Add LLVM compatibility information

[manishwalia15]

**

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @notriddle (or someone else) some time within the next two weeks.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

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[workingjubilee]

This is the wrong place to add this documentation.

Also, it is incorrect: we have removed LLVM 17 support.

[manishwalia15]

ok working on this

[workingjubilee]

r? @workingjubilee

[rust-log-analyzer]

The job mingw-check-tidy failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

COPY host-x86_64/mingw-check/validate-toolstate.sh /scripts/
COPY host-x86_64/mingw-check/validate-error-codes.sh /scripts/

# NOTE: intentionally uses python2 for x.py so we can test it still works.
# validate-toolstate only runs in our CI, so it's ok for it to only support python3.
ENV SCRIPT TIDY_PRINT_DIFF=1 python2.7 ../x.py test \
           --stage 0 src/tools/tidy tidyselftest --extra-checks=py:lint,cpp:fmt
# This file is autogenerated by pip-compile with Python 3.10
# by the following command:
#
#    pip-compile --allow-unsafe --generate-hashes reuse-requirements.in
---
#13 2.998 Building wheels for collected packages: reuse
#13 2.999   Building wheel for reuse (pyproject.toml): started
#13 3.246   Building wheel for reuse (pyproject.toml): finished with status 'done'
#13 3.247   Created wheel for reuse: filename=reuse-4.0.3-cp310-cp310-manylinux_2_35_x86_64.whl size=132715 sha256=dfa09868353292d98f811d3efdb0d54d07389e808efc71d68e3b93c514bf8bec
#13 3.247   Stored in directory: /tmp/pip-ephem-wheel-cache-nqxqd1c8/wheels/3d/8d/0a/e0fc6aba4494b28a967ab5eaf951c121d9c677958714e34532
#13 3.250 Installing collected packages: boolean-py, binaryornot, tomlkit, reuse, python-debian, markupsafe, license-expression, jinja2, chardet, attrs
#13 3.649 Successfully installed attrs-23.2.0 binaryornot-0.4.4 boolean-py-4.0 chardet-5.2.0 jinja2-3.1.4 license-expression-30.3.0 markupsafe-2.1.5 python-debian-0.1.49 reuse-4.0.3 tomlkit-0.13.0
#13 3.649 WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
#13 4.190 Collecting virtualenv
#13 4.190 Collecting virtualenv
#13 4.241   Downloading virtualenv-20.26.6-py3-none-any.whl (6.0 MB)
#13 4.451      ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 6.0/6.0 MB 28.8 MB/s eta 0:00:00
#13 4.495 Collecting distlib<1,>=0.3.7
#13 4.503   Downloading distlib-0.3.9-py2.py3-none-any.whl (468 kB)
#13 4.513      ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 469.0/469.0 KB 58.6 MB/s eta 0:00:00
#13 4.549 Collecting platformdirs<5,>=3.9.1
#13 4.555   Downloading platformdirs-4.3.6-py3-none-any.whl (18 kB)
#13 4.595 Collecting filelock<4,>=3.12.2
#13 4.602   Downloading filelock-3.16.1-py3-none-any.whl (16 kB)
#13 4.683 Installing collected packages: distlib, platformdirs, filelock, virtualenv
#13 4.874 Successfully installed distlib-0.3.9 filelock-3.16.1 platformdirs-4.3.6 virtualenv-20.26.6
#13 DONE 5.0s

#14 [7/8] COPY host-x86_64/mingw-check/validate-toolstate.sh /scripts/
#14 DONE 0.0s
---
DirectMap4k:      214976 kB
DirectMap2M:     9222144 kB
DirectMap1G:     9437184 kB
##[endgroup]
Executing TIDY_PRINT_DIFF=1 python2.7 ../x.py test            --stage 0 src/tools/tidy tidyselftest --extra-checks=py:lint,cpp:fmt
+ TIDY_PRINT_DIFF=1 python2.7 ../x.py test --stage 0 src/tools/tidy tidyselftest --extra-checks=py:lint,cpp:fmt
    Finished `dev` profile [unoptimized] target(s) in 0.04s
##[endgroup]
WARNING: `rust.download-rustc` is enabled. The `rust.channel` option will be overridden by the CI rustc's channel.
downloading https://static.rust-lang.org/dist/2024-09-22/rustfmt-nightly-x86_64-unknown-linux-gnu.tar.xz
---
fmt check
fmt: checked 5599 files
tidy check
tidy: Skipping binary file check, read-only filesystem
tidy error: /checkout/src/doc/rustdoc/src/how-to-read-rustdoc.md: too many trailing newlines (2)
removing old virtual environment
creating virtual environment at '/checkout/obj/build/venv' using 'python3.10'
Requirement already satisfied: pip in ./build/venv/lib/python3.10/site-packages (24.2)
All checks passed!
checking C++ file formatting
some tidy checks failed
some tidy checks failed
Command has failed. Rerun with -v to see more details.
  local time: Sat Oct 12 19:12:58 UTC 2024
  network time: Sat, 12 Oct 2024 19:12:58 GMT
##[error]Process completed with exit code 1.
Post job cleanup.