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bors d18506299b Auto merge of #133417 - RalfJung:aarch64-float-abi, r=workingjubilee 
reject aarch64 target feature toggling that would change the float ABI

~~Stacked on top of https://github.com/rust-lang/rust/pull/133099. Only the last two commits are new.~~

The first new commit lays the groundwork for separately controlling whether a feature may be enabled or disabled. The second commit uses that to make it illegal to *disable* the `neon` feature (which is only possible via `-Ctarget-feature`, and so the new check just adds a warning). Enabling the `neon` feature remains allowed on targets that don't disable `neon` or `fp-armv8`, which is all our built-in targets. This way, the entire PR is not a breaking change.

Fixes https://github.com/rust-lang/rust/issues/131058 for hardfloat targets (together with https://github.com/rust-lang/rust/pull/133102 which fixed it for softfloat targets).

Part of https://github.com/rust-lang/rust/issues/116344.
2024-12-15 16:32:03 +00:00
..
src Auto merge of #133417 - RalfJung:aarch64-float-abi, r=workingjubilee 2024-12-15 16:32:03 +00:00
Cargo.toml Remove jobserver from Session 2024-12-13 10:21:22 +00:00
messages.ftl fix: rust-lang/rust#47446 2024-11-15 15:25:19 +01:00
README.md mv compiler to compiler/ 2020-08-30 18:45:07 +03:00

README.md

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