rust/compiler/rustc_target
Matthias Krüger 5fd6218d72
Rollup merge of #131016 - madsmtm:no-sdk-version-in-object, r=jieyouxu
Apple: Do not specify an SDK version in `rlib` object files

This was added in https://github.com/rust-lang/rust/pull/114114, but is unnecessary, since it ends up being overwritten when linking anyhow, and it feels wrong to embed some arbitrary SDK version in here. The object files produced by LLVM also do not set this, and the tooling shows `n/a` when it's `0`, so it seems to genuinely be optional in object files.

I've also added a test for the different places the SDK version shows up, and documented a bit more in the code how SDK versions work.

See https://github.com/rust-lang/rust/issues/129432 for the bigger picture.

Tested with (excludes the same few targets as in https://github.com/rust-lang/rust/pull/130435):
```console
./x test tests/run-make/apple-sdk-version --target aarch64-apple-darwin,aarch64-apple-ios,aarch64-apple-ios-macabi,aarch64-apple-ios-sim,aarch64-apple-tvos,aarch64-apple-tvos-sim,aarch64-apple-visionos,aarch64-apple-visionos-sim,aarch64-apple-watchos,aarch64-apple-watchos-sim,arm64_32-apple-watchos,armv7k-apple-watchos,armv7s-apple-ios,x86_64-apple-darwin,x86_64-apple-ios,x86_64-apple-ios-macabi,x86_64-apple-tvos,x86_64-apple-watchos-sim,x86_64h-apple-darwin
IPHONEOS_DEPLOYMENT_TARGET=10.0 ./x test tests/run-make/apple-sdk-version --target=i386-apple-ios
```

CC `@BlackHoleFox,` you [originally commented on these values](https://github.com/rust-lang/rust/pull/114114#discussion_r1300599445).

`@rustbot` label O-apple
2024-10-02 17:10:43 +02:00
..
src Rollup merge of #131016 - madsmtm:no-sdk-version-in-object, r=jieyouxu 2024-10-02 17:10:43 +02:00
Cargo.toml dedup object 2024-07-28 17:21:07 +03:00
README.md Fix outdated crate names in compiler docs 2021-04-08 11:12:14 -05:00

rustc_target contains some very low-level details that are specific to different compilation targets and so forth.

For more information about how rustc works, see the rustc dev guide.