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Auto merge of #72746 - petrhosek:libunwind-hermetic, r=tmandry

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Make libunwind build hermetic

We want to avoid exporting any symbols from Rust's version of libunwind,
and to do so we need to disable visibility annotations to make sure that
the -fvisibility=hidden has effect, and also hide global new/delete.

This matches the CMake build of libunwind.
This commit is contained in:
bors 2020-06-03 12:20:45 +00:00
commit 6f48888456
1 changed files with 2 additions and 0 deletions
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src/libunwind/build.rs
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@ -90,6 +90,8 @@ pub fn compile() {
cfg.flag("-fstrict-aliasing"); cfg.flag("-fstrict-aliasing");
cfg.flag("-funwind-tables"); cfg.flag("-funwind-tables");
cfg.flag("-fvisibility=hidden"); cfg.flag("-fvisibility=hidden");
cfg.flag_if_supported("-fvisibility-global-new-delete-hidden");
cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None);
} }
let mut unwind_sources = vec![ let mut unwind_sources = vec![