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Q: Go where (which forum) to ask a licensing-related question?

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  • A Offline
    A Offline
    Alexander Swift
    wrote on last edited by
    #1

    I am asking the below question in the wrong forum, but don't know where to ask it. I bet if I ask in The Lounge, someone will post go <there>. Here's hoping!

    Situation:
    I have previously developed a Windows background process (written in C++). It is closed-source, distributed as binary, for profit. It has no user interface, but receives and transmits signals allowing control by an external interface. It has no connection with Qt.

    I am considering using Qt to develop an open-source (LGPL) GUI application, to communicate with that process to allow user control. This GUI, in addition to being open-source, is intended to be one of several GUI options available to users, who may freely use, adopt, share, or even replace GUIs - but not the process with which the GUI communicates.

    Question:
    If I choose Qt to create and maintain this GUI app, and only the GUI app, is the open-source license available to me? Will my development, or for-profit distribution, of the non-Qt background process be constrained in any way?

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi and welcome to devnet,

      WARNING: I am not a lawyer.

      License questions should be asked to a lawyer not a forum.

      That said, you have here two separate products that are not related to each other. As you wrote your GUI application uses a publique interface to communicate with your closed source application so you can use Qt's OpenSource license for that part.

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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      • A Offline
        A Offline
        Alexander Swift
        wrote on last edited by
        #3

        SGaist, many thanks for your thoughts. :-)

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