Cannot install readline on Mac OS X

After a recent upgrade of Mac OS X from Tiger to Snow Leopard, I installed the Haskell Platform. I installed genuine readline using MacPorts. Now I cannot install the readline package, due to the well-known problem that configure finds the fake readline that comes with Mac OS X and refuses to proceed. I have tried the various solutions suggested in: http://hackage.haskell.org/trac/ghc/ticket/3121 http://www.haskell.org/pipermail/libraries/2009-May/011595.html http://hackage.haskell.org/trac/hackage/ticket/631 and various combinations of them. Nothing helped, the same problem always occurred. Any new ideas? Thanks, Yitz