fn main() { | |
println!("cargo:rerun-if-changed=build.rs"); | |
let nightly = std::env::var_os("CARGO_FEATURE_NIGHTLY").is_some(); | |
let has_stable_alloc = || autocfg::new().probe_rustc_version(1, 36); | |
if nightly || has_stable_alloc() { | |
autocfg::emit("has_extern_crate_alloc") | |
} | |
} |