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Make llvm-libunwind a per-target option #93604

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merged 1 commit into from May 25, 2022
Merged

Make llvm-libunwind a per-target option #93604

merged 1 commit into from May 25, 2022

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tmandry
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@tmandry tmandry commented Feb 2, 2022

Fuchsia doesn't ship libunwind in its SDK, so we must provide it statically.

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r? @Mark-Simulacrum

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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 Feb 2, 2022
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cc @12101111

@tmandry tmandry added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 5, 2022
@Mark-Simulacrum Mark-Simulacrum added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Feb 5, 2022
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Mark-Simulacrum reviewed Feb 6, 2022
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config.toml.example Outdated
# means static link to the in-tree build of llvm libunwind, and 'system' means
# static link to `libunwind.a` provided by system. Due to the limitation of glibc,
# it must link to `libgcc_eh.a` to get a working output, and this option have no effect.
# Global default for llvm-libunwind for all targets. Overrides target default.
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I would not expect this to override the target default? Unless I'm misunderstanding, I would expect us to have:

  • target.llvm-libunwind (if set)
  • (global) llvm-libunwind (if set)
  • target.llvm-libunwind (default)
  • (global) llvm-unwind (default)

as the rough order.

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That's the intended order. I'm trying to point out the relative ordering between #2 and #3 in your comment. Can you think of wording that would be clearer?

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Maybe just essentially inlining my list as-is? Maybe saying something like "Note that the target-specific option llvm-libunwind will override this if set" would work too. "Overrides target default" to me feels a little unclear -- I think it can only mean one thing on a second reading, but the initial implication seems confusing, maybe because it is saying something that sounds obviously true to me :)

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Went with your second suggestion, is this more clear?

@Mark-Simulacrum Mark-Simulacrum added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 6, 2022
@tmandry tmandry added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Mar 10, 2022
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Yes, seems great.

@bors r+ rollup

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bors commented Mar 10, 2022

📌 Commit 42624ba has been approved by Mark-Simulacrum

@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 Mar 10, 2022
m-ou-se added a commit to m-ou-se/rust that referenced this pull request Mar 10, 2022
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Rollup merge of rust-lang#93604 - tmandry:libunwind-fuchsia-default, …
321e159 
…r=Mark-Simulacrum

Use in-tree libunwind by default on Fuchsia

Fuchsia doesn't ship libunwind in its SDK, so we must provide it statically.
@m-ou-se m-ou-se mentioned this pull request Mar 10, 2022
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Dylan-DPC added a commit to Dylan-DPC/rust that referenced this pull request Mar 10, 2022
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Rollup merge of rust-lang#93604 - tmandry:libunwind-fuchsia-default, …
005d3b7 
…r=Mark-Simulacrum

Use in-tree libunwind by default on Fuchsia

Fuchsia doesn't ship libunwind in its SDK, so we must provide it statically.
@Dylan-DPC Dylan-DPC mentioned this pull request Mar 10, 2022
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@bors r-

failed in rollup

@bors bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Mar 10, 2022
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bors commented Mar 13, 2022

☔ The latest upstream changes (presumably #94916) made this pull request unmergeable. Please resolve the merge conflicts.

@apiraino apiraino added the T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue. label May 19, 2022
@tmandry tmandry force-pushed the libunwind-fuchsia-default branch from 9d857d9 to f1e3d40 Compare May 24, 2022 23:00
@tmandry tmandry changed the title Use in-tree libunwind by default on Fuchsia Make llvm-libunwind a per-target option May 24, 2022
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tmandry commented May 24, 2022

Since this hit a snag building llvm-libunwind in Rust CI, I've taken out the Fuchsia-specific code from this PR so we can land the per-target logic.

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tmandry commented May 24, 2022

@bors r=Mark-Simulacrum

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bors commented May 24, 2022

📌 Commit f1e3d40 has been approved by Mark-Simulacrum

@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-author Status: This is awaiting some action (such as code changes or more information) from the author. labels May 24, 2022
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bors added a commit to rust-lang-ci/rust that referenced this pull request May 25, 2022
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Auto merge of rust-lang#97382 - Dylan-DPC:rollup-2t4ov4z, r=Dylan-DPC
cbdce42 
Rollup of 5 pull requests

Successful merges:

 - rust-lang#93604 (Make llvm-libunwind a per-target option)
 - rust-lang#97026 (Change orderings of `Debug` for the Atomic types to `Relaxed`.)
 - rust-lang#97105 (Add tests for lint on type dependent on consts)
 - rust-lang#97323 (Introduce stricter checks for might_permit_raw_init under a debug flag )
 - rust-lang#97379 (Add aliases for `current_dir`)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit bbb88ea into rust-lang:master May 25, 2022
@rustbot rustbot added this to the 1.63.0 milestone May 25, 2022
@tmandry tmandry deleted the libunwind-fuchsia-default branch May 25, 2022 18:30
@tmandry tmandry mentioned this pull request Jul 28, 2022
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@andrewpollack andrewpollack mentioned this pull request Aug 9, 2022
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bors added a commit to rust-lang-ci/rust that referenced this pull request Aug 13, 2022
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Auto merge of rust-lang#100341 - andrewpollack:fuchsia-llvm-libunwind…
e8dc8bc 
…, r=tmandry

Use llvm-libunwind="in-tree" for Fuchsia targets

With updates to Fuchsia CI's Zircon libraries rust-lang#99833, we can introduce `llvm-libunwind="in-tree"` for Fuchsia targets. This PR restores functionality removed from rust-lang#93604 (comment).

cc `@tmandry` `@djkoloski`
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