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Remove i586-pc-windows-msvc
See [MCP 840](https://github.com/rust-lang/compiler-team/issues/840).
I left a specialized error message that should help users that hit this in the wild (for example, because they use it in their CI).
```
error: Error loading target specification: the `i586-pc-windows-msvc` target has been removed. Use the `i686-pc-windows-msvc` target instead.
Windows 10 (the minimum required OS version) requires a CPU baseline of at least i686 so you can safely switch. Run `rustc --print target-list` for a list of built-in targets
```
``@workingjubilee`` ``@calebzulawski`` fyi portable-simd uses this target in CI, if you wanna remove it already before this happens
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Add minimal platform support documentation for powerpc-unknown-linux-gnuspe
Per https://github.com/rust-lang/rust/pull/137860#issuecomment-2692358259, add minimal platform support documentation, including a brief summary and links to more detailed information about this target.
The added documentation is minimal. This is somewhat similar to [powerpc-unknown-openbsd, which also has no target maintainer](https://doc.rust-lang.org/nightly/rustc/platform-support/powerpc-unknown-openbsd.html). The rest of the template is left to target maintainers.
I also updated powerpc-unknown-linux-muslspe platform support documentation and added link to powerpc-unknown-linux-gnuspe platform support documentation.
cc ```@glaubitz```
cc ```@BKPepe```
r? workingjubilee
```@rustbot``` label +O-PowerPC
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Match Ergonomics 2024: add context and examples to the unstable book
The examples here are pretty limited and don't illustrate the differences between the two feature gates, but my hope is that they get the general idea across. I can try and add some more nuance or more comprehensive examples too if that would help.
Hopefully the doctest isn't too sneaky. I wanted to make the bindings' types explicit, and the most readable way I could think of was to use a helper.
~~Unfortunately it looks like the "run this code" button doesn't work yet, but I made sure the examples are cross-edition, so that should resolve on its own once playground's nightly updates (or if playground's default becomes edition 2024, or if the edition in the markdown gets forwarded to playground).~~ It looks like the default edition on playground is now 2024, so the run button works! There's no output, but having a button to show that it compiles is nice, I think.
Relevant tracking issue: #123076
r? ``````@Nadrieril``````
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Remove unsizing coercions for tuples
See https://github.com/rust-lang/rust/issues/42877#issuecomment-2686010847 and below comments for justification.
Tracking issue: #42877
Fixes: #135217
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Retire the legacy `Makefile`-based `run-make` test infra
The final piece of [porting run-make tests to use Rust #121876](https://github.com/rust-lang/rust/issues/121876).
Closes #121876.
Closes #40713.
Closes #81791 (no longer using `wc`).
Closes #56475 (no longer a problem in current form of that test; we don't ignore the test on `aarch64-unknown-linux-gnu`).
### Summary
This PR removes the legacy `Makefile`-based `run-make` test infra which has served us well over the years. The legacy infra is no longer needed since we ported all of `Makefile`-based `run-make` tests to the new `rmake.rs` infra.
Additionally, this PR:
- Removes `tests/run-make/tools.mk` since no more `Makefile`-based tests remain.
- Updates `tests/run-make/README.md` and rustc-dev-guide docs to remove mention about `Makefile`-based `run-make` tests
- Update test suite requirements in rustc-dev-guide on Windows to no longer need MSYS2 (they should also now run successfully on native Windows MSVC).
- Update `triagebot.toml` to stop backlinking to #121876.
**Thanks to everyone who helped in this effort to modernize the `run-make` test infra and test suite!**
r? bootstrap
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Add `avr-none` to SUMMARY.md and platform-support.md
This was missed this in the implementation PR, so update the links here.
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Fix some typos
Fix some typos
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Support raw-dylib link kind on ELF
raw-dylib is a link kind that allows rustc to link against a library without having any library files present.
This currently only exists on Windows. rustc will take all the symbols from raw-dylib link blocks and put them in an import library, where they can then be resolved by the linker.
While import libraries don't exist on ELF, it would still be convenient to have this same functionality. Not having the libraries present at build-time can be convenient for several reasons, especially cross-compilation. With raw-dylib, code linking against a library can be cross-compiled without needing to have these libraries available on the build machine. If the libc crate makes use of this, it would allow cross-compilation without having any libc available on the build machine. This is not yet possible with this implementation, at least against libc's like glibc that use symbol versioning. The raw-dylib kind could be extended with support for symbol versioning in the future.
This implementation is very experimental and I have not tested it very well. I have tested it for a toy example and the lz4-sys crate, where it was able to successfully link a binary despite not having a corresponding library at build-time.
I was inspired by Björn's comments in https://internals.rust-lang.org/t/bundle-zig-cc-in-rustup-by-default/22096/27
Tracking issue: #135694
r? bjorn3
try-job: aarch64-apple
try-job: x86_64-msvc-1
try-job: x86_64-msvc-2
try-job: test-various
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This was missed this in the implementation PR, so update the links here.
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This reverts commit 6efacfb7a59ebde2620398861713fae136060a04.
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Signed-off-by: fuyangpengqi <995764973@qq.com>
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See MCP 840.
I left a specialized error message that should help users that hit this
in the wild (for example, because they use it in their CI).
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With the removal of `cfg(parallel_compiler)`, these are always shared
references and `std::sync::OnceLock`.
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doc: update Wasmtime flags
Wasmtime's `--wasm-features` and `--wasi-modules` flags have been renamed since these docs were initially written.
Additionally, from my testing I don't believe `--wasm threads` is needed if `--wasi threads` is passed already.
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Rewrite the `ci.py` script in Rust
It would seem that I would learn by now that any script written in Python will become unmaintainable sooner or later, but alas..
r? `@marcoieni`
try-job: aarch64-gnu
try-job: dist-x86_64-linux-alt
try-job: x86_64-msvc-ext2
Fixes: https://github.com/rust-lang/rust/issues/137013
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And remove outdated requirements to run `run-make` tests on Windows.
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Add missing case explanation for doc inlined re-export of doc hidden item
This case was not covered in the rustdoc book as uncovered in #137342.
r? ``@notriddle``
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Wasmtime's `--wasm-features` and `--wasi-modules` flags have been renamed
since these docs were initially written.
Additionally, from my testing I don't believe `--wasm threads` is needed if
`--wasi threads` is passed already.
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raw-dylib is a link kind that allows rustc to link against a library
without having any library files present.
This currently only exists on Windows. rustc will take all the symbols
from raw-dylib link blocks and put them in an import library, where they
can then be resolved by the linker.
While import libraries don't exist on ELF, it would still be convenient
to have this same functionality. Not having the libraries present at
build-time can be convenient for several reasons, especially
cross-compilation. With raw-dylib, code linking against a library can be
cross-compiled without needing to have these libraries available on the
build machine. If the libc crate makes use of this, it would allow
cross-compilation without having any libc available on the build
machine. This is not yet possible with this implementation, at least
against libc's like glibc that use symbol versioning.
The raw-dylib kind could be extended with support for symbol versioning
in the future.
This implementation is very experimental and I have not tested it very
well. I have tested it for a toy example and the lz4-sys crate, where it
was able to successfully link a binary despite not having a
corresponding library at build-time.
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Update books
## rust-lang/book
2 commits in d4d2c18cbd20876b2130a546e790446a8444cb32..4a01a9182496f807aaa5f72d93a25ce18bcbe105
2025-02-24 14:48:34 UTC to 2025-02-13 19:29:47 UTC
- Fix typos in chapter 17 (rust-lang/book#4238)
- NoStarch backports (rust-lang/book#4224)
## rust-lang/edition-guide
2 commits in 8dbdda7cae4fa030f09f8f5b63994d4d1dde74b9..daa4b763cd848f986813b5cf8069e1649f7147af
2025-02-22 14:58:51 UTC to 2025-02-21 02:30:17 UTC
- Remove precise capturing features (rust-lang/edition-guide#362)
- use same name as previous example (rust-lang/edition-guide#360)
## rust-lang/nomicon
1 commits in 336f75835a6c0514852cc65aba9a698b699b13c8..8f5c7322b65d079aa5b242eb10d89a98e12471e1
2025-02-19 13:16:47 UTC to 2025-02-19 13:16:47 UTC
- other-reprs: do not make it sound like we are making ABI promises for repr(int) enums (rust-lang/nomicon#461)
## rust-lang/reference
4 commits in 6195dbd70fc6f0980c314b4d23875ac570d8253a..615b4cec60c269cfc105d511c93287620032d5b0
2025-02-18 23:01:53 UTC to 2025-02-13 15:12:49 UTC
- Add rule identifiers to names chapters (rust-lang/reference#1737)
- Switch from AVX to SSE in the example (rust-lang/reference#1735)
- Remove attributes from struct field rest patterns (rust-lang/reference#1736)
- Update reference for target_feature_11. (rust-lang/reference#1720)
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Co-authored-by: DianQK <dianqk@dianqk.net>
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stabilize stage management for rustc tools
https://github.com/rust-lang/rust/pull/135990 got out of control due to excessive complexity. This PR aims to achieve the same goal with a simpler approach, likely through multiple smaller PRs. I will keep the other one read-only and open as a reference for future work.
This work stabilizes the staging logic for `ToolRustc` programs, so you no longer need to handle build and target compilers separately in steps. Previously, most tools didn't do this correctly, which was causing the compiler to be built twice (e.g., `x test cargo --stage 1` would compile the stage 2 compiler before, but now it only compiles the stage 1 compiler).
I also tried to document how we should write `ToolRustc` steps as they are quite different and require more attention than other tools.
Next goal is to stabilize how stages are handled for the rustc itself. Currently, `x build --stage 1` builds the stage 1 compiler which is fine, but `x build compiler --stage 1` builds stage 2 compiler.
~~for now, r? ghost~~
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r=GuillaumeGomez
rustdoc book: acknowledge --document-hidden-items
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Make x86 QNX target name consistent with other Rust targets
Rename target to be consistent with other Rust targets: Use `i686` instead of `i586`
See also
- #136495
- #109173
CC: `@jonathanpallant` `@japaric` `@gh-tr` `@samkearney`
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Update docs for default features of wasm targets
LLVM 20 enabled the `nontrapping-fptoint` and `bulk-memory` features by default, so this updates the corresponding documentation for the `wasm32-*` targets (which all point to `wasm32-unknown-unknown`).
Closes #137315 with a doc update for the doc part.
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Create a generic AVR target: avr-none
This commit removes the `avr-unknown-gnu-atmega328` target and replaces it with a more generic `avr-none` variant that must be specialized using `-C target-cpu` (e.g. `-C target-cpu=atmega328p`).
Seizing the day, I'm adding myself as the maintainer of this target - I've been already fixing the bugs anyway, might as well make it official 🙂
Related discussions:
- https://github.com/rust-lang/rust/pull/131171
- https://github.com/rust-lang/compiler-team/issues/800
try-job: x86_64-gnu-debug
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LLVM 20 enabled the `nontrapping-fptoint` and `bulk-memory` features by
default, so this updates the corresponding documentation for the
`wasm32-*` targets (which all point to `wasm32-unknown-unknown`).
cc #137315
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Rollup of 8 pull requests
Successful merges:
- #120580 (Add `MAX_LEN_UTF8` and `MAX_LEN_UTF16` Constants)
- #132268 (Impl TryFrom<Vec<u8>> for String)
- #136093 (Match Ergonomics 2024: update old-edition behavior of feature gates)
- #136344 (Suggest replacing `.` with `::` in more error diagnostics.)
- #136690 (Use more explicit and reliable ptr select in sort impls)
- #136815 (CI: Stop /msys64/bin from being prepended to PATH in msys2 shell)
- #136923 (Lint `#[must_use]` attributes applied to methods in trait impls)
- #137155 (Organize `OsString`/`OsStr` shims)
r? `@ghost`
`@rustbot` modify labels: rollup
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This commit removes the `avr-unknown-gnu-atmega328` target and replaces
it with a more generic `avr-none` variant that must be specialized with
the `-C target-cpu` flag (e.g. `-C target-cpu=atmega328p`).
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