Warning spam in aarch64-darwin

[Sciencentistguy]

While building on macOS this message: 'apple-a7' is not a recognized processor for this target (ignoring processor) appears many times.

My research shows that this is because something is passing some -march flag to clang somewhere and it is not regocnising the name of the processor, but i'm not sure where to go from here.

[angerman]

I've seen this occasionally as well (not in my projects though), this should not happen, picking apple-a7 is wrong. Do you have a reproducer for this?

[Sciencentistguy]

It happens here: https://github.com/Sciencentistguy/AdventOfCode/tree/9c242a0941c5f6d7fd128bc0b08392cab4b0e341/2021/Haskell

This is on an M1 Max Macbook Pro.

[cptmikx]

Happens on my M1 Macbook Pro (2020) as well. I get tons of those messages

[asivitz]

I'm getting this as well.

[asivitz]

In the ghc source, I find this line in the generated llvm-targets:

40:,("aarch64-apple-darwin", ("e-m:o-i64:64-i128:128-n32:64-S128", "apple-a7", "+fp-armv8 +neon +crypto +zcm +zcz +sha2 +aes"))

Maybe that's a clue?

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