[Haskell] ANNOUNCE: GHC version 7.8.3

[Miëtek Bak]

>> haddock 2.14.3 that ships with it seems to be quite broken. Perhaps it's a
>> bad interaction with cabal, it's hard to say from the outside, but here are
>> some details.
>> 
>> Here's the kind of error I get from haddock when I try to use cabal to
>> install a package (primitive, in this case):
>> 
>>    module ‘primitive-0.5.3.0:Main’ is defined in multiple files:
> 
> I can't reproduce that here with a ghc-7.8.3/haddock-2.14.3 install on
> Linux. However, this sounds *alot* like a Clang/CPP issue, specifically
> 
> https://github.com/haskell/cabal/issues/1740#issuecomment-39559026

This is a Clang/CPP issue.  A workaround is to pass `—ghc-options=-optP-P` to `cabal haddock`.

The corresponding GHC issue was closed 5 weeks ago:
https://ghc.haskell.org/trac/ghc/ticket/9174


-- 
Miëtek