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[SOLVED]Freely distribute the Qt shared libraries (DLLs)?

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    stukdev
    wrote on 15 Dec 2010, 08:52 last edited by
    #7

    Yes, but some user don't know this simple procedure and i have to write a minimal guide for this.
    User != technician :P

    [quote author="peppe" date="1292403048"]... which you already do by using dynamic linking: the user will just have to drop in the replacements.[/quote]

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      Guest
      wrote on 15 Dec 2010, 09:41 last edited by
      #8

      hi loaden, do check this out: "http://blog.qt.nokia.com/2009/11/30/qt-making-the-right-licensing-decision/":http://blog.qt.nokia.com/2009/11/30/qt-making-the-right-licensing-decision/

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        andre
        wrote on 15 Dec 2010, 10:24 last edited by
        #9

        [quote author="stuk" date="1292403168"]Yes, but some user don't know this simple procedure and i have to write a minimal guide for this.
        User != technician :P

        [quote author="peppe" date="1292403048"]... which you already do by using dynamic linking: the user will just have to drop in the replacements.[/quote]

        [/quote]
        As far as I know, the LGPL does not require you to explain how to do it. Just to make it possible to do so. I don't think writing a manual that states that you can drop in newer versions of the Qt library files is needed.

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          dangelog
          wrote on 15 Dec 2010, 10:35 last edited by
          #10

          [quote author="stuk" date="1292403168"]Yes, but some user don't know this simple procedure and i have to write a minimal guide for this.
          User != technician :P

          [quote author="peppe" date="1292403048"]... which you already do by using dynamic linking: the user will just have to drop in the replacements.[/quote]
          [/quote]

          The LGPL doesn't require you to make your users smarter :-)

          Software Engineer
          KDAB (UK) Ltd., a KDAB Group company

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            anselmolsm
            wrote on 15 Dec 2010, 11:23 last edited by
            #11

            This 'allow updates' requirement is a way to guarantee your proprietary application does not depend on modifications you did in the library - it must be possible for the software to be linked with a newer version of the LGPL library (Qt, in this case :-P), not only to your Qt version. So, if you modify Qt (what is not you case, as you said), to respect LGPL you must submit the changes upstream.

            I'm not a lawyer [1], please correct me if I'm wrong

            [1] In 100% of the license discussions, someone must say this sentence, at least once =P

            Anselmo L. S. Melo (anselmolsm)

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              Loaden
              wrote on 15 Dec 2010, 23:48 last edited by
              #12

              Thanks a lot!!

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                dangelog
                wrote on 15 Dec 2010, 23:56 last edited by
                #13

                [quote author="anselmolsm" date="1292412214"]I'm not a lawyer [1], please correct me if I'm wrong

                [1] In 100% of the license discussions, someone must say this sentence, at least once =P[/quote]

                You're absolutely right. Was thinking if this should be some kind of FAQ: "Never ever ask for legal advice on forums, mailing lists, IRC and whatsoever. Consult an IT lawyer." (?)

                Software Engineer
                KDAB (UK) Ltd., a KDAB Group company

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                  goetz
                  wrote on 16 Dec 2010, 09:40 last edited by
                  #14

                  [quote author="peppe" date="1292457362"]You're absolutely right. Was thinking if this should be some kind of FAQ: "Never ever ask for legal advice on forums, mailing lists, IRC and whatsoever. Consult an IT lawyer." (?)
                  [/quote]

                  That might not help either. If you ask three of these guys you will get four opinions....

                  http://www.catb.org/~esr/faqs/smart-questions.html

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                    dangelog
                    wrote on 16 Dec 2010, 09:59 last edited by
                    #15

                    [quote author="Volker" date="1292492418"][quote author="peppe" date="1292457362"]You're absolutely right. Was thinking if this should be some kind of FAQ: "Never ever ask for legal advice on forums, mailing lists, IRC and whatsoever. Consult an IT lawyer." (?)
                    [/quote]

                    That might not help either. If you ask three of these guys you will get four opinions....[/quote]

                    Haha, ok, point taken, but at least they're supposed to know the matter and you sign agreements with them, whilst on forums you have no guarantees whatsoever.

                    Software Engineer
                    KDAB (UK) Ltd., a KDAB Group company

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                      goetz
                      wrote on 16 Dec 2010, 10:09 last edited by
                      #16

                      [quote author="peppe" date="1292493548]Haha, ok, point taken, but at least they're supposed to know the matter and you sign agreements with them, whilst on forums you have no guarantees whatsoever.[/quote]

                      That's true. It's in most cases better to ask a specialized lawyer than a forum with all that "I believe that..." answers.

                      http://www.catb.org/~esr/faqs/smart-questions.html

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                        giesbert
                        wrote on 16 Dec 2010, 10:16 last edited by
                        #17

                        But if you ask 3 lawyers, you perhaps get also 4 answers.
                        Perhaps the Trolls can make a definite statement? That could then also be put to FAQ?

                        Nokia Certified Qt Specialist.
                        Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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                          Loaden
                          wrote on 20 Dec 2010, 14:52 last edited by
                          #18

                          Hi, All, Another question that is can i distribute all files (e.g. my apps, Qt DLLs) use one package (e.g. one NSIS install package, or one zip/7z/tar.gz package) ?
                          Many thanks!

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                            andre
                            wrote on 20 Dec 2010, 15:21 last edited by
                            #19

                            Sure you can*!

                            *) Opinion of a non-lawer.

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                              Loaden
                              wrote on 29 Dec 2010, 09:22 last edited by
                              #20

                              Change state to SOLVED.
                              Thanks all!

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