Building RTEMS toolchain on Aarch64 fails on expat

[Joel Sherrill]

On Thu, Oct 14, 2021, 11:18 AM Alan Cudmore <alan.cudmore at gmail.com> wrote:

> On Thu, Oct 14, 2021 at 11:39 AM Joel Sherrill <joel at rtems.org> wrote:
> >
> > On Thu, Oct 14, 2021 at 10:18 AM Alan Cudmore <alan.cudmore at gmail.com>
> wrote:
> > >
> > > Hi,
> > > I tried to use the RSB master branch to build an RTEMS 6 toolchain on
> > > a Raspberry Pi 4 running Ubuntu 20.04 64 bit (Aarch64).
> > > It fails on expat-2.1.0, with the log saying that expat does not
> > > recognize Aarch64.
> > > The expat package on the Ubuntu distribution is 2.2.10.
> > > Would this be as simple as upgrading the expat version in RSB?
> >
> > It should be unless Ubuntu has patches to add aarch64 as recognized.
> >
> > Change the version and the hash and give it a spin.
>
> Doing that now - It's past the expat build, but it will take a while
> to build the entire toolchain on an SD card :)
>

I bet it is still faster than when you built the sparc tools on a Pi and
ran some tests. :)


> >
> > FYI rtems-tools needs updating to bump the has to something recent
> > enough to get the aarch64 kcu105_qemu tester configuration and a
> > number of Coverity fixes. It's in Alex's queue.
> >
> > >
> > > I know that building a toolchain on a Raspberry Pi is not the most
> > > common use case, but with the M1 Macs I think this will start to
> > > become a more widely used development platform.
> >
> > No reason it shouldn't work. You are right that it will start to
> > become more used. I saw some graphic that Apple will sell
> > 80% of ARM based laptops. My first thought was "what are the
> > other 20%?" :)
>
> Probably refers to Chromebooks and Windows ARM devices like the
> Microsoft SQ1 processor. We have a Mac with a M1 CPU.. Eventually I'll
> have to try to generate an RTEMS toolchain on it.
>

That has to be it although I think there are some low volume Linux arm
notebooks.

Personally I would just like an affordable replacement for my Android
tablet that has a faster CPU, more ram, etc and isn't wifi only. The 5G
ones are expensive to me and the cheaper ones are wifi only or not
substantially better than what I have.

>
> Alan
>
> >
> > --joel
> > >
> > > Thanks,
> > > Alan
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>