| extern crate autocfg; | |
| use std::env; | |
| fn main() { | |
| let ac = autocfg::new(); | |
| // If the "i128" feature is explicity requested, don't bother probing for it. | |
| // It will still cause a build error if that was set improperly. | |
| if env::var_os("CARGO_FEATURE_I128").is_some() || ac.probe_type("i128") { | |
| autocfg::emit("has_i128"); | |
| } | |
| ac.emit_expression_cfg( | |
| "unsafe { 1f64.to_int_unchecked::<i32>() }", | |
| "has_to_int_unchecked", | |
| ); | |
| autocfg::rerun_path("build.rs"); | |
| } |