// Tell cargo to look for shared libraries in the specified directory

println!("cargo:rustc-link-search=./bin");

// Tell cargo to tell rustc to link the shared library.

println!("cargo:rustc-link-lib=cronet");

// Tell cargo to invalidate the built crate whenever the bindings change

println!("cargo:rerun-if-changed=bindings.h");

// The bindgen::Builder is the main entry point

// to bindgen, and lets you build up options for

// the resulting bindings.

let bindings = bindgen::Builder::default()

// The input header we would like to generate

// bindings for.

.header("./src/bindings.h")

// Tell cargo to invalidate the built crate whenever any of the

// 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!");