extern crate cc;

fn main() {
    let module =
        if cfg!(feature = "iter") {
            "src/mod_iter.c"
        } else if cfg!(feature = "rec") {
            "src/mod_rec.c"
        } else {
            panic!("unknown module type")
        };
    cc::Build::new()
        .file(module)
        .shared_flag(true)
        .compile("mod.a");
}