qt_generate_deploy_app_script fails to deploy necessary libs and platform plugins on Ubuntu 22.04 LTS

mayart

Using Cmake, we link against several Qt libraries

            find_package(Qt6 COMPONENTS Widgets 
                                        Core
                                        Gui
                                        Sql
                                        Xml
                                        Network
                                        OpenGL
                                        UiTools
                                        Qml
                                        Quick
                                        QuickWidgets
                                        WebSockets
                                        Multimedia
                                        OpenGLWidgets
                                        REQUIRED)
target_link_libraries(OurApp ${LIBS}
							Qt6::Core 
							Qt6::Gui 
							Qt6::Widgets 
							Qt6::Sql 
							Qt6::Xml 
							Qt6::Network 
							Qt6::Qml 
							Qt6::QuickWidgets  
							Qt6::WebSockets
							Qt6::Multimedia)

and we have a distribution macro tailored per-platform, the Linux version using the built-in Cmake-function provided by Qt6

    macro(copy_dlls TARGET_NAME)
        qt_finalize_target(${TARGET_NAME})
        qt_generate_deploy_app_script(
            TARGET ${TARGET_NAME}
            OUTPUT_SCRIPT linuxdeployqt
            NO_UNSUPPORTED_PLATFORM_ERROR
            NO_TRANSLATIONS
        )
        install(TARGETS ${TARGET_NAME}
            RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
        )
        install(SCRIPT ${linuxdeployqt})
    endmacro()

This mostly works except with two critical failures

Libraries for Qt Widgets, QuickWidgets, and Xml are not copied.
Only Xcb platform plugin is copied, but Ubuntu uses Wayland.

I cannot find any information on how to select which platform plugins should be used, and have no theory whatsoever why deployment would ignore some libraries (especially a crucial one like Widgets). How do I go about ensuring the right libraries and plugins are included in the deployment?

mayart

To add to this, I managed to hack around by looping over the Qt libraries we include and copying manually, however with another target the Qt deployment is refusing to copy libicuuc, libicudata, and libicuil8n, all of which come from Qt but we're not linking to directly. How is this deployment supposed to work exactly? Are we just using it completely wrong?

mayart

And again to add as well, the plugins folder for this other target is completely skipped.