Add QEMU system

[MementoRC]

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[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/qemu-system/recipe.yaml) and found it was in an excellent condition.

[github-actions]

Hi! This is the staged-recipes linter and your PR looks excellent! 🚀

[MementoRC]

@h-vetinari I finally got the VM emulators working with a cleaner build system (recipe v1 too. It seems that this should be merged into the qemu-execve, or a new single feedstock with a better name be created

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I failed to even lint the recipe, probably because of a conda-smithy bug 😢. This likely indicates a problem in your meta.yaml, though. To get a traceback to help figure out what's going on, install conda-smithy and run conda smithy recipe-lint --conda-forge . from the recipe directory. You can also examine the workflow logs for more detail.

_{This message was generated by GitHub Actions workflow run https://github.com/conda-forge/conda-forge-webservices/actions/runs/22002328304. Examine the logs at this URL for more detail.}

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/qemu-system/recipe.yaml) and found it was in an excellent condition.

[h-vetinari]

@h-vetinari I finally got the VM emulators working with a cleaner build system (recipe v1 too. It seems that this should be merged into the qemu-execve, or a new single feedstock with a better name be created

Wow, this is a big baby, and lots of things going on. I think you'll have to do a little write-up of how this is related to qemu-execve, and how the packaging should look in a perfect world (vs. with the constraints we have). Ideally in an issue on the qemu-execve feedstock.

Being able to emulate win-arm64 would be very cool of course, but downloading stuff on the fly is not great (I get that this is most likely a license issue). Also, why are you downloading stuff from alpine here? Doesn't that potentially cause problems due to different underlying libc?

I haven't looked deeply at this yet, those were just some quick observations from scrolling through. This will need some pretty thorough review, which will take a while (once the PR has converged, I'll ping some more people - I don't want them to get flooded by notifications).

[MementoRC]

@h-vetinari Awesome! and thank you for the quick feedback (I feared an outright rejection ... lol)

• qemu-windows-arm64: The images are huge, as in 4-8GB, also they are Evaluation and expire so not very viable for CF
• alpine is for full VM emulation of a linux-arm64 on OSX/x86_64, kind of an add-on that we could simply remove
• Now, the meat: qemu-execve is not optimal (actually we do not any firmware) and the sysroot is only needed for tests, it is included in this PR, the idea being we would archive the qemu-execve-feedstock and provide the correct qemu-execve in this recipe (I commented it for now)
• The recipe also provides the non 'execve patched' qemu-user

Mainly my intent was to provide the full-QEMU package for you to make a decision as to which one you need for integration into conda-forge (we seem to have hit a snag on the qemu-execve current PR)