Data.ByteString in base fails to build?

[Donald Bruce Stewart]

Malcolm.Wallace:
> Hi,
> 
> I'm just building ghc from scratch with the latest darcs sources, and
> getting a build failure on Data.ByteString in the base package.  The
> error is multiple copies of
> 
>      Data/ByteString.hs:301:14: Not in scope: `empty'
> 
> at different locations.  Indeed, the module does appear to both export
> "empty" and use it many times, but does not define it.
> 
> Regards,
>     Malcolm

Hmm. Should be in Data.ByteString.Base. 

    -- | /O(1)/ The empty 'ByteString'
    empty :: ByteString
    empty = PS nullForeignPtr 0 0

It's in my copy. Is it possible your shadow build directory hasn't
sym linked libraries/base/Data/ByteString/Base.hs ?

-- Don