Compiled succeed, but failed to link.

[tanggengsheng]

I had installed Qt6 with llvm-mingw 64-bit kit on Windows 11.
And I create a Qt project on VSCode, It compiled succeed but failed to link.

[main] Building folder: FramelessWindow 
[build] Starting build
[proc] Executing command: "C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe" --build c:/Users/tgs/Documents/Qt/FramelessWindow/build --config Debug --target all -j 8 --
[build] [  0%] Built target FramelessWindow_autogen_timestamp_deps
[build] [ 16%] Built target FramelessWindow_autogen
[build] [ 33%] Linking CXX executable FramelessWindow.exe
[build] ld.lld: error: undefined symbol: __declspec(dllimport) QObjectData::dynamicMetaObject() const
[build] >>> referenced by C:\Users\tgs\Documents\Qt\FramelessWindow\build\FramelessWindow_autogen/UVLADIE3JM/moc_FramelessWindow.cpp:78
[build] >>>               objects.a(mocs_compilation.cpp.obj):(FramelessWindow::metaObject() const)
[build] 
[build] ld.lld: error: undefined symbol: __declspec(dllimport) QMainWindow::qt_metacast(char const*)
[build] >>> referenced by C:\Users\tgs\Documents\Qt\FramelessWindow\build\FramelessWindow_autogen/UVLADIE3JM/moc_FramelessWindow.cpp:86
[build] >>>               objects.a(mocs_compilation.cpp.obj):(FramelessWindow::qt_metacast(char const*))
[build] 
[build] ld.lld: error: undefined symbol: __declspec(dllimport) QMainWindow::qt_metacall(QMetaObject::Call, int, void**)
[build] >>> referenced by C:\Users\tgs\Documents\Qt\FramelessWindow\build\FramelessWindow_autogen/UVLADIE3JM/moc_FramelessWindow.cpp:91
[build] >>>               objects.a(mocs_compilation.cpp.obj):(FramelessWindow::qt_metacall(QMetaObject::Call, int, void**))
[build] 
[build] ld.lld: error: undefined symbol: __declspec(dllimport) QMainWindow::staticMetaObject
[build] >>> referenced by C:/Users/tgs/anaconda3/Library/include/qt/QtCore/qobjectdefs.h:577
[build] >>>               objects.a(mocs_compilation.cpp.obj):(QMetaObject const* QMetaObject::staticMetaObject<QMainWindow::staticMetaObject>())
[build] 
[build] ld.lld: error: undefined symbol: QMainWindow::event(QEvent*)
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QObject::eventFilter(QObject*, QEvent*)
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QObject::timerEvent(QTimerEvent*)
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QObject::childEvent(QChildEvent*)
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QObject::customEvent(QEvent*)
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QObject::connectNotify(QMetaMethod const&)
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QObject::disconnectNotify(QMetaMethod const&)
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QWidget::devType() const
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QWidget::setVisible(bool)
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QWidget::sizeHint() const
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QWidget::minimumSizeHint() const
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QWidget::heightForWidth(int) const
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QWidget::hasHeightForWidth() const
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QWidget::paintEngine() const
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QWidget::mousePressEvent(QMouseEvent*)
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: undefined symbol: QWidget::mouseReleaseEvent(QMouseEvent*)
[build] >>> referenced by objects.a(mocs_compilation.cpp.obj):(vtable for FramelessWindow)
[build] 
[build] ld.lld: error: too many errors emitted, stopping now (use --error-limit=0 to see all errors)
[build] clang-17: error: linker command failed with exit code 1 (use -v to see invocation)
[build] mingw32-make[2]: *** [CMakeFiles\FramelessWindow.dir\build.make:144: FramelessWindow.exe] Error 1
[build] mingw32-make[1]: *** [CMakeFiles\Makefile2:85: CMakeFiles/FramelessWindow.dir/all] Error 2
[build] mingw32-make: *** [Makefile:90: all] Error 2
[proc] The command: "C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe" --build c:/Users/tgs/Documents/Qt/FramelessWindow/build --config Debug --target all -j 8 -- exited with code: 2
[driver] Build completed: 00:00:00.811
[build] Build finished with exit code 2

Why it use Visual Studio to build the project? I had choose the llvm kit.