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authorbors <bors@rust-lang.org>2023-11-22 07:31:13 +0000
committerbors <bors@rust-lang.org>2023-11-22 07:31:13 +0000
commit855c6836b7c476385db95a0a95f2e57f5ff32fe1 (patch)
tree33f19f3af45e575b49a708469fdfcbc2da7ea58b /compiler/rustc_llvm/llvm-wrapper/Linker.cpp
parentcc4bb0de204516c2852f70df0f3849e542e2c95e (diff)
parent54c122ec0d45799e795f8b2aca38227ce9b05fa5 (diff)
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Auto merge of #118071 - Urgau:check-cfg-cargo-feature, r=petrochenkov
Remove `feature` from the list of well known check-cfg name

This PR removes `feature` from the list of well known check-cfg.

This is done for multiple reasons:
 - Cargo is the source of truth, rustc shouldn't have any knowledge of it
 - It creates a conflict between Cargo and rustc when there are no features defined.
   In this case Cargo won't pass any `--check-cfg` for `feature` since no feature will ever be passed, but rustc by having in it's list adds a implicit `cfg(feature, values(any()))` which is completely wrong. Having any cfg `feature` is unexpected not allow any `feature` value.

While doing this, I took the opportunity to specialise the diagnostic a bit for the case above.

r? `@petrochenkov`
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