Quoth Arjun Comar
Richard, If you create a straight C header that's able to call into the C++ library then what you're trying to do will work. This is the standard (though frustrating) approach to using C++ libraries within Haskell. I can send you an example cabal file for building the Haskell code against the C headers and archives if you'd like. There isn't much more to it than what you're already doing though. The key is that the headers have to be pure C and you have to force cabal to build the C code with g++ (since the implementing .c files will necessarily make C++ calls).
This is probably an absurdly elementary question, but at this last point, "... force cabal to build the C code with g++ ...", wouldn't this happen automatically, since they'll really be .C, not .c, files? E.g., in Blegger.hsc (#include "blegger.h") Blegger_stub.c (C code created by hsc2hs) blegger.h (C include file) blegger.C (extern "C" { #include "blegger.h" }) ... _stub.c shouldn't need g++, and .C should get it naturally? Donn