build.rs

• dynamic library path: cargo:rustc-link-search=native=$PATH

• dynamic library name: cargo:rustc-link-lib=dylib=$NAME

Bindgen

• library path

• wrapper header path

• output binding rust file

    let bindings = bindgen::Builder::default()
        // The input header we would like to generate
        // bindings for.
        .header("wrapper.h")
        .clang_arg("-v")
        .derive_debug(true)
        .derive_default(true)
        // included header files changed.
        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
        // Finish the builder and generate the bindings.
        .generate()
        // Unwrap the Result and panic on failure.
        .expect("Unable to generate bindings");

    // Write the bindings to the $OUT_DIR/bindings.rs file.
    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
    bindings
        .write_to_file(out_path.join("bindings.rs"))
        .expect("Couldn't write bindings!");