new syscall stub support for ia64 libc

[David Mosberger]

>>>>> On Mon, 8 Dec 2003 21:38:45 +0100, Jakub Jelinek <jakub@redhat.com> said:

  Jakub> Why a separate shared library and not libgcc_s.so?

libunwind is the standard library in the ia64 world for implementing
the _Unwind_*() interface.  Intel ships libunwind.so with their
compiler, HP-UX does too, etc.

  Jakub> The code certainly needs to be in libgcc_eh.a too for
  Jakub> statically linked apps.

I don't think so.  Just link in libunwind.a when necessary.  GCC
already has code to handle this.

	--david