versioning of _Unwind_*() symbols

[David Mosberger]

>>>>> On Tue, 20 Apr 2004 15:40:25 -0700, Jim Wilson <wilson@specifixinc.com> said:

  Jim> So it seems that libgcc wasn't doing anything wrong, rather our
  Jim> attempt to remove functions from libgcc to save space was
  Jim> wrong.  We can remove them from libgcc.a, but not from
  Jim> libgcc_s.so.

When built against libunwind, libgcc_s.so should have a dependency
on libunwind.so and hence no symbols got lost.

However, there is still a versioning issue.  AFAIK, the C++ ABI
doesn't specify (allow?) versioned symbols.  Certainly Intel's
_Unwind_*() routines also are not versioned.

	--david