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Trust the "i128" feature #185

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merged 1 commit into from
Oct 29, 2020
Merged

Trust the "i128" feature #185

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10 changes: 6 additions & 4 deletions build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,11 +4,13 @@ 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!");

// 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",
Expand Down