Message: 10
Date: Wed, 3 Nov 2010 00:38:53 -0200
From: Victor Oliveira <rhapsodyv@gmail.com>

Hi,

Info:
ghc 6.12.3 (installed from haskell plataform)
Mac os x snow leopard 10.6.4
ffmpeg instaled from ports - ffmpeg @0.6.1
hs-ffmpeg 0.3.4 - installed from cabal-install

When I try compile this package, I get this erros:

-------------- next part --------------
Linking dist/build/tutorial01/tutorial01 ...
ld: warning: in /opt/local/lib//libavformat.dylib, file was built for unsupported file format which is not the architecture being linked (i386)

GHC only supports building 32-bit on OSX, but gcc on Snow Leopard defaults to 64-bit.

You need to build universal variants of libraries you want to link in Macports (and their dependencies). I think this is enabled by

port install ffmpeg UNIVERSAL=1

although you'll need to force ffmpeg (and everything it depends on) to rebuild.

John