use std::process::exit;
use rustc_version::{version_meta, Channel, Version};
fn main() {
let version_meta = version_meta().expect("Could not get Rust version");
println!("cargo:rustc-check-cfg=cfg(nightly)");
if version_meta.channel == Channel::Nightly {
println!("cargo:rustc-cfg=nightly");
}
let rustc_version = version_meta.semver;
let trimmed_rustc_version = Version::new(
rustc_version.major,
rustc_version.minor,
rustc_version.patch,
);
if cfg!(feature = "backtrace") && trimmed_rustc_version < Version::new(1, 65, 0) {
println!("cargo:warning=The `backtrace` feature requires Rust 1.65.0 or later.");
exit(1);
}
println!("cargo:rustc-check-cfg=cfg(rust_1_81)");
if trimmed_rustc_version >= Version::new(1, 81, 0) {
println!("cargo:rustc-cfg=rust_1_81");
}
}