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Building Qt for ARMv6l

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  • mrjjM mrjj

    @Gutemberg
    Yes that a bit odd. I wonder if the 百富产品 play a part.

    Sadly Im not into arm. However I briefly discussed the case with our
    local Qt Champion and he expressed concern if the device has enough horsepower
    to handle webkit. (64 MB ram is not much). Just wanted to mention it.

    G Offline
    G Offline
    Gutemberg
    wrote on last edited by
    #6

    @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 1 Reply Last reply
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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
                              1
                              • 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...

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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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