build.rs

fn main() {
    #[cfg(feature = "cpp")]
    {
        use std::path::Path;

        assert!(
            Path::new("cpp/CMakeLists.txt").exists(),
            "FastPFOR submodule not initialized. Run `git submodule update --init`."
        );

        // Compile FastPFOR using CMake
        println!("cargo:rerun-if-changed=cpp");
        let lib_path = cmake::Config::new("cpp")
            .define("WITH_TEST", "OFF")
            .build()
            .join("lib");
        let lib_path = lib_path.to_str().unwrap();

        // Compile the bridge
        println!("cargo:rerun-if-changed=src/cpp/fastpfor_bridge.h");
        println!("cargo:rerun-if-changed=src/cpp/mod.rs");
        cxx_build::bridge("src/cpp/mod.rs")
            .include("cpp/headers")
            .include("src/cpp")
            .std("c++14")
            .compile("fastpfor_bridge");

        // Link the FastPFOR library - must be done after the bridge is compiled
        println!("cargo:rustc-link-search=native={lib_path}");
        println!("cargo:rustc-link-lib=static=FastPFOR");
    }
}