fn main() {
    // The prebuilt libwebrtc (pulled by webrtc-sys) ships Objective-C categories in a
    // static library — e.g. the NSString/abseil-string-view bridge used by the macOS
    // video-encoder factory. Without `-ObjC`, the linker drops those category object
    // files, so their selectors are never registered and the first call crashes with
    // `unrecognized selector +[NSString stringForAbslStringView:]` while building the
    // PeerConnectionFactory. Force-load ObjC members from the static libs to fix it.
    let macos = std::env::var("CARGO_CFG_TARGET_OS").as_deref() == Ok("macos");
    let livekit = std::env::var("CARGO_FEATURE_LIVEKIT").is_ok();
    if macos && livekit {
        println!("cargo:rustc-link-arg=-ObjC");
    }
}