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#![warn(rust_2018_idioms, single_use_lifetimes)]
use std::env;
include!("no_atomic.rs");
// The rustc-cfg strings below are *not* public API. Please let us know by
// opening a GitHub issue if your build environment requires some way to enable
// these cfgs other than by executing our build script.
fn main() {
let target = match env::var("TARGET") {
Ok(target) => target,
Err(e) => {
println!(
"cargo:warning=valuable: unable to get TARGET environment variable: {}",
e
);
return;
}
};
// Note that this is `no_*`, not `has_*`. This allows treating
// `cfg(target_has_atomic = "ptr")` as true when the build script doesn't
// run. This is needed for compatibility with non-cargo build systems that
// don't run the build script.
if NO_ATOMIC_CAS.contains(&&*target) {
println!("cargo:rustc-cfg=valuable_no_atomic_cas");
}
if NO_ATOMIC.contains(&&*target) {
println!("cargo:rustc-cfg=valuable_no_atomic");
println!("cargo:rustc-cfg=valuable_no_atomic_64");
} else if NO_ATOMIC_64.contains(&&*target) {
println!("cargo:rustc-cfg=valuable_no_atomic_64");
} else {
// Otherwise, assuming `"max-atomic-width" == 64`.
}
println!("cargo:rerun-if-changed=no_atomic.rs");
}
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