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ci: Native ARM64 jobs #1163

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ci: Native ARM64 jobs #1163

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real-or-random
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@real-or-random real-or-random linked an issue Nov 29, 2022 that may be closed by this pull request
More ARM Linux builds, fewer MacOS builds #1153
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CI even fails to start:

     Error while loading tasks: UNIMPLEMENTED: Dockerfile as CI environment is not yet supported for Arm containers!!

(https://cirrus-ci.com/build/4859893270708224).

So this is going to be much more difficult, closing for now...

@real-or-random real-or-random marked this pull request as ready for review June 28, 2023 15:45
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Let's see what CI is doing here after support for Dockerfile CI on ARM has been added. #1153 (comment)

@real-or-random real-or-random marked this pull request as draft June 28, 2023 15:48
@real-or-random real-or-random mentioned this pull request Jun 29, 2023
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real-or-random commented Jun 30, 2023 •
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Okay, so ARM64 builds work!

But ARM32 builds do not run. I tried to play around with this a bit using the Cirrus CI terminal, and I can't make it work. Giving up for now, but here are some notes:

  • Error message was Cannot execute binary file: Exec format error
  • This indicates that the CPU simply does not support AArch32.
  • Indeed, not all ARM64 CPUs are backwards-compatible, but the one the task was running on is a Neoverse N1 and that one has AArch32 support. (https://developer.arm.com/documentation/100616/0301/functional-description/introduction/features)
  • We need CONFIG_COMPAT in the kernel, but this was set.
  • I've seen suggestions to use setarch linux32 -B [cmd] to run binaries, but this not possible from within unprivileged Docker...

I'll rework this to use only ARM64 then.

@real-or-random real-or-random mentioned this pull request Aug 15, 2023
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I'm currently looking into this.

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maflcko commented Oct 1, 2023

I think this can be closed now?

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More ARM Linux builds, fewer MacOS builds
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