This is a docker image that contains an environment for cross-compiling Rust projects to the following platforms:

• aarch64-unknown-linux-gnu
• x86_64-unknown-linux-gnu
• powerpc64le-unknown-linux-gnu
• x86_64-apple-darwin
• aarch64-apple-darwin

To use it:

docker run --mount type=bind,source="$(pwd)",target=/mnt ghcr.io/martint/rustxc:latest \
    cargo build \
      --target powerpc64le-unknown-linux-gnu \
      --target x86_64-unknown-linux-gnu \
      --target aarch64-unknown-linux-gnu \
      --target x86_64-apple-darwin \
      --target aarch64-apple-darwin

To build the image locally:

docker build . -t rustxc

To rebuild and publish the image manually, open the repository's Actions tab, select Docker (manual), and click Run workflow. The workflow must first be merged into the default branch. You can also trigger it with the GitHub CLI:

gh workflow run docker-publish-manual.yml --ref master

Each manual build pulls fresh base images to update the Rust toolchain, builds for AMD64 and ARM64, and publishes to ghcr.io/martint/rustxc:latest.

Resources

• https://github.com/tpoechtrager/osxcross
• https://dev.to/mbround18/rust-cross-compiling-from-linux-to-mac-on-github-actions-2mj8
• https://github.com/mbround18/setup-osxcross/blob/main/action.yml
• https://burgers.io/cross-compile-rust-from-arm-to-x86-64
• https://stackoverflow.com/questions/41761485/how-to-cross-compile-from-mac-to-linux
• https://github.com/messense/homebrew-macos-cross-toolchains