I don't have an Apple Watch from that generation at hand to test this myself (series 1 to 3), and I don't think it will be sufficient to test it in the simulator (as it's architecture-specific), so maybe someone else could do so?
N.B. The code is written in a way to support 32-bit iOS and tvOS ARM devices (which do use SjLj) for future compatibility even though we currently only have a target for 32-bit iOS ARM (if you think that's excessive, then I'll change it).
dtolnay
commented
1 week ago 
bors
This PR is identical to https://github.com/rust-lang/rust/pull/124494, which was approved and merged but then removed from master by a force-push due to a CI bug.
r? Mark-Simulacrum
Original PR description:
Found while doing https://github.com/rust-lang/rust/pull/124491, I wanted to unify the code under
target_vendor = "apple", and found that Clang actually specifies that watchOS ARM 32-bit does not use SjLj.I don't have an Apple Watch from that generation at hand to test this myself (series 1 to 3), and I don't think it will be sufficient to test it in the simulator (as it's architecture-specific), so maybe someone else could do so?
N.B. The code is written in a way to support 32-bit iOS and tvOS ARM devices (which do use SjLj) for future compatibility even though we currently only have a target for 32-bit iOS ARM (if you think that's excessive, then I'll change it).
@rustbot label O-watchos