extern crate rustc_version;
use rustc_version::{version, version_meta, Channel};
fn main() {
// Assert we haven't travelled back in time
assert!(version().major >= 1);
// Set cfg flags depending on release channel
match version_meta().channel {
Channel::Nightly => {
println!("cargo:rustc-cfg=RUSTC_IS_NIGHTLY");
},
_ => {}
};
}