This is almost identical to already existing targets:
- powerpc_unknown_linux_musl.rs
- powerpc_unknown_linux_gnuspe.rs

It has support for PowerPC SPE (muslspe), which
can be used with GCC version up to 8. It is useful for Freescale or IBM
cores like e500.

This was verified to be working with OpenWrt build system for CZ.NIC's
Turris 1.x routers, which are using Freescale P2020, e500v2, so add it as
a Tier 3 target.

CommandExt::before_exec: deprecate safety in edition 2024

Similar to `set_var`, we had to find out after 1.0 was released that `before_exec` should have been unsafe. We partially rectified this by deprecating that function a long time ago, but since rust-lang#124636 we have the ability to also deprecate the safety of the old function and make it a *hard error* to call the old function outside `unsafe` in the next edition. So just in case anyone still uses the old function, let's ensure this can't be ignored when moving code to the new edition.

Cc `@rust-lang/libs-api`

Tracking:

- rust-lang#124866

Add powerpc-unknown-linux-muslspe compile target

This is almost identical to already existing targets:
- powerpc_unknown_linux_musl.rs
- powerpc_unknown_linux_gnuspe.rs

It has support for PowerPC SPE (muslspe), which
can be used with GCC version up to 8. It is useful for Freescale or IBM cores like e500.

This was verified to be working with OpenWrt build system for CZ.NIC's Turris 1.x routers, which are using Freescale P2020, e500v2, so add it as a Tier 3 target.

Follow-up of rust-lang#100860

…attr, r=compiler-errors

derive(SmartPointer): register helper attributes

Fix rust-lang#128888

This PR enables built-in macros to register helper attributes, if any, to support correct name resolution in the correct lexical scope under the macros.

Also, `#[pointee]` is moved into the scope under `derive(SmartPointer)`.

cc `@Darksonn` `@davidtwco`

Hash Ipv*Addr as an integer

The `Ipv4Addr` and `Ipv6Addr` structs always have a fixed size, but directly derive `Hash`. This causes them to call the bytestring hasher implementation, which adds extra work for most hashers. This PR converts the internal representation to a fixed-width integer before passing to the hasher to prevent this.

…=aDotInTheVoid

Add possibility to generate rustdoc JSON output to stdout

Fixes rust-lang#127165.

I think it's likely common to want to get rustdoc json output directly instead of reading it from a file so I added this option to allow it. It's unstable and only works with `--output-format=json`.

r? `@aDotInTheVoid`

Update books

## rust-lang/book

7 commits in 67fa536768013d9d5a13f3a06790521d511ef711..04bc1396bb857f35b5dda1d773c9571e1f253304
2024-07-31 13:19:44 UTC to 2024-07-16 18:18:38 UTC

- mdbook-trpl-listing: Add missing elided lifetimes (rust-lang/book#3995)
- infra: include ghp-import and git push in generate-preview script (rust-lang/book#3998)
- infra: add robots.txt for GH Pages previews (rust-lang/book#3997)
- Clarify function definitions vs. expressions (rust-lang/book#3870)
- infra: fix some shellcheck issues in CI config (rust-lang/book#3988)
- infra: support test renderer in mdbook preprocessors (rust-lang/book#3982)
- Improve handling of `<Listing>`s (rust-lang/book#3975)

## rust-lang/edition-guide

4 commits in 5454de3d12b9ccc6375b629cf7ccda8264640aac..aeeb287d41a0332c210da122bea8e0e91844ab3e
2024-08-06 21:16:24 UTC to 2024-07-29 21:41:36 UTC

- Stabilize unsafe extern blocks (rust-lang/edition-guide#313)
- Add chapter for Lifetime Capture Rules 2024 (rust-lang/edition-guide#316)
- 2024: Add page for missing_fragment_specifier (rust-lang/edition-guide#315)
- Add documentation for 2024 prelude migration. (rust-lang/edition-guide#314)

## rust-lang/nomicon

3 commits in 0ebdacadbda8ce2cd8fbf93985e15af61a7ab895..6ecf95c5f2bfa0e6314dfe282bf775fd1405f7e9
2024-08-11 16:55:29 UTC to 2024-08-09 23:25:22 UTC

- Stabilize `min_exhaustive_patterns` (rust-lang/nomicon#445)
- repr(int) enums: both size and sign matter (rust-lang/nomicon#458)
- Update what-unsafe-does.md (rust-lang/nomicon#457)

## rust-lang/reference

6 commits in 2e191814f163ee1e77e2d6094eee4dd78a289c5b..62cd0df95061ba0ac886333f5cd7f3012f149da1
2024-08-11 21:06:12 UTC to 2024-07-30 06:34:03 UTC

- Reformat (and only reformat) the inline assembly chapter (rust-lang/reference#1550)
- Changes for unsafe extern blocks (RFC 3484) (rust-lang/reference#1536)
- Stabilize Wasm relaxed SIMD (rust-lang/reference#1421)
- Remove custom blockquote styling (rust-lang/reference#1547)
- Fix std-links for generics with commas. (rust-lang/reference#1549)
- Add details on how names are introduced. (rust-lang/reference#1052)

## rust-lang/rust-by-example

3 commits in 89aecb6951b77bc746da73df8c9f2b2ceaad494a..8f94061936e492159f4f6c09c0f917a7521893ff
2024-08-06 17:25:35 UTC to 2024-07-16 20:58:25 UTC

- Update lifetime_bounds.md (rust-lang/rust-by-example#1869)
- Remove the link to Japanese translation (rust-lang/rust-by-example#1868)
- Add an example of implementing the FromStr trait for Circles. (rust-lang/rust-by-example#1865)

## rust-lang/rustc-dev-guide

12 commits in 0c4d55cb59fe440d1a630e4e5774d043968edb3f..43d83780db545a1ed6d45773312fc578987e3968
2024-08-08 17:54:27 UTC to 2024-07-19 07:15:12 UTC

- Added 'the' in chapter "Running test" subtitle "Run unit tests on the compiler/library" (rust-lang/rustc-dev-guide#2040)
- Correct rust code block in *Dataflow Analysis* (rust-lang/rustc-dev-guide#2037)
- linkcheck: fix filtering of the source files (rust-lang/rustc-dev-guide#2019)
- chore: fix some comments (rust-lang/rustc-dev-guide#2028)
- linkcheck: fix reported broken links (part 2) (rust-lang/rustc-dev-guide#2024)
- typo (rust-lang/rustc-dev-guide#2029)
- Fix broken links in `llvm-coverage-instrumentation.md` (rust-lang/rustc-dev-guide#2027)
- Fix invalid link to toolstate documentation (rust-lang/rustc-dev-guide#2021)
- linkcheck: fix reported broken links (part 1) (rust-lang/rustc-dev-guide#2022)
- fix link (rust-lang/rustc-dev-guide#2020)
- MIR docs: fix borked links and update style (rust-lang/rustc-dev-guide#2017)
- Update adding.md (rust-lang/rustc-dev-guide#2016)

Use `append` instead of `extend(drain(..))`

The first commit adds `IndexVec::append` that forwards to `Vec::append`, and uses it in a couple places.

The second commit updates `indexmap` for its new `IndexMap::append`, and also uses that in a couple places.

These changes are similar to what [`clippy::extend_with_drain`](https://rust-lang.github.io/rust-clippy/master/index.html#/extend_with_drain) would suggest, just for other collection types.

…obzol

Fix dependencies cron job

This fixes a mistake in rust-lang#127786 that broke the dependencies update cron job. I accidentally set the wrong path in the cargo command.