rust/compiler/rustc_codegen_ssa at 7bf810e17627232e03c9ff30d895807150fe567b - rust

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Guillaume Gomez 8bf58ee5d4 Rollup merge of #155962 - romancardenas:cfg-only-stable-target-feature, r=RalfJung

`rustc`: `target_features`: allow for `cfg`-only stable `target_features`

This PR introduces a new stabilization level for `target_features`: `CfgOnlyStable`. The motivation is allowing the Rust compiler to expose `target_features` of targets so users can use `cfg(target_feature = "feature")` for conditional blocks depending on target features. However, `CfgOnlyStable` cannot be used for `#[target_feature(enable = "feature")]`, as this is still considered unstable. Accordingly, the compiler will still raise an error if these expressions are used on stable.

This PR relates partially to rust-lang/rust#150257. As discussed, for RISC-V targets, having the `"d"`, `"e"`, and `"f"` target features exposed will allow baremetal developers to adapt the code depending on the target's properties.

r? @RalfJung

2026-05-05 02:50:08 +02:00

src

Rollup merge of #155962 - romancardenas:cfg-only-stable-target-feature, r=RalfJung

2026-05-05 02:50:08 +02:00

Cargo.toml

Port rustc_expected_cgu_reuse to the new attribute parser

2026-02-10 10:10:38 +01:00

README.md

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README.md

Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.