Update bundled musl to 1.2.5

[Gankra]

Update the bundled musl library from 1.2.3 to the 1.2.5 release from February 29, 2024.

• mcp: Upgrade *-linux-musl targets to musl 1.2.5 compiler-team#887
• blog: Create Updating-musl-1.2.5.md blog.rust-lang.org#1641
• Prior update: Update the version of musl used on *-linux-musl targets to 1.2.3 #107129
• musl releases page

---

This is a rebase of

• Update bundled musl to 1.2.5 #125692

Which removes the second speculative commit which ended up not panning out.

I've added my own second commit that updates all other places I could find that referenced musl 1.2.3 in the codebase.

try-job: dist-x86_64-musl
try-job: dist-i586-gnu-i586-i686-musl
try-job: dist-x86_64-linux

[rustbot]

r? @BoxyUwU

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[rustbot]

These commits modify compiler targets.
(See the Target Tier Policy.)

Some changes occurred in src/doc/rustc/src/platform-support

cc @Noratrieb

[Gankra]

The previous PR stalled out on concerns of ecosystem breakage, but see this comment for @est31 concluding we can move forward without further mitigation: #125692 (comment)

[Gankra]

I would like to nominate this for FCP or whatever the current process is to land these kinds of major toolchain changes.

Landing this update is expected to resolve ongoing issues in the ecosystem with rootless docker images.

I've also drafted a rust-lang blogpost announcing this change (based on the previous musl update's post).

[jieyouxu]

The process for bumping the target baseline of Tier 2 targets is currently a Major Change Proposal + FCP (see Changing target baseline (e.g. minimum Darwin or Windows version bump) part). If you draft an MCP, I'll help with the notifying relevant target maintainers part.

Changing target baseline (e.g. minimum Darwin or Windows version bump)

• Propose using: MCP
• Approve using: FCP
• Write an MCP describing why the target should have a change of baseline and once discussion has concluded, an FCP can be started to approve the change of baseline.

[jieyouxu]

r? @wesleywiser (since you've reviewed the previous attempt)

[Gankra]

I have filed an MCP:

• Upgrade *-linux-musl targets to musl 1.2.5 compiler-team#887

[workingjubilee]

Building host compiler plus musl stds for crater run.

@bors try

[bors]

⌛ Trying commit 1926e11 with merge 1271e16...

[bors]

💥 Test timed out

[workingjubilee]

@bors2 delegate=try

[rust-bors]

@Gankra can now perform try builds on this pull request

[rust-rfcbot]

🔔 This is now entering its final comment period, as per the review above. 🔔

[rust-rfcbot]

The final comment period, with a disposition to merge, as per the review above, is now complete.

As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed.

This will be merged soon.

[Gankra]

LOUD SIREN NOISES

IT'S TIME

[workingjubilee]

It seems it is indeed time~

@bors r=wesleywiser

[bors]

📌 Commit 010b690 has been approved by wesleywiser

It is now in the queue for this repository.