QtWebEngineCore deployment issue

Jokunsby

I have a program using QtWebEngine built on ArchLinux. When I do cmake --install, I have an error:

CMake Error at /usr/lib/cmake/Qt6WebEngineCore/Qt6WebEngineCoreDeploySupport.cmake:165 (file):
  file INSTALL cannot find "/usr/share/qt6/resources/icudtl.dat": No such
  file or directory.
Call Stack (most recent call first):
  /usr/lib/cmake/Qt6WebEngineCore/Qt6WebEngineCoreDeploySupport.cmake:53 (_qt_internal_deploy_webenginecore_data)
  /usr/lib/cmake/Qt6WebEngineCore/Qt6WebEngineCoreDeploySupport.cmake:48 (_qt_internal_deploy_webenginecore)
  /usr/lib/cmake/Qt6Core/Qt6CoreDeploySupport.cmake:174 (_qt_internal_webenginecore_deploy_hook)
  /usr/lib/cmake/Qt6Core/Qt6CoreDeploySupport.cmake:174 (cmake_language)
  /usr/lib/cmake/Qt6Core/Qt6CoreDeploySupport.cmake:315 (_qt_internal_run_deployment_hooks)
  /usr/lib/cmake/Qt6Core/Qt6CoreDeploySupport.cmake:514 (_qt_internal_generic_deployqt)
  .qt/deploy_fuldon_e9f90ced5a.cmake:5 (qt6_deploy_runtime_dependencies)
  cmake_install.cmake:76 (include)

I've check the directory /usr/share/qt6/resources/, and there is no icudtl.dat file.
I've check the ArchLinux package content and there is no icudtl.dat file.
But in the /usr/lib/cmake/Qt6WebEngineCore/Qt6WebEngineCoreDeploySupport.cmake file, it looks for this file.
Do I need to add manually an icudtl.dat to /usr/share/qt6/resources? Because if I comment this file in searched in the list, cmake --install works. But doing this, at the next update of the package, I will lost my comment.

Jokunsby

I've found an icudtl.dat in /usr/local/resources. I suppose it's the system one.

I've made a small fix in my CMakeLists by doing:

if(LINUX)
    # Check if icudtl.dat exists for Qt6WebEngine deployment
    if(EXISTS "/usr/share/qt6/resources/icudtl.dat")
        message(STATUS "Found icudtl.dat in /usr/share/qt6/resources")
    else()
        # Check if icudtl.dat is in /usr/local/resources
        if(EXISTS "/usr/local/resources/icudtl.dat")
            message(STATUS "Found icudtl.dat in /usr/local/resources")

            # Generate a symlink from /usr/local/resources/icudtl.dat to /usr/share/qt6/resources
            install(CODE "
                message(STATUS \"Creating symlink for icudtl.dat\")
                execute_process(
                    COMMAND ${CMAKE_COMMAND} -E create_symlink
                    /usr/local/resources/icudtl.dat
                    /usr/share/qt6/resources/icudtl.dat
                )
            ")
        else()
            message(FATAL_ERROR "icudtl.dat not found in /usr/share/qt6/resources or /usr/local/resources")
        endif()
    endif()
endif()

But I'm not sure that it's the best way to do it.