rust/compiler/rustc_lint_defs
Matthias Krüger 57be141f8a
Rollup merge of #128784 - tdittr:check-abi-on-fn-ptr, r=compiler-errors
Check ABI target compatibility for function pointers

Tracking issue: https://github.com/rust-lang/rust/issues/130260
Related tracking issue: #87678

Compatibility of an ABI for a target was previously only performed on function definitions and `extern` blocks. This PR adds it also to function pointers to be consistent.

This might have broken some of the `tests/ui/` depending on the platform, so a try run seems like a good idea.

Also this might break existing code, because we now emit extra errors. Does this require a crater run?

# Example
```rust
// build with: --target=x86_64-unknown-linux-gnu

// These raise E0570
extern "thiscall" fn foo() {}
extern "thiscall" { fn bar() }

// This did not raise any error
fn baz(f: extern "thiscall" fn()) { f() }
```

# Open Questions
* [x] Should this report a future incompatibility warning like #87678 ?
* [ ] Is this the best place to perform the check?
2024-10-12 23:00:55 +02:00
..
src Rollup merge of #128784 - tdittr:check-abi-on-fn-ptr, r=compiler-errors 2024-10-12 23:00:55 +02:00
Cargo.toml Clean up rustc_*/Cargo.toml. 2023-10-30 08:46:02 +11:00