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Forum Update on Monday, May 27th 2025

Qt Commercial License Terms, Independent Developers

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  • L Offline
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    luca
    wrote on 25 May 2018, 07:54 last edited by
    #24

    Where can I find a list of LGPL Qt modules for a specific release of Qt ?

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    • J JonB
      25 May 2018, 07:33

      @ambershark said in Qt Commercial License Terms, Independent Developers:

      Since you can now link dynamically on both iOS and android

      Ah, right, is that what I was thinking I recalled when I wrote

      I think it used to require static linking maybe, but not now

      ? Have they made it so you can now but didn't used to be able to? OOI, is that a change at the Android side or the Qt side to make it possible?

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      ambershark
      wrote on 25 May 2018, 08:20 last edited by
      #25

      @JonB Pretty sure android always supported dynamic linking, although I could be wrong here, I'm not really a mobile developer. I've done one back end library on mobile and that was it.

      It was iOS that used to be static only and change to allow dynamic linking recently (like last year or 2).

      My L-GPL'd C++ Logger github.com/ambershark-mike/sharklog

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        Cheng shi hua
        wrote on 4 Dec 2019, 11:38 last edited by
        #26

        I am an independent game author. If I use LGPL, develop a library that uses QML and dynamically links QT, and then publish it to steam, do I need to pay QT or open source?

        J 1 Reply Last reply 4 Dec 2019, 11:44
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        • C Cheng shi hua
          4 Dec 2019, 11:38

          I am an independent game author. If I use LGPL, develop a library that uses QML and dynamically links QT, and then publish it to steam, do I need to pay QT or open source?

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          jsulm
          Lifetime Qt Champion
          wrote on 4 Dec 2019, 11:44 last edited by
          #27

          @Cheng-shi-hua said in Qt Commercial License Terms, Independent Developers:

          do I need to pay QT or open source?

          No, as long as you can fulfill LGPL3 you do not need commercial license and do not have to open your source code.
          LGPL3 requires you to provide users the possibility to replace Qt libraries with their own versions. This usually requires you to provide object files (.o), so users can relink. And it is not possible when using static Qt libraries!

          Keep in mind people here (me included) are not lawyers!

          https://forum.qt.io/topic/113070/qt-code-of-conduct

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            Cheng shi hua
            wrote on 4 Dec 2019, 12:34 last edited by
            #28

            No QT official came out to clarify? This matter is important

            J 1 Reply Last reply 4 Dec 2019, 12:36
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            • C Cheng shi hua
              4 Dec 2019, 12:34

              No QT official came out to clarify? This matter is important

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              jsulm
              Lifetime Qt Champion
              wrote on 4 Dec 2019, 12:36 last edited by
              #29

              @Cheng-shi-hua This forum is for Qt users and not "Qt officials". If you want an answer from Qt officials then pleas ask Qt Company.

              https://forum.qt.io/topic/113070/qt-code-of-conduct

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                Cheng shi hua
                wrote on 4 Dec 2019, 13:15 last edited by
                #30

                This is the case, thank you very much. Since it is a community, you can advertise here when I develop a game :)

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                  LarryCox
                  Banned
                  wrote on 15 Oct 2022, 04:14 last edited by
                  #31
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                    ThomasGrace123
                    Banned
                    wrote on 27 Oct 2022, 09:45 last edited by
                    #32
                    This post is deleted!
                    V 1 Reply Last reply 5 Nov 2022, 09:49
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                    • T ThomasGrace123
                      27 Oct 2022, 09:45

                      This post is deleted!

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                      vosob80267
                      Banned
                      wrote on 5 Nov 2022, 09:49 last edited by vosob80267 11 May 2022, 09:49
                      #33
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                        JamesPalmer
                        Banned
                        wrote on 5 Nov 2022, 13:38 last edited by
                        #34
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                          Betty R. Harris
                          Banned
                          wrote on 7 Nov 2022, 10:33 last edited by Betty R. Harris 11 Jul 2022, 10:35
                          #35
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