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Building Qt for ARMv6l

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  • G Gutemberg

    @mrjj it does. I have it running from other providers (i.e. www.ekioh.com) and it run just fine. It does all we want. No VFP/FPU and run perfectly on linux framebuffer. The problem is their license model...

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

    @Gutemberg
    ok so u seen a Qt that worked fine on the same spec device?
    Well that should guarantee that u most likely can have the same.
    Do you know if it was Qt 4 or 5?

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    • mrjjM mrjj

      @Gutemberg
      ok so u seen a Qt that worked fine on the same spec device?
      Well that should guarantee that u most likely can have the same.
      Do you know if it was Qt 4 or 5?

      G Offline
      G Offline
      Gutemberg
      wrote on last edited by Gutemberg
      #8

      @mrjj Qt 5.

      Also, its not intended to run full blow websites and neither video or other multimedia content on our device.

      The idea is that application developers can code the apps using modern web frameworks hence why we want a modern web engine. It is just "simple" payment applications with small screens, hence the small resource usage on those "sites".

      mrjjM 1 Reply Last reply
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      • G Gutemberg

        @mrjj Qt 5.

        Also, its not intended to run full blow websites and neither video or other multimedia content on our device.

        The idea is that application developers can code the apps using modern web frameworks hence why we want a modern web engine. It is just "simple" payment applications with small screens, hence the small resource usage on those "sites".

        mrjjM Offline
        mrjjM Offline
        mrjj
        Lifetime Qt Champion
        wrote on last edited by
        #9

        @Gutemberg
        Ok. it sounds reasonable.
        Good luck with it. sounds like interesting project.

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        • mrjjM mrjj

          @Gutemberg
          Ok. it sounds reasonable.
          Good luck with it. sounds like interesting project.

          G Offline
          G Offline
          Gutemberg
          wrote on last edited by
          #10

          @mrjj Thanks... I hope someone can jump in here and bring me help building Qt for it... So far found no concrete document for that. But thanks

          mrjjM 1 Reply Last reply
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          • G Gutemberg

            @mrjj Thanks... I hope someone can jump in here and bring me help building Qt for it... So far found no concrete document for that. But thanks

            mrjjM Offline
            mrjjM Offline
            mrjj
            Lifetime Qt Champion
            wrote on last edited by
            #11

            @Gutemberg
            well its seems to be mutiple disciplines into play as u want a custom Qt with very tight requirements but I bet
            hard work and lots of asking here will enable u to build it.

            Is it for a commercial product line or just a for fun project?

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            • mrjjM mrjj

              @Gutemberg
              well its seems to be mutiple disciplines into play as u want a custom Qt with very tight requirements but I bet
              hard work and lots of asking here will enable u to build it.

              Is it for a commercial product line or just a for fun project?

              G Offline
              G Offline
              Gutemberg
              wrote on last edited by
              #12

              @mrjj It is for a commercial project. At first we are aiming this PAX device since it is the more "flexible" device in the payment industry but we want to get other players supported as well (like Verifone, Ingenico, etc.).

              Like I said, I tried to hire people just to build Qt for the device but no success. I found lots of people that know QML and development FOR Qt but none that actually cross compiled it for an embedded device.

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              • tomasz3dkT Offline
                tomasz3dkT Offline
                tomasz3dk
                wrote on last edited by tomasz3dk
                #13

                Hi. Basically if you want to crosscompile qt you can do this in 2 ways:

                1. If you have a proper toolchain and rootfs with development files, you can download qt sources and crosscompile it. I think that a good point to start is with begginsers guide for raspberry pi. Probably you will have to change some options in qmake.conf for this processor.
                2. Build your own image and sdk with yocto project.

                Qt Company have also Qt for device creation so you can ask them directly about commercial version for this device.
                There are not much information about this device on internet (sdk, linux version etc..) so for now i can't help more.

                G 1 Reply Last reply
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                • tomasz3dkT tomasz3dk

                  Hi. Basically if you want to crosscompile qt you can do this in 2 ways:

                  1. If you have a proper toolchain and rootfs with development files, you can download qt sources and crosscompile it. I think that a good point to start is with begginsers guide for raspberry pi. Probably you will have to change some options in qmake.conf for this processor.
                  2. Build your own image and sdk with yocto project.

                  Qt Company have also Qt for device creation so you can ask them directly about commercial version for this device.
                  There are not much information about this device on internet (sdk, linux version etc..) so for now i can't help more.

                  G Offline
                  G Offline
                  Gutemberg
                  wrote on last edited by Gutemberg
                  #14

                  @tomasz3dk Thanks for get back. We cannot create an image for the device. We can only create applications for it. And yes, we have a toolchain with sysroot here. Tutorials like that one is one of the multiple ones around the web that points to specific PI build. There is no docs or tutorial for general ARM devices.

                  I updated the post with basic information of the device processor.

                  Thanks

                  tomasz3dkT 1 Reply Last reply
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                  • G Gutemberg

                    @tomasz3dk Thanks for get back. We cannot create an image for the device. We can only create applications for it. And yes, we have a toolchain with sysroot here. Tutorials like that one is one of the multiple ones around the web that points to specific PI build. There is no docs or tutorial for general ARM devices.

                    I updated the post with basic information of the device processor.

                    Thanks

                    tomasz3dkT Offline
                    tomasz3dkT Offline
                    tomasz3dk
                    wrote on last edited by
                    #15

                    @Gutemberg I don't see informations about processor in your first post ;)

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                    • tomasz3dkT tomasz3dk

                      @Gutemberg I don't see informations about processor in your first post ;)

                      G Offline
                      G Offline
                      Gutemberg
                      wrote on last edited by
                      #16
                      This post is deleted!
                      mrjjM 1 Reply Last reply
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                      • G Gutemberg

                        This post is deleted!

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by mrjj
                        #17

                        @Gutemberg
                        Hi upload is broken here at forum ;(
                        please use external site and paste link here.

                        G 1 Reply Last reply
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                        • mrjjM mrjj

                          @Gutemberg
                          Hi upload is broken here at forum ;(
                          please use external site and paste link here.

                          G Offline
                          G Offline
                          Gutemberg
                          wrote on last edited by mrjj
                          #18

                          @mrjj thanks!

                          @tomasz3dk here is the CPU info http://imageshack.com/a/img923/9276/3Zl3xf.png

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                          • G Offline
                            G Offline
                            Gutemberg
                            wrote on last edited by
                            #19

                            Ok good news!

                            I got Qt 5.8-beta compiled (didn't tried QtWebkit yet and previous versions don't compile, dunno why)! -> I'll post a complete step-by-step here once I got everything to work.

                            Sent to the device just the libQt5Core and a HelloWorld app that just write a line to the console I built with QtCreator and this is the output:

                            /data/opt/helloconsole $ ./HelloConsole
                            A newer kernel is required to run this binary. (__kernel_cmpxchg64 helper)
                            

                            Any idea on what can be? As the image I posted here, the kernel is 3.0.56...

                            Thanks

                            jsulmJ 1 Reply Last reply
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                            • G Gutemberg

                              Ok good news!

                              I got Qt 5.8-beta compiled (didn't tried QtWebkit yet and previous versions don't compile, dunno why)! -> I'll post a complete step-by-step here once I got everything to work.

                              Sent to the device just the libQt5Core and a HelloWorld app that just write a line to the console I built with QtCreator and this is the output:

                              /data/opt/helloconsole $ ./HelloConsole
                              A newer kernel is required to run this binary. (__kernel_cmpxchg64 helper)
                              

                              Any idea on what can be? As the image I posted here, the kernel is 3.0.56...

                              Thanks

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on last edited by
                              #20

                              @Gutemberg said in Building Qt for ARMv6l:

                              __kernel_cmpxchg64

                              Does this happen with a plain C++ hello world application without Qt?
                              Here something about this issue: http://uhurumkate.blogspot.de/2014/07/a-newer-kernel-is-required-to-run-this.html
                              It should work with kernel >= 3.1

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

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                              • jsulmJ jsulm

                                @Gutemberg said in Building Qt for ARMv6l:

                                __kernel_cmpxchg64

                                Does this happen with a plain C++ hello world application without Qt?
                                Here something about this issue: http://uhurumkate.blogspot.de/2014/07/a-newer-kernel-is-required-to-run-this.html
                                It should work with kernel >= 3.1

                                G Offline
                                G Offline
                                Gutemberg
                                wrote on last edited by
                                #21

                                @jsulm nop, other c++ apps ran just fine on the device. Only with Qt the problem happens...

                                1 Reply Last reply
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                                • G Offline
                                  G Offline
                                  Gutemberg
                                  wrote on last edited by
                                  #22

                                  Hey guys, does anyone has any idea how to workaround this issue (except by upgrading kernel since it is not possible)?

                                  We really want to buy Qt but we are struggling with this major blocker.

                                  Thanks!

                                  jsulmJ 1 Reply Last reply
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                                  • G Gutemberg

                                    Hey guys, does anyone has any idea how to workaround this issue (except by upgrading kernel since it is not possible)?

                                    We really want to buy Qt but we are struggling with this major blocker.

                                    Thanks!

                                    jsulmJ Offline
                                    jsulmJ Offline
                                    jsulm
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #23

                                    @Gutemberg GCC < 4.7 could help. Did you check the link I provided? There are several suggestions which can help:

                                    • Enabling arm v7 hard-float might solve your problem (it solved mine).
                                    • Using -mfpu=vfp and -mfloat-abi=hard might solve your problem (i didn't try as armv7 was desired).

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

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                                    • D Offline
                                      D Offline
                                      dsicari
                                      wrote on last edited by
                                      #24

                                      Hello!! Do you have any news on it? Did you even run sme qt application on S920? If you did, can you tell us about?

                                      thanks!

                                      1 Reply Last reply
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