How to disable `-flocal-float-out`?

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1

Trying to use -fno-local-float-out results in “ghc-9.4.8: unrecognised flag: -fno-local-float-out”. And sure enough it doesn’t seem to exist if I run ghc --show-options | grep -e '-fno-local-float-out'. The documentation references fno-local-float-out in 5.3. Optimisation (code improvement) — Glasgow Haskell Compiler 9.12.1 User's Guide , what gives?

For context, I’m working on my own haskell-like language and I’d want to benchmark it against ghc, and I want to disable statically discoverable rearrangement optimizations which I don’t have yet to get a better apples-to-apples comparison of the runtime.

2

sorry, seems I just needed to update my ghc version. I saw reference to a paper from 96 and somehow assumed this flag was present for long time, but it actually wasn’t. My mistake

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Great to see you’ve figured it out. It would be nice if compiler flags also listed in which version they were introduced to avoid this kind of confusion.

Edit: some options do have a since: field, it would be nice if that was done more consistently.

That sounds interesting. Please do post something about it here in the future!