What build environments should Cabal support?

[Johan Tibell]

On Fri, Dec 14, 2012 at 3:51 PM, Duncan Coutts
<duncan.coutts at googlemail.com> wrote:
> We should distinguish the compilers that can build Cabal, from those
> that cabal supports. Cabal supports several compilers that cannot
> themselves build Cabal.
>
> I am happy to drop the support for building Cabal using hugs and nhc
> as I don't believe they have been used for some years.
>
> In particular this will let us fully use new-style IO exceptions, and
> the new createProcess function.

Sounds good. Lets remove any __HUGS__ and __NHC__ ifdefs then!