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Qt MinGW 64-bit

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  • mrjjM Offline
    mrjjM Offline
    mrjj
    Lifetime Qt Champion
    wrote on last edited by mrjj
    #4

    well they also stopped making a 32 bit linux. It all depends on download stats
    etc and the huge cost of making pre-compiled.

    mingw is always treated a bit as the stepchild (from all)
    as most projects is using visual studio and its de facto standard for windows development.
    Also the new web engine stuff is NOT supported in mingw.

    So it makes more sense to focus on 32/64 for VS for PRO development and
    mingw for the more casual and works out of the box experience.

    But yes, it might come. Like 32 out and only 64 bit.
    Most new windows are 64 bit and xp is finally dying.

    satysinS 1 Reply Last reply
    1
    • satysinS satysin

      @koahnig

      Thank you for the warm welcome :)

      Yeah I am using the 32-bit build which is fine for now but I just found it a little strange that in 2017 they still don't provide an official 64-bit build for MinGW when they do for MSVC.

      Would be great if Digia could provide one in the future, perhaps for Qt 5.8?

      K Offline
      K Offline
      koahnig
      wrote on last edited by
      #5

      @satysin

      I do not know anything about the release plans for a 64 bit version.
      I believe the choices for 64 bits are too many. I think there has been an extended discussion in the past.

      From development point I was not convinced that it is a good idea to continue with 64 bit MinGW version. I was a bit surprised when I had noticed that at that time it was slower especially when debugging. However, that have been because of machine limitations. The debug versions were relatively large. Presumably I could tweak the parameters for speeding up. Anyway, as long as I do not see a real need, it does not make sense to switch for me.

      Vote the answer(s) that helped you to solve your issue(s)

      1 Reply Last reply
      1
      • mrjjM mrjj

        well they also stopped making a 32 bit linux. It all depends on download stats
        etc and the huge cost of making pre-compiled.

        mingw is always treated a bit as the stepchild (from all)
        as most projects is using visual studio and its de facto standard for windows development.
        Also the new web engine stuff is NOT supported in mingw.

        So it makes more sense to focus on 32/64 for VS for PRO development and
        mingw for the more casual and works out of the box experience.

        But yes, it might come. Like 32 out and only 64 bit.
        Most new windows are 64 bit and xp is finally dying.

        satysinS Offline
        satysinS Offline
        satysin
        wrote on last edited by
        #6

        @mrjj Yes I guess I should just go with MSVC then. I have Visual Studio 2017 RC installed but currently the Qt installer does not detect it, I assume this is because they do not have a Qt build for it yet.

        mrjjM K 2 Replies Last reply
        0
        • satysinS satysin

          @mrjj Yes I guess I should just go with MSVC then. I have Visual Studio 2017 RC installed but currently the Qt installer does not detect it, I assume this is because they do not have a Qt build for it yet.

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by mrjj
          #7

          @satysin

          Yes. The Qt must match the VS version. ( due to DLL loading)
          I think VS2015 is the newest. ( didnt check)

          Its not very hard to compile qt with minge 64 but it does take long time.

          1 Reply Last reply
          1
          • satysinS satysin

            @mrjj Yes I guess I should just go with MSVC then. I have Visual Studio 2017 RC installed but currently the Qt installer does not detect it, I assume this is because they do not have a Qt build for it yet.

            K Offline
            K Offline
            koahnig
            wrote on last edited by
            #8

            @satysin

            When go MSVC, make sure that can install a compatible, pre-compiled version of Qt libs. Otherwise you have to do a compilation yourself as well.

            Vote the answer(s) that helped you to solve your issue(s)

            1 Reply Last reply
            1
            • satysinS Offline
              satysinS Offline
              satysin
              wrote on last edited by
              #9

              Thank you all. I have marked as solved.

              1 Reply Last reply
              0
              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #10

                Hi and welcome to devnet,

                Certainly not with 5.8. However there was a thread talking about that here.

                As to why there was not yet a MinGW64, the answer is always the same: it's about manpower and hardware.

                The CI has its limits and is already under heavy pressure building Qt for the 5.6 to 5.8 branches as well as dev. Each pre-built package is also tested. For Windows alone it means 5 different versions to generate and test.

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

                satysinS 1 Reply Last reply
                1
                • SGaistS SGaist

                  Hi and welcome to devnet,

                  Certainly not with 5.8. However there was a thread talking about that here.

                  As to why there was not yet a MinGW64, the answer is always the same: it's about manpower and hardware.

                  The CI has its limits and is already under heavy pressure building Qt for the 5.6 to 5.8 branches as well as dev. Each pre-built package is also tested. For Windows alone it means 5 different versions to generate and test.

                  satysinS Offline
                  satysinS Offline
                  satysin
                  wrote on last edited by satysin
                  #11

                  @SGaist Yes I can understand the difficulties in supporting yet another build. Also with MSVC now being "free" for open source projects (with Visual Studio Community) I guess it means MinGW will see a drop in users going forward.

                  1 Reply Last reply
                  0
                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #12

                    Not necessarily, some people prefer to stay with OpenSource Tools and keep the same compiler as much as possible.

                    Also, to get started with Qt on Windows, the MinGW build is ideal since it doesn't require to go somewhere else for additional downloads and setup like Visual Studio does. You just have to select MinGW in the additional software in the installer. Furthermore, it's only been recently that the C++ tools can be downloaded independently, otherwise you had to install the whole of VS just to get the compiler and you also need to install the debugging tools separately. And by whole of VS, you also have to be sure to check C++ otherwise it's installed without it.

                    And from a compatibility point of view, the various versions of VS are not compatible with each others so you always have to ensure that you have all C++ dependencies built correctly.

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

                    1 Reply Last reply
                    0
                    • Y Offline
                      Y Offline
                      yigene
                      wrote on last edited by
                      #13

                      32bit could crash when it reach to 4GB memory right

                      don't like that as we have some vendor products which is 32bit and then the process crash when it reach to 4GB memory!

                      mrjjM jsulmJ 2 Replies Last reply
                      0
                      • Y yigene

                        32bit could crash when it reach to 4GB memory right

                        don't like that as we have some vendor products which is 32bit and then the process crash when it reach to 4GB memory!

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by
                        #14

                        @yigene

                        Well anything can crash when it runs out of memory
                        and the app is not programmed correctly to handle it.
                        So if you run a 64 bit app on 32 bit OS with 1 GB ram it could just as easy crash as 32 bit version.

                        1 Reply Last reply
                        0
                        • Y yigene

                          32bit could crash when it reach to 4GB memory right

                          don't like that as we have some vendor products which is 32bit and then the process crash when it reach to 4GB memory!

                          jsulmJ Online
                          jsulmJ Online
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #15

                          @yigene To add to @mrjj : does your app need that amount of memory? If not and it does not have memory leaks than there is no real reason to have it as 64bit.

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

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