[Haskell-cafe] With cabal.project, what's the story about warning and -Werror compiler flags?

[Mikolaj Konarski]

> I was under the impression (but could be mistaken) that Cabal doesn't
> show warnings while building dependencies.

I don't remember, either, and it depends on commandline options,
but I think it does show the full log at least when a dependency
fails to compile.

> Not that I could find. I should work on a minimal reproducible test-
> case and file something.

Yes, thank you, please do.

> - Keep warnings in package.cabal ghc-options/cc-options etc
> - Add -Werror in cabal.project so things fail on dev machines
> - Configure HaskellCI to have -Werror as well, given a no-warnings
> policy

Brutal but effective. :)