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From: Pablo Rogina <pablojr@gmail.com>
Date: Fri, 17 May 2019 10:58:42 -0300
Message-ID: <CAL5OxRsPov69YW398joZ7AJJmpf_-PTxM1NFBFUO3+sLuQ2LAg@mail.gmail.com>
Subject: Re: [alpine-devel] How to Qt 5 packages are built for architecture
 aarch64 (i.e. Raspberry Pi 3)
To: Alpine-devel <alpine-devel@lists.alpinelinux.org>
Content-Type: text/plain; charset="UTF-8"
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Guys, thank you very much for the tips and details about packages
building approach for RPi devices.

I'm not sure I have enough spare time but I might give the qemu based
scenario a try.

Regards. Pablo

On Mon, May 6, 2019 at 4:06 PM Milan P. Stani=C4=87 <mps@arvanta.net> wrote=
:
>
> Hi,
>
> On Mon, 2019-05-06 at 11:40, Pablo Rogina wrote:
> > Hi Milan, thank you for your reply.
> > > Alpine build packages native, i.e. not cross build.
> > > Although it is not RPi3 for aarch64 but some more powerful ARM64
> > > machines.
> > Given I don't have "more powerful ARM64 machines" at hand:
> > 1. could it be possible to cross-compile those packages under a X86_64
> > machine using the Linario binary toolchain [1]?
> > 2 do I need to do something special because musl library?
> >
> > [1] https://releases.linaro.org/components/toolchain/binaries/7.4-2019.=
02/aarch64-linux-gnu/
>
> Sorry if was not more clear answering your question. I thought you ask
> how Alpine builds packages.
>
> Of course, you can build them on RPi3 or other smaller boxes and (as
> Rasmus wrote in response to you) under qemu.
> Personally I built a lot of them on small ARM SBC's with 1GB RAM, one or
> two CPU's and filesystem on SD cards. For smaller packages it works fine
> although not fine as on big boxes.
>
> Big packages require more RAM and some tweaks. For example I've built
> llvm, rust lang, crystal lang, firefox and some other on ARM64 with 4GB
> RAM with help form zram swap and stopping all other processes (Xwin and
> similar) and build set to just one job (i.e. not paralel, 'make -j1').
> It is slow for such big packages but it works, and slowness is mostly
> becuase filesystem is on SD cards. I tried also with SSD attached over
> USB-C and then it is somewhat faster.
>
> Now I have both arm machines (arm32 and arm64) with 4GB and eMMC cards
> so it is easier for me, but remember when I built most of them under
> qemu.
>
> --
> regards
>
>
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