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Promote powerpc64le-unknown-linux-musl to tier 2 with host tools #133801

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Gelbpunkt
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@Gelbpunkt Gelbpunkt commented Dec 3, 2024

MCP: rust-lang/compiler-team#803

I'm using crosstool-ng for building a toolchain because GCC 9 from musl-toolchain.sh has float ABI issues (?) and can't compile LLVM, and writing a crosstool-ng config for a target feels less hacky than yet another target specific shell script. I also defined a kernel version, since there wasn't one specified before. If a lower version is desired, just let me know. I also tried to match the rust configure args with the loongarch64 musl tier 2 target.

The resulting compiler works fine, built with DEPLOY=1 ./src/ci/docker/run.sh dist-powerpc64le-linux and tested on Alpine Linux in a VM and on a bare metal POWER8 machine:

qemu-ppc64le:/tmp/rust-nightly-powerpc64le-unknown-linux-musl$ ash install.sh
install: creating uninstall script at /usr/local/lib/rustlib/uninstall.sh
install: installing component 'rustc'
install: installing component 'rust-std-powerpc64le-unknown-linux-musl'
install: installing component 'cargo'
install: installing component 'rustfmt-preview'
install: installing component 'rls-preview'
install: installing component 'rust-analyzer-preview'
install: installing component 'llvm-tools-preview'
install: installing component 'clippy-preview'
install: installing component 'miri-preview'
install: installing component 'rust-analysis-powerpc64le-unknown-linux-musl'
install: installing component 'llvm-bitcode-linker-preview'
install: WARNING: failed to run ldconfig. this may happen when not installing as root. run with --verbose to see the error

    rust installed.

qemu-ppc64le:~$ echo 'fn main() { println!("hello world"); }' > test.rs
qemu-ppc64le:~$ rustc test.rs
qemu-ppc64le:~$ ./test
hello world
qemu-ppc64le:~$ file test
test: ELF 64-bit LSB executable, 64-bit PowerPC or cisco 7500, OpenPOWER ELF V2 ABI, version 1 (SYSV), statically linked, BuildID[sha1]=596ee6abf9add487ebc54fb71c2076fb6faea013, with debug_info, not stripped

try-job: dist-powerpc64le-linux

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rustbot commented Dec 3, 2024

r? @ehuss

rustbot has assigned @ehuss.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

@rustbot rustbot added A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue. labels Dec 3, 2024
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@Gelbpunkt Gelbpunkt force-pushed the powerpc64le-unknown-linux-musl-tier-2 branch from b593b82 to a395c38 Compare December 3, 2024 16:05
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rustbot commented Dec 3, 2024

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

This PR changes how LLVM is built. Consider updating src/bootstrap/download-ci-llvm-stamp.

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

cc @Noratrieb

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ehuss commented Dec 3, 2024

r? compiler

@rustbot rustbot assigned petrochenkov and unassigned ehuss Dec 3, 2024
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Urgau commented Dec 3, 2024

The compiler changes looks go to me, r=me on them.
T-bootstrap for the final review.

r? bootstrap
@bors try

bors added a commit to rust-lang-ci/rust that referenced this pull request Dec 3, 2024
…musl-tier-2, r=<try>

Promote powerpc64le-unknown-linux-musl to tier 2 with host tools

MCP: rust-lang/compiler-team#803

I'm using crosstool-ng for building a toolchain because GCC 9 from `musl-toolchain.sh` has float ABI issues (?) and can't compile LLVM, and writing a crosstool-ng config for a target feels less hacky than yet another target specific shell script. I also defined a kernel version, since there wasn't one specified before. If a lower version is desired, just let me know. I also tried to match the rust configure args with the loongarch64 musl tier 2 target.

The resulting compiler works fine, built with `DEPLOY=1 ./src/ci/docker/run.sh dist-powerpc64le-linux` and tested on Alpine Linux in a VM and on a bare metal POWER8 machine:
```
qemu-ppc64le:/tmp/rust-nightly-powerpc64le-unknown-linux-musl$ ash install.sh
install: creating uninstall script at /usr/local/lib/rustlib/uninstall.sh
install: installing component 'rustc'
install: installing component 'rust-std-powerpc64le-unknown-linux-musl'
install: installing component 'cargo'
install: installing component 'rustfmt-preview'
install: installing component 'rls-preview'
install: installing component 'rust-analyzer-preview'
install: installing component 'llvm-tools-preview'
install: installing component 'clippy-preview'
install: installing component 'miri-preview'
install: installing component 'rust-analysis-powerpc64le-unknown-linux-musl'
install: installing component 'llvm-bitcode-linker-preview'
install: WARNING: failed to run ldconfig. this may happen when not installing as root. run with --verbose to see the error

    rust installed.

qemu-ppc64le:~$ echo 'fn main() { println!("hello world"); }' > test.rs
qemu-ppc64le:~$ rustc test.rs
qemu-ppc64le:~$ ./test
hello world
qemu-ppc64le:~$ file test
test: ELF 64-bit LSB executable, 64-bit PowerPC or cisco 7500, OpenPOWER ELF V2 ABI, version 1 (SYSV), statically linked, BuildID[sha1]=596ee6abf9add487ebc54fb71c2076fb6faea013, with debug_info, not stripped
```

try-job: dist-powerpc64le-linux
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bors commented Dec 3, 2024

⌛ Trying commit 2b637c6 with merge 31943ab...

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jieyouxu commented Dec 3, 2024

r? jieyouxu

@rustbot rustbot assigned jieyouxu and unassigned albertlarsan68 Dec 3, 2024
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Thanks. The bootstrap bits look fine to me (r=me for bootstrap bits and a second on the compiler changes), I'll hand this off to T-infra to look at the CI changes.

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jieyouxu commented Dec 3, 2024

r? infra

@rustbot rustbot assigned Mark-Simulacrum and unassigned jieyouxu Dec 3, 2024
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The build looks like it got stuck at some point

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jieyouxu commented Dec 3, 2024

Build failure is unrelated.

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Could you please move the CI job to job-linux-4c-largedisk in jobs.yml? Then we'll evaluate how long it takes.

Done :)

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Kobzol commented Dec 9, 2024

@bors try

bors added a commit to rust-lang-ci/rust that referenced this pull request Dec 9, 2024
…musl-tier-2, r=<try>

Promote powerpc64le-unknown-linux-musl to tier 2 with host tools

MCP: rust-lang/compiler-team#803

I'm using crosstool-ng for building a toolchain because GCC 9 from `musl-toolchain.sh` has float ABI issues (?) and can't compile LLVM, and writing a crosstool-ng config for a target feels less hacky than yet another target specific shell script. I also defined a kernel version, since there wasn't one specified before. If a lower version is desired, just let me know. I also tried to match the rust configure args with the loongarch64 musl tier 2 target.

The resulting compiler works fine, built with `DEPLOY=1 ./src/ci/docker/run.sh dist-powerpc64le-linux` and tested on Alpine Linux in a VM and on a bare metal POWER8 machine:
```
qemu-ppc64le:/tmp/rust-nightly-powerpc64le-unknown-linux-musl$ ash install.sh
install: creating uninstall script at /usr/local/lib/rustlib/uninstall.sh
install: installing component 'rustc'
install: installing component 'rust-std-powerpc64le-unknown-linux-musl'
install: installing component 'cargo'
install: installing component 'rustfmt-preview'
install: installing component 'rls-preview'
install: installing component 'rust-analyzer-preview'
install: installing component 'llvm-tools-preview'
install: installing component 'clippy-preview'
install: installing component 'miri-preview'
install: installing component 'rust-analysis-powerpc64le-unknown-linux-musl'
install: installing component 'llvm-bitcode-linker-preview'
install: WARNING: failed to run ldconfig. this may happen when not installing as root. run with --verbose to see the error

    rust installed.

qemu-ppc64le:~$ echo 'fn main() { println!("hello world"); }' > test.rs
qemu-ppc64le:~$ rustc test.rs
qemu-ppc64le:~$ ./test
hello world
qemu-ppc64le:~$ file test
test: ELF 64-bit LSB executable, 64-bit PowerPC or cisco 7500, OpenPOWER ELF V2 ABI, version 1 (SYSV), statically linked, BuildID[sha1]=596ee6abf9add487ebc54fb71c2076fb6faea013, with debug_info, not stripped
```

try-job: dist-powerpc64le-linux
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bors commented Dec 9, 2024

⌛ Trying commit 286de9f with merge ad080db...

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bors commented Dec 9, 2024

☀️ Try build successful - checks-actions
Build commit: ad080db (ad080db1a019cf7044dfb75863d11b11aaa5e6b8)

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Kobzol commented Dec 9, 2024

@bors try

bors added a commit to rust-lang-ci/rust that referenced this pull request Dec 9, 2024
…musl-tier-2, r=<try>

Promote powerpc64le-unknown-linux-musl to tier 2 with host tools

MCP: rust-lang/compiler-team#803

I'm using crosstool-ng for building a toolchain because GCC 9 from `musl-toolchain.sh` has float ABI issues (?) and can't compile LLVM, and writing a crosstool-ng config for a target feels less hacky than yet another target specific shell script. I also defined a kernel version, since there wasn't one specified before. If a lower version is desired, just let me know. I also tried to match the rust configure args with the loongarch64 musl tier 2 target.

The resulting compiler works fine, built with `DEPLOY=1 ./src/ci/docker/run.sh dist-powerpc64le-linux` and tested on Alpine Linux in a VM and on a bare metal POWER8 machine:
```
qemu-ppc64le:/tmp/rust-nightly-powerpc64le-unknown-linux-musl$ ash install.sh
install: creating uninstall script at /usr/local/lib/rustlib/uninstall.sh
install: installing component 'rustc'
install: installing component 'rust-std-powerpc64le-unknown-linux-musl'
install: installing component 'cargo'
install: installing component 'rustfmt-preview'
install: installing component 'rls-preview'
install: installing component 'rust-analyzer-preview'
install: installing component 'llvm-tools-preview'
install: installing component 'clippy-preview'
install: installing component 'miri-preview'
install: installing component 'rust-analysis-powerpc64le-unknown-linux-musl'
install: installing component 'llvm-bitcode-linker-preview'
install: WARNING: failed to run ldconfig. this may happen when not installing as root. run with --verbose to see the error

    rust installed.

qemu-ppc64le:~$ echo 'fn main() { println!("hello world"); }' > test.rs
qemu-ppc64le:~$ rustc test.rs
qemu-ppc64le:~$ ./test
hello world
qemu-ppc64le:~$ file test
test: ELF 64-bit LSB executable, 64-bit PowerPC or cisco 7500, OpenPOWER ELF V2 ABI, version 1 (SYSV), statically linked, BuildID[sha1]=596ee6abf9add487ebc54fb71c2076fb6faea013, with debug_info, not stripped
```

try-job: dist-powerpc64le-linux
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bors commented Dec 9, 2024

⌛ Trying commit 286de9f with merge 6ebd309...

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bors commented Dec 9, 2024

☀️ Try build successful - checks-actions
Build commit: 6ebd309 (6ebd3096e3613f0bdb88f036367c69b080de1406)

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Kobzol commented Dec 9, 2024

It's on the slower side, but ~2h 30m is acceptable given our current CI budget.

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I'm assuming the waiting on author label is left here by mistake.

@rustbot label -S-waiting-on-author +S-waiting-on-review

@rustbot rustbot 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 Dec 10, 2024
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Kobzol commented Dec 16, 2024

No infra objections were raised on Zulip, so approving.

@bors r=jieyouxu,Urgau,Kobzol

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bors commented Dec 16, 2024

📌 Commit 286de9f has been approved by jieyouxu,Urgau,Kobzol

It is now in the queue for this repository.

@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 Dec 16, 2024
jieyouxu added a commit to jieyouxu/rust that referenced this pull request Dec 17, 2024
…x-musl-tier-2, r=jieyouxu,Urgau,Kobzol

Promote powerpc64le-unknown-linux-musl to tier 2 with host tools

MCP: rust-lang/compiler-team#803

I'm using crosstool-ng for building a toolchain because GCC 9 from `musl-toolchain.sh` has float ABI issues (?) and can't compile LLVM, and writing a crosstool-ng config for a target feels less hacky than yet another target specific shell script. I also defined a kernel version, since there wasn't one specified before. If a lower version is desired, just let me know. I also tried to match the rust configure args with the loongarch64 musl tier 2 target.

The resulting compiler works fine, built with `DEPLOY=1 ./src/ci/docker/run.sh dist-powerpc64le-linux` and tested on Alpine Linux in a VM and on a bare metal POWER8 machine:
```
qemu-ppc64le:/tmp/rust-nightly-powerpc64le-unknown-linux-musl$ ash install.sh
install: creating uninstall script at /usr/local/lib/rustlib/uninstall.sh
install: installing component 'rustc'
install: installing component 'rust-std-powerpc64le-unknown-linux-musl'
install: installing component 'cargo'
install: installing component 'rustfmt-preview'
install: installing component 'rls-preview'
install: installing component 'rust-analyzer-preview'
install: installing component 'llvm-tools-preview'
install: installing component 'clippy-preview'
install: installing component 'miri-preview'
install: installing component 'rust-analysis-powerpc64le-unknown-linux-musl'
install: installing component 'llvm-bitcode-linker-preview'
install: WARNING: failed to run ldconfig. this may happen when not installing as root. run with --verbose to see the error

    rust installed.

qemu-ppc64le:~$ echo 'fn main() { println!("hello world"); }' > test.rs
qemu-ppc64le:~$ rustc test.rs
qemu-ppc64le:~$ ./test
hello world
qemu-ppc64le:~$ file test
test: ELF 64-bit LSB executable, 64-bit PowerPC or cisco 7500, OpenPOWER ELF V2 ABI, version 1 (SYSV), statically linked, BuildID[sha1]=596ee6abf9add487ebc54fb71c2076fb6faea013, with debug_info, not stripped
```

try-job: dist-powerpc64le-linux
jieyouxu added a commit to jieyouxu/rust that referenced this pull request Dec 17, 2024
…x-musl-tier-2, r=jieyouxu,Urgau,Kobzol

Promote powerpc64le-unknown-linux-musl to tier 2 with host tools

MCP: rust-lang/compiler-team#803

I'm using crosstool-ng for building a toolchain because GCC 9 from `musl-toolchain.sh` has float ABI issues (?) and can't compile LLVM, and writing a crosstool-ng config for a target feels less hacky than yet another target specific shell script. I also defined a kernel version, since there wasn't one specified before. If a lower version is desired, just let me know. I also tried to match the rust configure args with the loongarch64 musl tier 2 target.

The resulting compiler works fine, built with `DEPLOY=1 ./src/ci/docker/run.sh dist-powerpc64le-linux` and tested on Alpine Linux in a VM and on a bare metal POWER8 machine:
```
qemu-ppc64le:/tmp/rust-nightly-powerpc64le-unknown-linux-musl$ ash install.sh
install: creating uninstall script at /usr/local/lib/rustlib/uninstall.sh
install: installing component 'rustc'
install: installing component 'rust-std-powerpc64le-unknown-linux-musl'
install: installing component 'cargo'
install: installing component 'rustfmt-preview'
install: installing component 'rls-preview'
install: installing component 'rust-analyzer-preview'
install: installing component 'llvm-tools-preview'
install: installing component 'clippy-preview'
install: installing component 'miri-preview'
install: installing component 'rust-analysis-powerpc64le-unknown-linux-musl'
install: installing component 'llvm-bitcode-linker-preview'
install: WARNING: failed to run ldconfig. this may happen when not installing as root. run with --verbose to see the error

    rust installed.

qemu-ppc64le:~$ echo 'fn main() { println!("hello world"); }' > test.rs
qemu-ppc64le:~$ rustc test.rs
qemu-ppc64le:~$ ./test
hello world
qemu-ppc64le:~$ file test
test: ELF 64-bit LSB executable, 64-bit PowerPC or cisco 7500, OpenPOWER ELF V2 ABI, version 1 (SYSV), statically linked, BuildID[sha1]=596ee6abf9add487ebc54fb71c2076fb6faea013, with debug_info, not stripped
```

try-job: dist-powerpc64le-linux
bors added a commit to rust-lang-ci/rust that referenced this pull request Dec 18, 2024
…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#133265 (Add a range argument to vec.extract_if)
 - rust-lang#133801 (Promote powerpc64le-unknown-linux-musl to tier 2 with host tools)
 - rust-lang#134323 (coverage: Dismantle `map_data.rs` by moving its responsibilities elsewhere)
 - rust-lang#134378 (An octuple of polonius fact generation cleanups)
 - rust-lang#134408 (Regression test for RPIT inheriting lifetime from projection)
 - rust-lang#134423 (bootstrap: use specific-purpose ui test path for `test_valid` self-test)
 - rust-lang#134426 (Fix typo in uint_macros.rs)

Failed merges:

 - rust-lang#133103 (Pass FnAbi to find_mir_or_eval_fn)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit ca5dfa7 into rust-lang:master Dec 18, 2024
7 checks passed
@rustbot rustbot added this to the 1.85.0 milestone Dec 18, 2024
@Gelbpunkt Gelbpunkt deleted the powerpc64le-unknown-linux-musl-tier-2 branch December 18, 2024 11:37
@Mark-Simulacrum Mark-Simulacrum added the relnotes Marks issues that should be documented in the release notes of the next release. label Jan 20, 2025
wip-sync pushed a commit to NetBSD/pkgsrc-wip that referenced this pull request Feb 23, 2025
Pkgsrc changes relative to rust184:

 * patch reorganization to deal with new version
   of upstream vendored crates, checksum updates.

Version 1.85.0 (2025-02-20)
==========================

Language
--------
- [The 2024 Edition is now stable.]
  (rust-lang/rust#133349)
  See [the edition guide]
  (https://doc.rust-lang.org/nightly/edition-guide/rust-2024/index.html)
  for more details.
- [Stabilize async closures]
  (rust-lang/rust#132706)
  See [RFC 3668]
  (https://rust-lang.github.io/rfcs/3668-async-closures.html) for more details.
- [Stabilize `#[diagnostic::do_not_recommend]`]
  (rust-lang/rust#132056)
- [Add `unpredictable_function_pointer_comparisons` lint to warn
  against function pointer comparisons]
  (rust-lang/rust#118833)
- [Lint on combining `#[no_mangle]` and `#[export_name]` attributes.]
  (rust-lang/rust#131558)

Compiler
--------
- [The unstable flag `-Zpolymorphize` has been removed]
  (rust-lang/rust#133883), see
  rust-lang/compiler-team#810 for some
  background.

Platform Support
----------------
- [Promote `powerpc64le-unknown-linux-musl` to tier 2 with host tools]
  (rust-lang/rust#133801)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

Libraries
---------
- [Panics in the standard library now have a leading `library/` in their path]
  (rust-lang/rust#132390)
- [`std::env::home_dir()` on Windows now ignores the non-standard
  `$HOME` environment variable]
  (rust-lang/rust#132515)

  It will be un-deprecated in a subsequent release.
- [Add `AsyncFn*` to the prelude in all editions.]
  (rust-lang/rust#132611)

Stabilized APIs
---------------

- [`BuildHasherDefault::new`]
  (https://doc.rust-lang.org/stable/std/hash/struct.BuildHasherDefault.html#method.new)
- [`ptr::fn_addr_eq`]
  (https://doc.rust-lang.org/std/ptr/fn.fn_addr_eq.html)
- [`io::ErrorKind::QuotaExceeded`]
  (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.QuotaExceeded)
- [`io::ErrorKind::CrossesDevices`]
  (https://doc.rust-lang.org/stable/std/io/enum.ErrorKind.html#variant.CrossesDevices)
- [`{float}::midpoint`]
  (https://doc.rust-lang.org/core/primitive.f32.html#method.midpoint)
- [Unsigned `{integer}::midpoint`]
  (https://doc.rust-lang.org/std/primitive.u64.html#method.midpoint)
- [`NonZeroU*::midpoint`]
  (https://doc.rust-lang.org/std/num/type.NonZeroU32.html#method.midpoint)
- [impl `std::iter::Extend` for tuples with arity 1 through 12]
  (https://doc.rust-lang.org/stable/std/iter/trait.Extend.html#impl-Extend%3C(A,)%3E-for-(EA,))
- [`FromIterator<(A, ...)>` for tuples with arity 1 through 12]
  (https://doc.rust-lang.org/stable/std/iter/trait.FromIterator.html#impl-FromIterator%3C(EA,)%3E-for-(A,))
- [`std::task::Waker::noop`]
  (https://doc.rust-lang.org/stable/std/task/struct.Waker.html#method.noop)

These APIs are now stable in const contexts:

- [`mem::size_of_val`]
  (https://doc.rust-lang.org/stable/std/mem/fn.size_of_val.html)
- [`mem::align_of_val`]
  (https://doc.rust-lang.org/stable/std/mem/fn.align_of_val.html)
- [`Layout::for_value`]
  (https://doc.rust-lang.org/stable/std/alloc/struct.Layout.html#method.for_value)
- [`Layout::align_to`]
  (https://doc.rust-lang.org/stable/std/alloc/struct.Layout.html#method.align_to)
- [`Layout::pad_to_align`]
  (https://doc.rust-lang.org/stable/std/alloc/struct.Layout.html#method.pad_to_align)
- [`Layout::extend`]
  (https://doc.rust-lang.org/stable/std/alloc/struct.Layout.html#method.extend)
- [`Layout::array`]
  (https://doc.rust-lang.org/stable/std/alloc/struct.Layout.html#method.array)
- [`std::mem::swap`]
  (https://doc.rust-lang.org/stable/std/mem/fn.swap.html)
- [`std::ptr::swap`]
  (https://doc.rust-lang.org/stable/std/ptr/fn.swap.html)
- [`NonNull::new`]
  (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.new)
- [`HashMap::with_hasher`]
  (https://doc.rust-lang.org/stable/std/collections/struct.HashMap.html#method.with_hasher)
- [`HashSet::with_hasher`]
  (https://doc.rust-lang.org/stable/std/collections/struct.HashSet.html#method.with_hasher)
- [`BuildHasherDefault::new`]
  (https://doc.rust-lang.org/stable/std/hash/struct.BuildHasherDefault.html#method.new)
- [`<float>::recip`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.recip)
- [`<float>::to_degrees`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.to_degrees)
- [`<float>::to_radians`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.to_radians)
- [`<float>::max`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.max)
- [`<float>::min`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.min)
- [`<float>::clamp`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.clamp)
- [`<float>::abs`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.abs)
- [`<float>::signum`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.signum)
- [`<float>::copysign`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.copysign)
- [`MaybeUninit::write`]
  (https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#method.write)

Cargo
-----
- [Add future-incompatibility warning against keywords in cfgs and
  add raw-idents] (rust-lang/cargo#14671)
- [Stabilize higher precedence trailing flags]
  (rust-lang/cargo#14900)
- [Pass `CARGO_CFG_FEATURE` to build scripts]
  (rust-lang/cargo#14902)

Rustdoc
-----
- [Doc comment on impl blocks shows the first line, even when the
  impl block is collapsed] (rust-lang/rust#132155)

Compatibility Notes
-------------------
- [`rustc` no longer treats the `test` cfg as a well known
  check-cfg] (rust-lang/rust#131729),
  instead it is up to the build systems and users of
  `--check-cfg`[^check-cfg] to set it as a well known cfg using
  `--check-cfg=cfg(test)`.

  This is done to enable build systems like Cargo to set it
  conditionally, as not all source files are suitable for unit
  tests.

  [Cargo (for now) unconditionally sets the `test` cfg as a well known cfg]
  (rust-lang/cargo#14963).
  [^check-cfg]: https://doc.rust-lang.org/nightly/rustc/check-cfg.html

- [Disable potentially incorrect type inference if there are trivial
  and non-trivial where-clauses]
  (rust-lang/rust#132325)

- `std::env::home_dir()` has been deprecated for years, because it
  can give surprising results in some Windows configurations if the
  `HOME` environment variable is set (which is not the normal
  configuration on Windows). We had previously avoided changing its
  behavior, out of concern for compatibility with code depending on
  this non-standard configuration. Given how long this function has
  been deprecated, we're now fixing its behavior as a bugfix. A
  subsequent release will remove the deprecation for this function.

- [Make `core::ffi::c_char` signedness more closely match that of
  the platform-default `char`]
  (rust-lang/rust#132975)

  This changed `c_char` from an `i8` to `u8` or vice versa on many
  Tier 2 and 3 targets (mostly Arm and RISC-V embedded targets).
  The new definition may result in compilation failures but fixes
  compatibility issues with C.

  The `libc` crate matches this change as of its 0.2.169 release.

- [When compiling a nested `macro_rules` macro from an external
  crate, the content of the inner `macro_rules` is now built with
  the edition of the external crate, not the local crate.]
  (rust-lang/rust#133274)
- [Increase `sparcv9-sun-solaris` and `x86_64-pc-solaris` Solaris
  baseline to 11.4.]
  (rust-lang/rust#133293)
- [Show `abi_unsupported_vector_types` lint in future breakage reports]
  (rust-lang/rust#133374)
- [Error if multiple super-trait instantiations of `dyn Trait` need
  associated types to be specified but only one is provided]
  (rust-lang/rust#133392)
- [Change `powerpc64-ibm-aix` default `codemodel` to large]
  (rust-lang/rust#133811)

Internal Changes
----------------

These changes do not affect any public interfaces of Rust, but they
represent significant improvements to the performance or internals
of rustc and related tools.

- [Build `x86_64-unknown-linux-gnu` with LTO for C/C++ code (e.g., `jemalloc`)]
  (rust-lang/rust#134690)
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