mkdir build && cd build
~/qtbase/bin/qt-cmake ~/qt3d/examples/qt3d/scene3d
ninja

duplicate symbol 'qInitResources_scene3d()' in:
    CMakeFiles/scene3d.dir/.rcc/qrc_scene3d.cpp.o
    /Volumes/T3/Dev/qt/qt5_cmake/builds/6.3-ios-simulator-deb/qt3d/src/quick3d/imports/scene3d/CMakeFiles/qtquickscene3dplugin_resources_2.dir/./.rcc/qrc_scene3d.cpp.o
duplicate symbol 'qCleanupResources_scene3d()' in:
    CMakeFiles/scene3d.dir/.rcc/qrc_scene3d.cpp.o
    /Volumes/T3/Dev/qt/qt5_cmake/builds/6.3-ios-simulator-deb/qt3d/src/quick3d/imports/scene3d/CMakeFiles/qtquickscene3dplugin_resources_2.dir/./.rcc/qrc_scene3d.cpp.o
duplicate symbol 'Qt3DRender::Debug::CommandExecuter::executeCommand(QList<QString> const&)' in:
    /Volumes/T3/Dev/qt/qt5_cmake/builds/6.3-ios-simulator-deb/qtbase/plugins/renderers/libopenglrenderer_debug.a(commandexecuter.cpp.o)
    /Volumes/T3/Dev/qt/qt5_cmake/builds/6.3-ios-simulator-deb/qtbase/plugins/renderers/librhirenderer_debug.a(commandexecuter.cpp.o)