emit rustc-check-cfg only on rust 1.80+ #4168
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davidhewitt
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Makes sense. I thought I tested it when i added them in #4163, and didn't see anything. But I can reproduce this as well (and there also in the CI log), so I guess I'm misremembering or something 🤷 . Given that we now check the rustc version we can maybe also switch to the cargo:: (double colon) variant, which is preferred since 1.77.
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Ah, looks like cargo explicitly rejects that due to the lower msrv. I guess I'll drop that second commit and merge? |
pyo3-build-config/src/lib.rs
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| pieces.next()?.parse().ok() | ||
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| .clone() |
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Clippy also appears to be unhappy about this clone call:
As a short-team solution yes, but I think Cargo is a bit overzealous here as they statically second-guess code which can adjust itself at runtime. Will the old format ever be phased out? What if the range between the current version and our MSRV saddles that release and we have to dynamically adjust? |
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Agreed, I asked about this in rust-lang/cargo#13868 (comment) |
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Testing on MSRV just now I got a lot of build warnings on the console:
... so I guess let's gate these behind a version check.