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Use link attributes on extern "C" blocks with llvm-libuwind #62287

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merged 1 commit into from
Jul 4, 2019

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petrhosek
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When llvm-libunwind feature is enabled, we need to use link attribute on
extern "C" blocks to make sure that symbols provided by LLVM's libunwind
that's built as part of Rust's libunwind crate are re-exported.

This addresses issue #62088.

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r? @alexcrichton

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Jul 2, 2019
@petrhosek
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This change requires #62286 otherwise we'll get duplicate symbol error at link time since libunwind.rs has multiple extern "C" blocks that all use the link(name = "unwind", kind = "static") attribute.

cc @alexcrichton @Zoxc @cramertj @tmandry

When llvm-libunwind feature is enabled, we need to use link attribute on
extern "C" blocks to make sure that symbols provided by LLVM's libunwind
that's built as part of Rust's libunwind crate are re-exported.

This addresses issue rust-lang#62088.
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tmandry commented Jul 2, 2019

@bors r+

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bors commented Jul 2, 2019

📌 Commit 8d2f80b has been approved by tmandry

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jul 2, 2019
Mark-Simulacrum added a commit to Mark-Simulacrum/rust that referenced this pull request Jul 3, 2019
… r=tmandry

Use link attributes on extern "C" blocks with llvm-libuwind

When llvm-libunwind feature is enabled, we need to use link attribute on
extern "C" blocks to make sure that symbols provided by LLVM's libunwind
that's built as part of Rust's libunwind crate are re-exported.

This addresses issue rust-lang#62088.
Centril added a commit to Centril/rust that referenced this pull request Jul 3, 2019
… r=tmandry

Use link attributes on extern "C" blocks with llvm-libuwind

When llvm-libunwind feature is enabled, we need to use link attribute on
extern "C" blocks to make sure that symbols provided by LLVM's libunwind
that's built as part of Rust's libunwind crate are re-exported.

This addresses issue rust-lang#62088.
Centril added a commit to Centril/rust that referenced this pull request Jul 3, 2019
… r=tmandry

Use link attributes on extern "C" blocks with llvm-libuwind

When llvm-libunwind feature is enabled, we need to use link attribute on
extern "C" blocks to make sure that symbols provided by LLVM's libunwind
that's built as part of Rust's libunwind crate are re-exported.

This addresses issue rust-lang#62088.
Centril added a commit to Centril/rust that referenced this pull request Jul 3, 2019
… r=tmandry

Use link attributes on extern "C" blocks with llvm-libuwind

When llvm-libunwind feature is enabled, we need to use link attribute on
extern "C" blocks to make sure that symbols provided by LLVM's libunwind
that's built as part of Rust's libunwind crate are re-exported.

This addresses issue rust-lang#62088.
bors added a commit that referenced this pull request Jul 3, 2019
Rollup of 17 pull requests

Successful merges:

 - #62039 (Remove needless lifetimes (rustc))
 - #62153 (Update the `rust-installer` submodule)
 - #62173 (rename InterpretCx -> InterpCx)
 - #62240 (wfcheck: resolve the type-vars in `AdtField` types)
 - #62249 (Use mem::take instead of mem::replace with default)
 - #62252 (Update mem::replace example to not be identical to mem::take)
 - #62258 (syntax: Unsupport `foo! bar { ... }` macros in the parser)
 - #62268 (Clean up inherent_impls)
 - #62287 (Use link attributes on extern "C" blocks with llvm-libuwind)
 - #62295 (miri realloc: do not require giving old size+align)
 - #62297 (refactor check_for_substitution)
 - #62316 (When possible without changing semantics, implement Iterator::last in terms of DoubleEndedIterator::next_back for types in liballoc and libcore.)
 - #62317 (Migrate `compile-pass` annotations to `build-pass`)
 - #62337 (Fix bucket in CPU usage script)
 - #62344 (simplify Option::get_or_insert)
 - #62346 (enable a few more tests in Miri and update the comment for others)
 - #62351 (remove bogus example from drop_in_place)

Failed merges:

r? @ghost
Centril added a commit to Centril/rust that referenced this pull request Jul 3, 2019
… r=tmandry

Use link attributes on extern "C" blocks with llvm-libuwind

When llvm-libunwind feature is enabled, we need to use link attribute on
extern "C" blocks to make sure that symbols provided by LLVM's libunwind
that's built as part of Rust's libunwind crate are re-exported.

This addresses issue rust-lang#62088.
bors added a commit that referenced this pull request Jul 3, 2019
Rollup of 16 pull requests

Successful merges:

 - #62039 (Remove needless lifetimes (rustc))
 - #62173 (rename InterpretCx -> InterpCx)
 - #62240 (wfcheck: resolve the type-vars in `AdtField` types)
 - #62249 (Use mem::take instead of mem::replace with default)
 - #62252 (Update mem::replace example to not be identical to mem::take)
 - #62258 (syntax: Unsupport `foo! bar { ... }` macros in the parser)
 - #62268 (Clean up inherent_impls)
 - #62287 (Use link attributes on extern "C" blocks with llvm-libuwind)
 - #62295 (miri realloc: do not require giving old size+align)
 - #62297 (refactor check_for_substitution)
 - #62316 (When possible without changing semantics, implement Iterator::last in terms of DoubleEndedIterator::next_back for types in liballoc and libcore.)
 - #62317 (Migrate `compile-pass` annotations to `build-pass`)
 - #62337 (Fix bucket in CPU usage script)
 - #62344 (simplify Option::get_or_insert)
 - #62346 (enable a few more tests in Miri and update the comment for others)
 - #62351 (remove bogus example from drop_in_place)

Failed merges:

r? @ghost
@bors bors merged commit 8d2f80b into rust-lang:master Jul 4, 2019
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5 participants