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## Overview

These rules are for using [Bindgen][bindgen] to generate [Rust][rust] bindings to C (and some C++) libraries.

[rust]: http://www.rust-lang.org/
[bindgen]: https://github.com/rust-lang/rust-bindgen

See the [bindgen example](https://github.com/bazelbuild/rules_rust/tree/main/examples/ffi/rust_calling_c/simple/BUILD.bazel#L9) for a more complete example of use.

### Setup

To use the Rust bindgen rules, add the following to your `WORKSPACE` file to add the
external repositories for the Rust bindgen toolchain (in addition to the [rust rules setup](https://bazelbuild.github.io/rules_rust/#setup)):

```python
load("@rules_rust//bindgen:repositories.bzl", "rust_bindgen_dependencies", "rust_bindgen_register_toolchains")

rust_bindgen_dependencies()

rust_bindgen_register_toolchains()
```

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