#[rustversion::nightly]
fn nightly() {
println!("cargo:rustc-cfg=nightly");
}
#[rustversion::not(nightly)]
fn nightly() {}
fn main() {
println!("cargo:rerun-if-changed=build.rs");
println!("cargo:rustc-check-cfg=cfg(nightly)");
nightly();
#[cfg(target_env = "musl")]
println!("cargo:rustc-link-lib=ucontext");
}