macOS Guide for Zinit

This guide covers both building Zinit natively on macOS and cross-compiling from macOS to Linux targets.

Building Zinit Natively on macOS

Zinit can now be built and run directly on macOS. The code has been updated to handle platform-specific differences between Linux and macOS.

Building for macOS

# Build a release version for macOS
make release-macos

# Install to ~/hero/bin (if it exists)
make install-macos

The native macOS build provides most of Zinit's functionality, with the following limitations:

System reboot and shutdown operations are not supported (they will exit the process instead)
Some Linux-specific features are disabled

Cross-Compilation from macOS to Linux

This section outlines the steps to set up your macOS environment for cross-compiling Rust projects to the aarch64-unknown-linux-musl target. This is particularly useful for building binaries that can run on ARM-based Linux systems (e.g., Raspberry Pi, AWS Graviton) using musl libc.

Prerequisites

Homebrew (https://brew.sh/) installed on your macOS system.
Rust and Cargo installed (e.g., via rustup).

Step 1: Install the `aarch64-linux-musl-gcc` Toolchain

The aarch64-linux-musl-gcc toolchain is required for linking when cross-compiling to aarch64-unknown-linux-musl. You can install it using Homebrew:

brew install messense/macos-cross-toolchains/aarch64-linux-musl-cross

Step 2: Link `musl-gcc`

Some build scripts or tools might look for musl-gcc. To ensure compatibility, create a symbolic link:

sudo ln -s /opt/homebrew/bin/aarch64-linux-musl-gcc /opt/homebrew/bin/musl-gcc

You might be prompted for your system password to complete this operation.

Step 3: Add the Rust Target

Add the aarch64-unknown-linux-musl target to your Rust toolchain:

rustup target add aarch64-unknown-linux-musl

Step 4: Build Your Project

Now you can build your Rust project for the aarch64-unknown-linux-musl target using Cargo:

cargo build --release --target aarch64-unknown-linux-musl

Alternatively, if you are using the provided Makefile, you can use the new target:

make release-aarch64-musl

This will produce a release binary located in target/aarch64-unknown-linux-musl/release/.

Step 5: copy to osx hero bin

cp target/aarch64-unknown-linux-musl/release/zinit ~/hero/bin

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