Auto merge of #131634 - davidlattimore:lld-protected, r=Kobzol · rust-lang/rust@9fa9ef3 (original) (raw)
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- src/bootstrap/src/core/build_steps
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1056,6 +1056,14 @@ pub fn rustc_cargo( | ||
| 1056 | 1056 | cargo.rustflag("-l").rustflag("Enzyme-19"); |
| 1057 | 1057 | } |
| 1058 | 1058 | |
| 1059 | +// Building with protected visibility reduces the number of dynamic relocations needed, giving | |
| 1060 | +// us a faster startup time. However GNU ld < 2.40 will error if we try to link a shared object | |
| 1061 | +// with direct references to protected symbols, so for now we only use protected symbols if | |
| 1062 | +// linking with LLD is enabled. | |
| 1063 | +if builder.build.config.lld_mode.is_used() { | |
| 1064 | + cargo.rustflag("-Zdefault-visibility=protected"); | |
| 1065 | +} | |
| 1066 | + | |
| 1059 | 1067 | // We currently don't support cross-crate LTO in stage0. This also isn't hugely necessary |
| 1060 | 1068 | // and may just be a time sink. |
| 1061 | 1069 | if compiler.stage != 0 { |