This greatly simplifies how hard it is to set a custom bug report url; previously tools had to copy
the entire hook implementation.

- Switch clippy to the new hook

  This also adds a `extra_info` callback so clippy can include its own version number, which differs
  from rustc's.

- Call `install_ice_hook` in rustfmt

we never reach the code checking for this flag while the
flag is enabled, so it does not change the behavior
of the code.

So they match the order in the `Decoder` trait.

In rust-lang#110927 the encode/decode methods for `i8`, `char`, `bool`, and `str`
were made inherent. This commit removes some unnecessary implementations
of these methods that were missed in that PR.

`MemEncoder` was recently removed, leaving `FileEncoder` as the only
encoder. So this prefix is no longer needed, and `write_leb128!` matches
the existing `read_leb128!`.

Make them generate the entire function, not just the function body.

This is needed to build libunwind for LLVM 16:
https://discourse.llvm.org/t/runtimes-removed-support-for-llvm-enable-projects-in-libcxx-libcxxabi-and-libunwind/65707

Doesn't work: with this, running `python3 x.py dist` produces a tar
archive that still doesn't contain the runtimes subdirectory?

…ter, r=oli-obk

Add deployment-target --print flag for Apple targets

This is very useful for crates that need to know what the Apple OS deployment target is for their build scripts or inside of a build environment. Right now, the defaults just get copy/pasted around the ecosystem since they've been stable for so long. But with rust-lang#104385 in progress, that won't be true anymore and everything will need to move. Ideally whenever it happens again, this could be less painful as everything can ask the compiler what its default is instead.

To show examples of the copy/paste proliferation, here's some crates and/or apps that do:
- [cc](https://github.com/rust-lang/cc-rs/pull/708/files), Soon
-  [mac-notification-sys](https://github.com/h4llow3En/mac-notification-sys/pull/46/files#diff-d0d98998092552a1d3259338c2c71e118a5b8343dd4703c0c7f552ada7f9cb42R10-R12)
- [PyO3](https://github.com/PyO3/maturin/blob/ccb02d1aa1cc41e82a3572a3c8b35cace15f3e78/src/target.rs#L755-L758)
- [Anki](https://github.com/ankitects/anki/blob/613b5c1034cc9943f3f68d818ae22b2e0acec877/build/runner/src/bundle/artifacts.rs#L49-L54)
- [jsc-rs](https://github.com/Brooooooklyn/jsc-rs/blob/37767267568fb2de62fc441473e7d158dd980520/xtask/src/build.rs#L402-L405)
... and probably more that a simple GitHub codesearch didn't see

…r-errors

Implement RFC 3348, `c"foo"` literals

RFC: rust-lang/rfcs#3348
Tracking issue: rust-lang#105723

Make the BUG_REPORT_URL configurable by tools

This greatly simplifies how hard it is to set a custom bug report url; previously tools had to copy
the entire hook implementation.

I haven't changed clippy in case they want to make the change upstream instead of the subtree, but
I'm happy to do so here if the maintainers want - cc ``@rust-lang/clippy``

Fixes rust-lang#109486.

…=oli-obk

Migrate `mir_transform` to translatable diagnostics

cc rust-lang#100717

cleanup nll generalizer

followup to rust-lang#108861

…anups, r=cjgillot

Still more encoder cleanups

r? `@cjgillot`

bootstrap: add llvm-project/runtimes to the sources

This is needed to build libunwind for LLVM 16:
https://discourse.llvm.org/t/runtimes-removed-support-for-llvm-enable-projects-in-libcxx-libcxxabi-and-libunwind/65707

Zulip thread: https://rust-lang.zulipchat.com/#narrow/stream/187780-t-compiler.2Fwg-llvm/topic/missing.20llvm-project.2Fruntimes.20in.20beta.20srcs

Checked by running `x.py dist` and verifying the produced source archive (build/dist/rustc-1.71.0-dev-src.tar.gz) contains the new directory.

Fixup "since" dates for `array_tuple_conv` feature

Fixes a mistake from rust-lang#97594