Re: [Haskell-cafe] Problems building lambdabot on osx

From: Brandon Allbery

On Mon, Aug 8, 2011 at 21:38, Adam Turoff wrote:

...

First, there's the issue with linking against libiconv, which is solved this way:

       cabal install --extra-lib-dirs=/usr/lib

That leaves a whole mess of link errors against libHSreadline:

Yes, because now it's finding the system readline, which isn't actually readline (Apple ships a "readline" which is actually BSD "editline", so you get missing symbols for things editline doesn't support such as completion).  I think you'll need to temporarily deactivate MacPorts' iconv instead of using --extra-lib-dirs.

This can't really be fixed by either GHC or MacPorts; there doesn't seem to be a good solution as yet, although the MacPorts folks may end up implementing a hacky solution because Apple has introduced *another* MacPorts-breaking library conflict in Lion (libnotify).

Yep, this is Apple's problem and everyone else just has to put up with it. If you want to mix macports and a non-macports ghc, I think the best solution is to self-compile ghc against the macports libiconv. This is easy, just configure ghc with ./configure --with-iconv-includes=/opt/local/include --with-iconv-libraries=/opt/local/lib I haven't had a problem since I started building ghc this way (10.5 and 10.6). John L.