 10.0.22621.0 to target Windows 10.0.22631.
Detected processor: AMD64
Could NOT find PythonInterp (missing: PYTHON_EXECUTABLE) (Required is at least version "3.2")
libjpeg-turbo: VERSION = 2.1.3, BUILD = opencv-4.9.0-libjpeg-turbo
libjpeg-turbo(SIMD): SIMD extensions disabled: could not find NASM compiler. Performance will suffer.
Could NOT find OpenJPEG (minimal suitable version: 2.0, recommended version >= 2.3.1). OpenJPEG will be built from sources
OpenJPEG: VERSION = 2.5.0, BUILD = opencv-4.9.0-openjp2-2.5.0
OpenJPEG libraries will be built from sources: libopenjp2 (version "2.5.0")
found Intel IPP (ICV version): 2021.11.0 [2021.11.0]
at: C:/Users/Public/dev/opencv/build/3rdparty/ippicv/ippicv_win/icv
found Intel IPP Integration Wrappers sources: 2021.11.0
at: C:/Users/Public/dev/opencv/build/3rdparty/ippicv/ippicv_win/iw
Could not find OpenBLAS include. Turning OpenBLAS_FOUND off
Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off
Could NOT find BLAS (missing: BLAS_LIBRARIES)
Could NOT find LAPACK (missing: LAPACK_LIBRARIES)
Reason given by package: LAPACK could not be found because dependency BLAS could not be found.
VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
Module opencv_alphamat disabled because the following dependencies are not found: Eigen
freetype2: NO
harfbuzz: NO
Julia not found. Not compiling Julia Bindings.
Module opencv_ovis disabled because OGRE3D was not found
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.
Failed to find installed gflags CMake configuration, searching for gflags build directories exported with CMake.
Failed to find gflags - Failed to find an installed/exported CMake configuration for gflags, will perform search for installed gflags components.
Failed to find gflags - Could not find gflags include directory, set GFLAGS_INCLUDE_DIR to directory containing gflags/gflags.h
Failed to find glog - Could not find glog include directory, set GLOG_INCLUDE_DIR to directory containing glog/logging.h
Module opencv_sfm disabled because the following dependencies are not found: Eigen Glog/Gflags
Processing WORLD modules...
module opencv_core...
Allocator metrics storage type: 'long long'
module opencv_flann...
module opencv_imgproc...
module opencv_features2d...
module opencv_imgcodecs...
imgcodecs: OpenEXR codec is disabled in runtime. Details: https://github.com/opencv/opencv/issues/21326
module opencv_videoio...
module opencv_calib3d...
module opencv_cvv...
module opencv_video...
module opencv_xfeatures2d...
Processing WORLD modules... DONE
Excluding from source files list: modules/imgproc/src/imgwarp.lasx.cpp
Excluding from source files list: modules/imgproc/src/resize.lasx.cpp
General configuration for OpenCV 4.9.0 =====================================
Version control: 4.9.0
Extra modules:
Location (extra): C:/Users/Public/dev/opencv_contrib/modules
Version control (extra): 4.9.0
Platform:
Timestamp: 2024-01-24T08:00:00Z
Host: Windows 10.0.22631 AMD64
CMake: 3.26.4
CMake generator: Visual Studio 17 2022
CMake build tool: C:/Program Files/Microsoft Visual Studio/2022/Professional/MSBuild/Current/Bin/amd64/MSBuild.exe
MSVC: 1936
Configuration: Debug 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 (14 files): + SSSE3 SSE4_1
SSE4_2 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2
FP16 (0 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
AVX (3 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
AVX2 (28 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
AVX512_SKX (3 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: C:/Program Files/Microsoft Visual Studio/2022/Professional/VC/Tools/MSVC/14.36.32532/bin/Hostx64/x64/cl.exe (ver 19.36.32535.0)
C++ flags (Release): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /wd4819 /MP /O2 /Ob2 /DNDEBUG
C++ flags (Debug): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /wd4819 /MP /Zi /Ob0 /Od /RTC1
C Compiler: C:/Program Files/Microsoft Visual Studio/2022/Professional/VC/Tools/MSVC/14.36.32532/bin/Hostx64/x64/cl.exe
C flags (Release): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP /O2 /Ob2 /DNDEBUG
C flags (Debug): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP /Zi /Ob0 /Od /RTC1
Linker flags (Release): /machine:x64 /INCREMENTAL:NO
Linker flags (Debug): /machine:x64 /debug /INCREMENTAL
ccache: NO
Precompiled headers: NO
Extra dependencies:
3rdparty dependencies:
OpenCV modules:
To be built: calib3d core cvv features2d flann imgcodecs imgproc video videoio world xfeatures2d
Disabled: aruco bgsegm bioinspired ccalib datasets dnn dnn_objdetect dnn_superres dpm face fuzzy gapi hfs highgui img_hash intensity_transform java_bindings_generator js_bindings_generator line_descriptor mcc ml objc_bindings_generator objdetect optflow phase_unwrapping photo plot python_bindings_generator python_tests quality rapid reg rgbd saliency shape stereo stitching structured_light superres surface_matching text tracking videostab wechat_qrcode ximgproc xobjdetect xphoto
Disabled by dependency: -
Unavailable: alphamat cannops cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev freetype hdf java julia matlab ovis python2 python3 sfm ts viz
Applications: -
Documentation: NO
Non-free algorithms: YES
Windows RT support: NO
GUI:
QT: YES (ver 5.15.2 )
QT OpenGL support: NO
Win32 UI: YES
VTK support: NO
Media I/O:
ZLib: build (ver 1.3)
JPEG: build-libjpeg-turbo (ver 2.1.3-62)
SIMD Support Request: YES
SIMD Support: NO
WEBP: build (ver encoder: 0x020f)
PNG: build (ver 1.6.37)
TIFF: build (ver 42 - 4.2.0)
JPEG 2000: build (ver 2.5.0)
OpenEXR: build (ver 2.3.0)
HDR: YES
SUNRASTER: YES
PXM: YES
PFM: YES
Video I/O:
DC1394: NO
FFMPEG: YES (prebuilt binaries)
avcodec: YES (58.134.100)
avformat: YES (58.76.100)
avutil: YES (56.70.100)
swscale: YES (5.9.100)
avresample: YES (4.0.0)
GStreamer: NO
DirectShow: YES
Media Foundation: YES
DXVA: YES
Parallel framework: Concurrency
Trace: YES (built-in)
Other third-party libraries:
Intel IPP: 2021.11.0 [2021.11.0]
at: C:/Users/Public/dev/opencv/build/3rdparty/ippicv/ippicv_win/icv
Intel IPP IW: sources (2021.11.0)
at: C:/Users/Public/dev/opencv/build/3rdparty/ippicv/ippicv_win/iw
Lapack: NO
Eigen: NO
Custom HAL: NO
Protobuf: build (3.19.1)
Flatbuffers: builtin/3rdparty (23.5.9)
OpenCL: YES (NVD3D11)
Include path: C:/Users/Public/dev/opencv/3rdparty/include/opencl/1.2
Link libraries: Dynamic load
Python (for build): NO
Install to: C:/Users/Public/dev/opencv/build/install
-----------------------------------------------------------------
Configuring done (5.0s)
Generating done (1.0s)
Issue submission checklist
- I report the issue, it's not a questionI checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solutionI updated to the latest OpenCV version and the issue is still thereThere is reproducer code and related data files (videos, images, onnx, etc)
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GengGode commentedon Jan 24, 2024
After manually executing moc on xxx.hpp.Add moc_ xxx.cpp to the project.
Can solve the problem of symbol not being found in xxx.obj
You can see that the error message from main_call_window.obj has disappeared
输出-生成.txt
But I couldn't find a solution to fix it by setting up relevant code in CMake
GengGode commentedon Jan 24, 2024
As long as the BUILD_opencv_world is not checked, it can be successfully built. I don't know if this is intentional or not
GengGode commentedon Jan 25, 2024
I found that the reason is that qt needs to be AUTOMOC before target creation, but qt in cvv is only found in cvv's cmakelist. When compiling the opencv_world, the cmakelist in cvv was not run, so there are no qt and moc for the opencv_world.
As a result, I made some modifications in cmakelist in opencv_world, moc the source and header files of cvv in opencv_world(but I don't know why I can't set only the moc part of the file, so it now moc all the source and header files), and after the modifications, I compiled a opencv_world.dll file linked to qt.
After testing, it works very well
fix pr:opencv/opencv#24921