Where to add GHC options?

[tsoernes]

I want to suppress unused top level functions. I have added
let g:ghcmod_ghc_options = ['-Wno-unused-top-binds']
to .vimrc, and to the ghcmod.vim files in
ghcmod-vim/after/ftplugin/lhaskell, ghcmod-vim/autoload and ghcmod-vim/plugin/, but it does not seem to work.

[DanielG]

You can also add these options to your cabal file or in an annotation directly into the haskell file(s) you want this to apply to.

For cabal:

ghc-options: -Wno-unused-top-binds

If you don't want this to apply to real builds you could add a flag, see https://www.haskell.org/cabal/users-guide/developing-packages.html#example-using-explicit-braces-rather-than-indentation-for-layout .

In a haskell file add this before module XXX where :

{-# OPTIONS_GHC -Wno-unused-top-binds #-}