DLL support with GHC

Hi, What is the current status of shared object support within GHC? Using GHC 6.10.2 (or the branch for it) I can create DLL's under Windows, following these instructions: http://www.haskell.org/ghc/docs/latest/html/users_guide/win32-dlls.html .Can a similar thing be done under Linux? If so, where is this documented? Many thanks Neil