The bzip2-1.0.5 distribution does not directly support creating DLLs.
In order to re-create the DLL included in the Ice distribution, apply
the patch bzlib.patch to the bzlib.h header and run the following
command

  nmake /f Makefile.mak

using the supplied Makefile.mak file. This will build the release and
debug versions of the bzip2 DLLs.
