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QLinkedList undefined external symbol

  • Using Visual Studio 19 Professional 16.6.5 and Qt 5.14.2 and am getting a
    Error LNK2001 unresolved external symbol "__declspec(dllimport) public: __cdecl QLinkedListData::QLinkedListData(void)" (_imp??0QLinkedListData@@QEAA@XZ) when attempting to link the application. This code has been unchanged for a while but have recently updated Visual Studio to the latest and updated Qt from 5.13.2 to 5.14.2 based on QTBUG-81727. If I comment out calls to append and erase it links. Suggestions of what to try next?

  • Hi I encountered the same problem and found out that it issue comes from the Platform Toolset in your Project properties.

    When you go to the property pages

    • Configuration Properties section -> General -> Platform Toolset -> Change it for Visual Studio 2017 (v141)

    Recompile the project and you should get your dll. Don't forget to create a ticket for this bug with Microsoft Visual Studio repository.

    The solution is explained here :

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