Apple Silicon support

[darthdeus]

Bevy version

01ba7c4

Operating system & version

macOS Big Sur 11.0.1

What you did

Ran cargo run --example breakout

What you expected to happen

I expected the example to compile and run.

What actually happened

The example failed to compile with the following error

error: failed to run custom build command for `bevy-glsl-to-spirv v0.2.1`

Caused by:
  process didn't exit successfully: `/Users/darth/projects/bevy/target/debug/build/bevy-glsl-to-spirv-fa67d3095c93334b/build-script-build` (exit code: 101)
  --- stderr
  thread 'main' panicked at 'Missing target support aarch64-apple-darwin', /Users/darth/.cargo/registry/src/gitproxy.zycloud.tk-1ecc6299db9ec823/bevy-glsl-to-spirv-0.2.1/build/build.rs:24:9
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
error: build failed

[cart]

Good to know. We might be able to work around this by using shaderc on the aarch64-app-darwin target (which we already do for ios).

[mockersf]

which can be done around here if someone with a new Mac wants to try (adding the arch at the same place of the iOS target is checked for, and also probably a few changes in the crate too)

[joshuajbouw]

@cart 11.0 Big Sur can be added to the CI as the preview had been added but, I'm not entirely too sure if it actually is compiling to the ARM target or not. It should be able to else ARM chip Apple would've had nothing at launch haha.

Would be a good idea to add that target to shaderc and trying to build an ARM example for Big Sur as a new CI much like Android.

[joshuajbouw]

Update: https://blog.rust-lang.org/2020/11/27/Rustup-1.23.0.html <- M1 support just released it looks like.

Rustup is now natively available for the new Apple M1 devices, allowing you to install it on the new 
Macs the same way you'd install it on other platforms!

Note that at the time of writing this blog post the aarch64-apple-darwin compiler is at Tier 2 target: 
precompiled binaries are available starting from Rust 1.49 (currently in the beta channel), but no 
automated tests are executed on them.

Looks like you must compile with the Beta channel 1.49.

[frewsxcv]

I opened a pull request that enables shaderc for Apple Silicon targets. All we need besides that is a new version of winit published! rust-windowing/winit#1789

[frewsxcv]

#1027 has merged. Now we wait for rust-windowing/winit#1793

[frewsxcv]

Alright, this should be the last pull request needed for Apple Silicon support: #1043

[cart]

Great work everyone!

[enfipy]

Recently, I've got an m1 mac and tried to build some bevy examples. Got shaderc errors while compiled bevy.