1 2 3 4 5 6 7 8 9 10 11 12
#[cfg(rustver)] fn main() { use rustc_version::version; let version = version().expect("Can't get the rustc version"); println!( "cargo:rustc-env=RUSTC_SEMVER={}.{}", version.major, version.minor ); } #[cfg(not(rustver))] fn main() {}