cargo-zigbuild 0.8.8

Compile Cargo project with zig as linker
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# cargo-zigbuild

[![CI](https://github.com/messense/cargo-zigbuild/workflows/CI/badge.svg)](https://github.com/messense/cargo-zigbuild/actions?query=workflow%3ACI)
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Compile Cargo project with [zig as linker](https://andrewkelley.me/post/zig-cc-powerful-drop-in-replacement-gcc-clang.html) for [easier cross compiling](https://actually.fyi/posts/zig-makes-rust-cross-compilation-just-work/).

## Installation

```bash
cargo install cargo-zigbuild
```

You can also install it using pip which will also install [`ziglang`](https://pypi.org/project/ziglang/) automatically:

```bash
pip install cargo-zigbuild
```

We also provide a [Docker image](https://hub.docker.com/r/messense/cargo-zigbuild) which has macOS SDK pre-installed in addition to cargo-zigbuild and Rust,
for example to build for x86_64 macOS:

```bash
docker run --rm -it -v $(pwd):/io -w /io messense/cargo-zigbuild \
  cargo zigbuild --release --target x86_64-apple-darwin
```

## Usage

1. Install [zig](https://ziglang.org/) following the [official documentation](https://ziglang.org/learn/getting-started/#installing-zig),
on macOS, Windows and Linux you can also install zig from PyPI via `pip3 install ziglang`
2. Install Rust target via rustup, for example, `rustup target add aarch64-unknown-linux-gnu`
3. Run `cargo zigbuild`, for example, `cargo zigbuild --target aarch64-unknown-linux-gnu`

### Specify glibc version

`cargo zigbuild` supports passing glibc version in `--target` option, for example,
to compile for glibc 2.17 with the `aarch64-unknown-linux-gnu` target:

```bash
cargo zigbuild --target aarch64-unknown-linux-gnu.2.17
```

## Caveats

1. Currently only Linux, macOS and Windows gnu targets are supported,
   other target platforms can be added if you can make it work,
   pull requests are welcome.
2. Only current Rust **stable** and **nightly** versions are regularly tested on CI, other versions may not work.

Known upstream zig [issues](https://github.com/ziglang/zig/labels/zig%20cc):

1. [zig cc: parse `-target` and `-mcpu`/`-march`/`-mtune` flags according to clang](https://github.com/ziglang/zig/issues/4911):
   Some Rust targets aren't recognized by `zig cc`, for example `armv7-unknown-linux-gnueabihf`
2. [glibc 2.27 or older: fcntl64 not found, but zig's glibc headers refer it](https://github.com/ziglang/zig/issues/9485)

## License

This work is released under the MIT license. A copy of the license is provided
in the [LICENSE](./LICENSE) file.