nordic-dev.net/rust
nordic-dev.net/rust
2
0
Fork 0
mirror of https://github.com/rust-lang/rust.git synced 2024-12-29 00:46:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

Skip LTO in stage0 (again)

Browse Source
This commit is contained in:
Mark Rousskov 2022-12-28 15:28:09 -05:00
parent fbe0450251
commit cc4e434854
1 changed files with 20 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
src/bootstrap/compile.rs
View File

@ -691,23 +691,27 @@ impl Step for Rustc {
));
}
match builder.config.rust_lto {
RustcLto::Thin | RustcLto::Fat => {
// Since using LTO for optimizing dylibs is currently experimental,
// we need to pass -Zdylib-lto.
cargo.rustflag("-Zdylib-lto");
// Cargo by default passes `-Cembed-bitcode=no` and doesn't pass `-Clto` when
// compiling dylibs (and their dependencies), even when LTO is enabled for the
// crate. Therefore, we need to override `-Clto` and `-Cembed-bitcode` here.
let lto_type = match builder.config.rust_lto {
RustcLto::Thin => "thin",
RustcLto::Fat => "fat",
_ => unreachable!(),
};
cargo.rustflag(&format!("-Clto={}", lto_type));
cargo.rustflag("-Cembed-bitcode=yes");
// We currently don't support cross-crate LTO in stage0. This also isn't hugely necessary
// and may just be a time sink.
if compiler.stage != 0 {
match builder.config.rust_lto {
RustcLto::Thin | RustcLto::Fat => {
// Since using LTO for optimizing dylibs is currently experimental,
// we need to pass -Zdylib-lto.
cargo.rustflag("-Zdylib-lto");
// Cargo by default passes `-Cembed-bitcode=no` and doesn't pass `-Clto` when
// compiling dylibs (and their dependencies), even when LTO is enabled for the
// crate. Therefore, we need to override `-Clto` and `-Cembed-bitcode` here.
let lto_type = match builder.config.rust_lto {
RustcLto::Thin => "thin",
RustcLto::Fat => "fat",
_ => unreachable!(),
};
cargo.rustflag(&format!("-Clto={}", lto_type));
cargo.rustflag("-Cembed-bitcode=yes");
}
RustcLto::ThinLocal => { /* Do nothing, this is the default */ }
}
RustcLto::ThinLocal => { /* Do nothing, this is the default */ }
}
builder.info(&format!(