Hi, Sound similar to an issue I've run into. There is some additional information here: https://github.com/simonmar/alex/pull/33#issuecomment-27543618 This appears to occur in both happy and alex. Cheers, Corey -Corey O'Connor coreyoconnor@gmail.com http://corebotllc.com/ On Wed, Nov 13, 2013 at 6:29 PM, Nick Partridge wrote:

Hi,

I've hit a build failure when trying to build HEAD on Mavericks. I've logged a bug here with a lot of detail: https://ghc.haskell.org/trac/ghc/ticket/8528.

When using alex 3.1.2, some of the generated files have spaces preceding preprocessor statements, while alex 3.1.0 doesn't do this. I guess this is possibly an alex bug, but this is my first time building GHC so I'm not really sure how the ecosystem works :)

Huge shout-out to Carter S. for giving me a ton of help in nailing down this issue!

- Nick

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