testing cabal-install-0.25.2 with ghc-7.6.1

[Jens Petersen]

Hi,

I managed to build cabal-install-0.25.2 (from the cabal-1.16 branch)
with ghc-7.6.1 Cabal.

However the use of viewAsFieldDescr in
cabal-install/Distribution/Client/Config.hs
causes problems due to the:

  error "Command.optionToFieldDescr: feature not implemented"

in Cabal-1.16.0, so I am not able to use cabal-install yet:

  $ cabal install
  cabal: Command.optionToFieldDescr: feature not implemented

Jens