Patch: support non-libffi enabled platforms

[Tom Tromey]

>>>>> "Anthony" == Anthony Green <green@cygnus.com> writes:

Anthony> 2001-02-10  Anthony Green  <green@redhat.com>
Anthony> 	* configure.host: Define with_libffi.
Anthony> 	* configure.in: Define USING_LIBFFI accordingly.
Anthony> 	* configure: Rebuilt.
Anthony> 	* include/config.h.in: Add USING_LIBFFI.
Anthony> 	* java/lang/reflect/natMethod.cc: Obey USING_LIBFFI.

I don't mind introducing USING_LIBFFI.  I think this is a good idea.

However, couldn't we somehow ask libffi whether it should be used?
That way we only need to do the configure hacking in a single place.
Ideally libffi could tell us (1) if it works on the platform and (2)
if the closure code is supported on the platform.

Tom