Looking to resolve Qemu on AppleSilicon build failure

[Rainer Müller]

On 18/02/2021 05.23, Joshua Root wrote:
> On 2021-2-18 08:33 , Blake Garner wrote:
>> I have been unsuccessfully trying to figure out how to resolve this issue with
>> qemu builds on AppleSilicon hardware.
>>
>> https://trac.macports.org/ticket/62116 <https://trac.macports.org/ticket/62116>
>>
>> My suspicion is that the build is not using the correct architecture when
>> setting up the include directories for part of the build. This is based on
>> some of the build log output. As noted in the ticket I was able to build qemu
>> on the same system outside of MacPorts so again that points me to some of the
>> configurations in the port.
>>
>> Any suggestions on what to look for here? Seems like I should be able to
>> compare the output of the configure scripts to isolate differences between the
>> working and not working builds?
> 
> Are you building with the same configure args as the port? The --cpu= option is
> the first obvious thing I see that might be relevant. Maybe qemu needs to update
> its config.guess and config.sub, or maybe it just wants you to say "aarch64"
> instead of "arm64".

That's it exactly, QEMU's build system expects this to be --cpu=aarch64.

There is already an open work-in-progress pull request that addresses this,
among other related issues for the Apple M1. It wasn't linked at the Trac ticket
yet, but I added that just now.

https://github.com/macports/macports-ports/pull/9955

Rainer