let dst_file = &dst_dir.join(file.to_string() + ".o");
if !up_to_date(src_file, dst_file) {
let mut cmd = Command::new(&builder.initial_rustc);
+ cmd.env("RUSTC_BOOTSTRAP", "1");
+ if !builder.local_rebuild {
+ // a local_rebuild compiler already has stage1 features
+ cmd.arg("--cfg").arg("bootstrap");
+ }
builder.run(
- cmd.env("RUSTC_BOOTSTRAP", "1")
- .arg("--cfg")
- .arg("bootstrap")
- .arg("--target")
+ cmd.arg("--target")
.arg(target.rustc_target_arg())
.arg("--emit=obj")
.arg("-o")