Build fails on Apple Silicon

[MaxDesiatov]

Steps to reproduce:

1. Install the Apple Silicon build of Rust with rustup

arch --x86_64 \      
sh <(curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs) \
--default-host aarch64-apple-darwin \
--default-toolchain nightly

2. Build sccache from source with cargo install sccache

The build fails with this error:

error: failed to run custom build command for `byteorder v1.3.4`

Caused by:
  process didn't exit successfully: `/var/folders/k3/81_y5ms54793cngfpdw7_7d40000gn/T/cargo-installRR4GjT/release/build/byteorder-a8c8926e64734017/build-script-build` (signal: 9, SIGKILL: kill)
warning: build failed, waiting for other jobs to finish...
error: failed to compile `sccache v0.2.13`, intermediate artifacts can be found at `/var/folders/k3/81_y5ms54793cngfpdw7_7d40000gn/T/cargo-installRR4GjT`

[luser]

Sounds like this needs to be filed on the byteorder crate, although it might be the case that we need to wait for upstream Rust to ship support for Apple silicon to really be useful. Are you just running the x86 rustc toolchain under emulation?

[MaxDesiatov]

I don't think rustc runs here under emulation. As far as I understand arch --x86_64 is only applied to rustup, which itself isn't available natively yet, but the nightly toolchain should be native? I will double check.

[glandium]

There's an issue with code signing when going from x86_64 processes to arm64 processes. This will keep happening until rustup itself is arm64 native. A workaround is to use RUSTC=$(rustup which rustc) $(rustup which cargo) install sccache.

Note this is not specific to sccache at all. This happens with essentially everything.

[MaxDesiatov]

Thanks for the clarification!