Tracking issue for MCP 994: Add `-Zllvm-target-feature` target *modifier* to directly set LLVM-level target features, and deprecate doing that with `-Ctarget-feature`

[rustbot]

This is a tracking issue for MCP "Add -Zllvm-target-feature target modifier to directly set LLVM-level target features, and deprecate doing that with -Ctarget-feature" (rust-lang/compiler-team#994).

Note

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Instead, open a dedicated issue for the specific matter, link to this tracking issue and ping the MCP author.
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Steps

• Implement the MCP
• Adjust the documentation
  • In the Rust Compiler Development Guide if applicable (e.g., for refactorings)
  • In the Rust Forge if applicable (e.g., for policy changes)
  • In the rustc book if applicable (e.g., for target tier or CLI changes)
  • In the Unstable Book if applicable (e.g., for unstable CLI changes)

Unresolved questions

None so far.

Implementation history

Empty so far.

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@RalfJung, consider @rustbot claim'ing the work.