fn main() {
    let manifest_dir = std::path::PathBuf::from(std::env::var("CARGO_MANIFEST_DIR").unwrap());
    let header_dir = manifest_dir.parent().unwrap().join("client-ffi");

    // alice_bob_test.c contains both the delivery implementation (queue +
    // callback) and the test logic.  It has no direct references to Rust
    // symbols; all protocol calls go through the ClientOps vtable supplied
    // by the Rust harness.
    cc::Build::new()
        .file("c/alice_bob_test.c")
        .include(&header_dir)
        .compile("c_alice_bob");

    println!("cargo:rerun-if-changed=c/alice_bob_test.c");
    println!("cargo:rerun-if-changed=c/delivery.c");
    println!("cargo:rerun-if-changed=build.rs");
}