use std::env::var; fn main() { #[cfg(feature = "user")] { if var("TARGET").map( |t| t == "x86_64-pc-windows-gnu" || t == "i686-pc-windows-gnu" ).unwrap_or(false) { if var("WINAPI_NO_BUNDLED_LIBRARIES").is_ok() { println!("cargo:rustc-link-lib=ntdll"); } else { println!("cargo:rustc-link-lib=winapi_ntdll"); } } } }