I apologize if this is the wrong mailing list to turn to, but I would be grateful for any help with two problems I have when trying to add a package to GHCi. (I wasn't able to find sufficient information in the documentation for packages http://www.haskell.org/ghc/docs/latest/html/users_guide/packages.html.) (1) When I try to add a package to ghc, I receive the error message that a GHCi lib fil cannot be found.
ghc-pkg -u -i fgl.pkg Reading package info from "fgl.pkg"done. Expanding embedded variables... done. warning: can't find GHCi lib `HSfgl.o' Saving old package config file... done. Writing new package config file... done.
The missing file `HSfgl.o' is located on the current directory as well as in the directory where all other .o and .a files for GHC are kept (/usr/local/lib/ghc-6.2/). (2) Maybe related to the previous problem is the following. When I start "ghci -package fgl", I receive the following error message: Loading package base ... linking ... done. Loading package haskell98 ... linking ... done. Loading package haskell-src ... linking ... done. Loading package fgl ... GHCi runtime linker: fatal error: I found a duplicate definition for symbol __module_registered whilst processing object file /usr/local/lib/ghc-6.2/HSfgl.o This could be caused by: * Loading two different object files which export the same symbol * Specifying the same object file twice on the GHCi command line * An incorrect `package.conf' entry, causing some object to be loaded twice. GHCi cannot safely continue in this situation. Exiting now. Sorry. Any help is greatly appreciated. Thanks, Martin