[3.14] gh-138171: Migrate iOS testbed location and add Apple build script (#138176)

[freakboy3742]

Adds tooling to generate and test an iOS XCframework, in a way that will also facilitate adding other XCframework targets for other Apple platforms (tvOS, watchOS, visionOS and even macOS, potentially).

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Co-authored-by: Hugo van Kemenade 1324225+hugovk@users.noreply.github.com

(cherry picked from commit 35c7e52)

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This doesn't alter anything in the operation of iOS; it moves the location of the testbed, and adds the tooling to coordinate XCframework builds. This will potentially allow for a binary release in a 3.14 point release; but at the very least, will make back porting efforts easier in the meantime.

• Issue: Add mechanism for building iOS XCframeworks #138171

[freakboy3742]

!buildbot iOS

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @freakboy3742 for commit 659cb85 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F139204%2Fmerge

The command will test the builders whose names match following regular expression: iOS

The builders matched are:

• iOS ARM64 Simulator PR

[freakboy3742]

Tagging @hugovk following our discussion at PyCon UK, for consideration in 3.14.0 final.

[ned-deily]

Looks like the original binary stubs in iOS/Resources/bin remain in the repo after this PR; this is also the case in main. I assume the whole iOS directory should be removed. If so, suggest to do that in a separate PR for main and backport that to 3.14 after this PR is merged.

Otherwise LGTM. I successfully built and ran the testsuite using ./Apple with Xcode 26 on macOS 26.0 running on an Apple Silicon Mac and on macOS 15.6.1 running on an Intel Mac.

[freakboy3742]

Looks like the original binary stubs in iOS/Resources/bin remain in the repo after this PR; this is also the case in main. I assume the whole iOS directory should be removed. If so, suggest to do that in a separate PR for main and backport that to 3.14 after this PR is merged.

We will also need a tweak to the buildbots to allow for differentiating build instructions for PR builds based on branch; however, speaking with @ambv at the sprint last week, he indicated this is something that has been on the wishlist for a while. If we can fix that, then we can modify the buildbot to have a different instruction set for 3.14+ and 3.13 PRs, and then delete the iOS directory from both the 3.14 and main branches.

[AA-Turner]

Was closing this PR intended?

A

[freakboy3742]

@AA-Turner Ooops - it was not. Collateral damage of some over-aggressive branch housekeeping on my repo fork.