diff options
Diffstat (limited to 'build.rs')
-rw-r--r-- | build.rs | 10 |
1 files changed, 6 insertions, 4 deletions
@@ -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", |