Re: [Haskell-cafe] How to use cabal's data-files feature and run in-place?

On Thu, Apr 21, 2011 at 11:27:10PM -0500, Antoine Latter wrote:

2. Here's what I do for the paths situation:

In the package description, create a CPP option so you know you're compiling via Cabal:

...

Cpp-options: -DCABAL

Then create a module to wrap around the autogenerated paths module, making sure to put the CPP Language pragma at the top:

...

{-# LANGUAGE CPP #-}

You can then use #ifdef CABAL to decide to re-export the Cabal autogenerated paths functionality, or to use the ones you've written yourself (based on the current directory or whatever you need).

I hope that this helps! I don't have any examples on hand at the moment.

Thanks -- works like a charm! I'm particularly pleased to see that ghci supports cpp. Richard