[Haskell-cafe] literate Haskell newbie question

I am a newbie to literate Haskell and these are my two simple questions: How do I compile a literate haskell file foo.lhs (using ghc-6.6)? Is there a tool that translates foo.lhs to foo.hs? Surprisingly I don't find the answer in http://haskell.org/haskellwiki/Literate_programming whereas a lot about translation into tex-files can be found. Thanks, Immanuel