solstice-ci/crates/orchestrator/build.rs

fn main() {
    // Only emit link directive for libvirt when building on Linux and the `libvirt` feature is enabled.
    let target_os = std::env::var("CARGO_CFG_TARGET_OS").unwrap_or_default();
    let libvirt_enabled = std::env::var("CARGO_FEATURE_LIBVIRT").is_ok();

    if target_os == "linux" && libvirt_enabled {
        // Ensure the final link includes -lvirt. The virt crate should do this via bindgen/pkg-config,
        // but in some minimal containers the link directive may be missing. This is a safe no-op if
        // already present and fixes undefined references like virConnectOpen, virDomainDefineXML, etc.
        println!("cargo:rustc-link-lib=virt");
        // On Debian/Ubuntu the library resides in /usr/lib/{arch}-linux-gnu which the linker knows.
        // If custom locations are ever needed, also emit cargo:rustc-link-search here.
    }
}