extern crate autocfg; | |
use std::env; | |
fn main() { | |
let ac = autocfg::new(); | |
if ac.probe_type("i128") { | |
println!("cargo:rustc-cfg=has_i128"); | |
} else if env::var_os("CARGO_FEATURE_I128").is_some() { | |
panic!("i128 support was not detected!"); | |
} | |
ac.emit_expression_cfg( | |
"unsafe { 1f64.to_int_unchecked::<i32>() }", | |
"has_to_int_unchecked", | |
); | |
autocfg::rerun_path("build.rs"); | |
} |