1 extern crate autocfg;
2 
3 use std::env;
4 
main()5 fn main() {
6     // If the "i128" feature is explicity requested, don't bother probing for it.
7     // It will still cause a build error if that was set improperly.
8     if env::var_os("CARGO_FEATURE_I128").is_some() || autocfg::new().probe_type("i128") {
9         autocfg::emit("has_i128");
10     }
11 
12     autocfg::rerun_path("build.rs");
13 }
14