This is a tracking issue for: - https://github.com/rust-lang/rfcs/pull/3722 The feature gate for the issue is `#![feature(explicit_extern_abis)]`. ### About tracking issues Tracking issues are used to record the overall progress of implementation. They are also used as hubs connecting to other relevant issues, e.g., bugs or open design questions. A tracking issue is however *not* meant for large scale discussion, questions, or bug reports about a feature. Instead, open a dedicated issue for the specific matter and add the relevant feature gate label. ### Steps - [x] Accept an RFC. - https://github.com/rust-lang/rfcs/pull/3722 - [x] Add migration lint. - https://github.com/rust-lang/rust/pull/132357 - [x] Make and FCP the change to warn-by-default in all editions. - https://github.com/rust-lang/rust/pull/132397 - [ ] Make this a hard error in the next edition on nightly under a feature flag. - Blocked on finalizing the name and timing of the next edition. - https://github.com/rust-lang/rust/pull/135340 - [ ] Add documentation to the [dev guide][]. - See the [instructions][doc-guide]. - [ ] Add documentation to the [reference][]. - See the [instructions][reference-instructions]. - [ ] Add formatting for new syntax to the [style guide][]. - See the [nightly style procedure][]. - [ ] Stabilize on nightly on the next edition. - See the [instructions][stabilization-instructions]. [dev guide]: https://github.com/rust-lang/rustc-dev-guide [doc-guide]: https://rustc-dev-guide.rust-lang.org/stabilization_guide.html#documentation-prs [edition guide]: https://github.com/rust-lang/edition-guide [nightly style procedure]: https://github.com/rust-lang/style-team/blob/master/nightly-style-procedure.md [reference]: https://github.com/rust-lang/reference [reference-instructions]: https://github.com/rust-lang/reference/blob/master/CONTRIBUTING.md [stabilization-instructions]: https://rustc-dev-guide.rust-lang.org/stabilization_guide.html#stabilization-pr [style guide]: https://github.com/rust-lang/rust/tree/master/src/doc/style-guide ### Unresolved Questions None. ### Related TODO. ### Implementation history TODO.