Setup osxcross

Github Action for setting up osxcross in a github action.

Sources & Shoutouts

• Thank you to James Waples for posting this article!

Usage

# Checkout your code
- name: Clone your Code
  uses: actions/checkout@v7

# Install the apple-darwin rust targets you need.
- name: Install Rust targets
  run: rustup target add x86_64-apple-darwin aarch64-apple-darwin

# Use this action
- uses: mbround18/setup-osxcross@v3
  # This builds executables & sets env variables for rust to consume.
  with:
    osx-version: "12.3"

# Build your code for apple-darwin based release
- name: Build Your Code (Intel)
  run: cargo build --release --target x86_64-apple-darwin

- name: Build Your Code (Apple Silicon)
  run: cargo build --release --target aarch64-apple-darwin

osx-version must point at an SDK that includes arm64 slices (macOS 11.0+, e.g. 12.3) for the aarch64-apple-darwin target to be configured. Older SDKs will only get x86_64-apple-darwin, and the action will log a notice rather than failing.

ZLIB and C/++ compilations

If you run into issues were you have zlib or have c as a dependenacy consider setting the following in your env.

# Make libz-sys (git2-rs -> libgit2-sys -> libz-sys) build as a statically linked lib
# This prevents the host zlib from being linked
export LIBZ_SYS_STATIC=1

# Use Clang for C/C++ builds
export CC=o64-clang
export CXX=o64-clang++

AR_x86_64_apple_darwin / AR_aarch64_apple_darwin are set automatically for you, so cc/cc-rs based builds pick up the right ar without extra configuration.