CUDD lacks an install target and a configure script, and so needs to be
setup by hand for your particular system. Examine:

	<hbdd toplevel>/cudd-2.4.1/Makefile

and adjust the compiler flags for your system. The defaults work fine
on Debian GNU/Linux x86 for me. Note it does not build a shared
library and so GHCi does not work.

I use the one from Macports under OS X.

The create-cudd-so.sh script creates a shared library that GHCi can
use from the CUDD static libraries.