Ship binaries for Apple Silicon Macs (aarch64-apple-darwin)

[TDHolmes]

I tried setting up my new Mac with rust-analyzer and got an error that binaries aren't shipped for this architecture. Makes sense as it's so new, but getting support for this would be great.

[kiljacken]

The limitations mentioned in #5256 are still in effect. Until GitHub actions provides a runner for your specific platform, we're unable to provide nightly builds for that platform. Please use the rustup component instead.

[lnicola]

Note that the rustup component isn't always up-to-date. I'd recommend building from source.

[TDHolmes]

Yeah I've installed from source in the meantime. I would assume GitHub actions will eventually support this, so can we keep this open until that happens?

[jonas-schievink]

How hard is it to cross-compile for this target from x86_64 macOS? If it's just one rustup target add away we can consider it.

[TDHolmes]

Just tried this on my intel Mac and it compiled on nightly with

rustup target add aarch64-apple-darwin
cargo build --target aarch64-apple-darwin

so looks like it is that simple!

[richiksc]

rustup v1.23.0 has native suport for aarch64-apple-darwin, and you can add the target as long as you're on beta or nightly Rust v1.49.0. It's super easy to cross compile if you're using Big Sur, and if you're using older versions of macOS you just need to have Xcode 12 command line tools and the macOS 11 SDK installed and set some environment variables.

Here are the instructions for cross-compilation from one of the maintainers of Rust, @shepmaster:
https://github.com/shepmaster/rust/blob/silicon/silicon/README.md

Here's the tracking issue for Apple Silicon support:
rust-lang/rust#73908

Rust for aarch64-apple-darwin is a Tier 2 target and in beta, but it seems to work pretty well. The only reason it's not Tier 1 yet is the lack of availability of CI hardware for running the test suite.

[richiksc]

The limitations mentioned in #5256 are still in effect. Until GitHub actions provides a runner for your specific platform, we're unable to provide nightly builds for that platform. Please use the rustup component instead.

@kiljacken What's the update on this, given that GitHub Actions now has macosx11.0 runners, and Rust beta and nightly support native cross-compilation for aarch64-apple-darwin on macOS?

[bjorn3]

While cross-compilation to ARM macOS is supported by rustc, there is currently no way to run the tests on ARM as Github actions doesn't yet have a runner for this.

[lnicola]

I think building binaries but not running tests is a reasonable compromise since most of RA is platform-independent anyway.

[richiksc]

I think building binaries but not running tests is a reasonable compromise since most of RA is platform-independent anyway.

You could always mark it as a "Tier 2" platform until you can run tests. Shipping binaries, even ones that might be unstable, is still better than no support at all.

[phungleson]

Hi everyone, sorry, it is still not clear for me on how to use rust-analyzer with aarch64.

I tried to checked out the project, and run

cargo build --target aarch64-apple-darwin --release

Then I copied ./target/release/rust-analyzer to my ~/.cargo/bin but when I launch vs code it still shows me this message

Bootstrap error [Error: Rust Analyzer Language Server is not available. Please, ensure its [proper installation

What else do I need to do to start using this? Thanks in advance, cheers.

[phungleson]

Ok after debugging a while looks like we need to change this line https://github.com/rust-analyzer/rust-analyzer/blob/c3d21ea05a1d1e1a88a983773fd821f6f6470264/editors/code/src/main.ts#L291

to something like:

if (process.arch === "x64" || process.arch === "ia32" || process.arch === "arm64") {

Do you want me to make a PR for this?

[TDHolmes]

@phungleson all I did was cargo xtask install when compiling from my M1 device. No code modification was needed for me.

[phungleson]

Thanks @TDHolmes I am running code in arm mode so it might be the difference?