main()1 fn main() { 2 // Forward the profile to the main compilation 3 println!("cargo:rustc-env=PROFILE={}", std::env::var("PROFILE").unwrap()); 4 // Don't rebuild even if nothing changed 5 println!("cargo:rerun-if-changed=build.rs"); 6 rustc_tools_util::setup_version_info!(); 7 } 8