[Haskell-cafe] ghc 7.2.1 Generics problem

[Magicloud Magiclouds]

Hi,
  I do not know why, my ghc 7.2.1 does not seem to support
DeriveRepresentable. I compiled the ghc 7.2.1 myself by ghc 7.0.4. All
options default.

$ ghc Types/TopTalkerRecord.hs

Types/TopTalkerRecord.hs:2:14:
    Unsupported extension: DeriveRepresentable

$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.2.1
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