Prompt for unresolved external symbols when compiling CVV modules about opencv_contrib HOT 3 OPEN

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

from opencv_contrib.

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

from opencv_contrib.

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

from opencv_contrib.