It might help to add -optc-m32 -opta-m32 -optl-m32 to /usr/bin/ghci, too. (TH uses ghci) Cheers Christian Brian Sniffen wrote:

Having edit the Haskell Platform's /usr/bin/ghc in place, most packages install fine. I'm still having trouble with Pandoc, even given the advice:

...

Once cabal works, options --ld-option=-m32 (and also --gcc-option=-m32) may be used. These options may also be passed to "./Setup configure"

The problem appears to come when linking an incompatible zlib version:

src/Text/Pandoc/ODT.hs:49:26: Exception when trying to run compile-time code: user error (Codec.Compression.Zlib: incompatible zlib version) Code: ($) makeZip "data" "odt-styles" In the first argument of `read', namely `$(makeZip $ "data" "odt-styles")' In the expression: read ($(makeZip $ "data" "odt-styles")) In the definition of `refArchive': refArchive = read ($(makeZip $ "data" "odt-styles"))

I do have a universal zlib installed by MacPorts, as well as the universal zlib that shipped with Snow Leopard and the universal zlib that came with Cabal. I'm not sure whether this message indicates that TH code is searching a different library path than non-TH code or what. Advice is most welcome.