fn main() {
    println!("cargo:rustc-link-lib=pam");

    // Emit AHFAIL_INSTALL_DIR so DEFAULT_PATH in lib.rs is correct on multiarch Linux
    // (e.g. /usr/lib/x86_64-linux-gnu) and on Apple Silicon macOS (/opt/homebrew/lib).
    // Meson passes AHFAIL_LIBDIR=<libdir> when building; fall back per platform otherwise.
    let target_os = std::env::var("CARGO_CFG_TARGET_OS").unwrap_or_default();
    let fallback = if target_os == "macos" { "/usr/local/lib" } else { "/usr/lib" };
    let libdir = std::env::var("AHFAIL_LIBDIR").unwrap_or_else(|_| fallback.to_string());
    println!("cargo:rustc-env=AHFAIL_INSTALL_DIR={}/ahfail", libdir);
}