Overeager ghc-options -I warning

[lspitzner]

on 1.24.0.0

  ghc-options: {
    -rtsopts
    -with-rtsopts "-I0"
  }

gives

Warning: Instead of 'ghc-options: -I0' use 'include-dirs: 0'

I think some regex needs some tweaking there.

[ezyang]

Relevant code is in Cabal/Distribution/PackageDescription/Check.hs. Problem is that it just checks arguments one by one for things starting with -I; so it doesn't know -with-rtsopts grabs the next arg. Workaround: use an equals sign.

This might not be too easy to fix without reimplementing GHC's command line parser in Cabal. Maybe some extra heuristics could be employed.