build-2.rs

extern crate bindgen;

fn main() {
    // Generates Rust FFI bindings.
    let bindings = bindgen::Builder::default()
        // The input header we would like to generate
        // bindings for.
        .header("src/bridge.h")
        // Finish the builder and generate the bindings.
        .generate()
        // Unwrap the Result and panic on failure.
        .expect("Unable to generate bindings");

    bindings
        .write_to_file("src/bridge.rs")
        .expect("Couldn't write bindings!");
}