[REG 6.6.0->6.5.1] demos/documentviewer not compiling on macOS

6.6.0/macos/bin/qt-cmake -S /Users/qt/RTA/Qt_6.6.0/Examples/Qt-6.6.0/demos/documentviewer -B /Users/qt/RTA/Qt_6.6.0/Examples/Qt-6.6.0/demos/documentviewer/bld_macos -GNinja 

[1/17] Building CXX object plugins/txtviewer/CMakeFiles/txtviewer.dir/__/__/app/abstractviewer.cpp.o
[2/17] Building CXX object plugins/jsonviewer/CMakeFiles/jsonviewer.dir/__/__/app/abstractviewer.cpp.o
[3/17] Building CXX object plugins/txtviewer/CMakeFiles/txtviewer.dir/txtviewer.cpp.o
[4/17] Linking CXX shared module app/libtxtviewer.dylib
FAILED: app/libtxtviewer.dylib 
: && /usr/bin/clang++  -isysroot /Applications/Xcode13.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.1.sdk -mmacosx-version-min=11.0 -bundle -Wl,-headerpad_max_install_names  -o app/libtxtviewer.dylib plugins/txtviewer/CMakeFiles/txtviewer.dir/txtviewer.cpp.o plugins/txtviewer/CMakeFiles/txtviewer.dir/__/__/app/abstractviewer.cpp.o -F/Users/qt/RTA/Qt_6.6.0/6.6.0/macos/lib -Wl,-rpath,/Users/qt/RTA/Qt_6.6.0/6.6.0/macos/lib  /Users/qt/RTA/Qt_6.6.0/6.6.0/macos/lib/QtPrintSupport.framework/Versions/A/QtPrintSupport  /Users/qt/RTA/Qt_6.6.0/6.6.0/macos/lib/QtWidgets.framework/Versions/A/QtWidgets  /Users/qt/RTA/Qt_6.6.0/6.6.0/macos/lib/QtGui.framework/Versions/A/QtGui  /Users/qt/RTA/Qt_6.6.0/6.6.0/macos/lib/QtCore.framework/Versions/A/QtCore  -framework IOKit  -framework DiskArbitration  -Xlinker -framework -Xlinker OpenGL  -Xlinker -framework -Xlinker AGL  -framework AppKit  -framework ImageIO  -framework Metal  -framework ApplicationServices  /Applications/Xcode13.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.1.sdk/usr/lib/libcups.tbd && :
Undefined symbols for architecture x86_64:
  "AbstractViewer::showMessage(QString const&, int)", referenced from:
      AbstractViewer::statusMessage(QString const&, QString const&, int) in abstractviewer.cpp.o
  "AbstractViewer::uiInitialized()", referenced from:
      TxtViewer::init(QFile*, QWidget*, QMainWindow*) in txtviewer.cpp.o
      AbstractViewer::initViewer(QAction*, QAction*, QAction*, QTabWidget*) in abstractviewer.cpp.o
  "AbstractViewer::staticMetaObject", referenced from:
      QMetaObject::Connection QObject::connect<void (AbstractViewer::*)(), void (TxtViewer::*)()>(QtPrivate::FunctionPointer<void (AbstractViewer::*)()>::Object const*, void (AbstractViewer::*)(), QtPrivate::ContextTypeForFunctor<void (TxtViewer::*)(), void>::ContextType const*, void (TxtViewer::*&&)(), Qt::ConnectionType) in txtviewer.cpp.o
      AbstractViewer::tr(char const*, char const*, int) in abstractviewer.cpp.o
  "AbstractViewer::printingEnabledChanged(bool)", referenced from:
      AbstractViewer::maybeSetPrintingEnabled(bool) in abstractviewer.cpp.o
  "TxtViewer::staticMetaObject", referenced from:
      TxtViewer::tr(char const*, char const*, int) in txtviewer.cpp.o
  "vtable for AbstractViewer", referenced from:
      AbstractViewer::AbstractViewer() in abstractviewer.cpp.o
      AbstractViewer::~AbstractViewer() in abstractviewer.cpp.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
[5/17] Building CXX object plugins/jsonviewer/CMakeFiles/jsonviewer.dir/jsonviewer.cpp.o
ninja: build stopped: subcommand failed.