GHCi on Mac OS X

[Felix Reckers]

When I start the ghci with -package data, I get the following output:

Loading package base ... linking ... done.
Loading package haskell98 ... linking ... done.
Loading package lang ... linking ... done.
Loading package concurrent ... linking ... done.
Loading package posix ... linking ... done.
Loading package util ... linking ... not found: _rl_funmap_names
Abort

I know that I must install the readline library seperately; can anybody 
tell me how to do this?

Felix Reckers