versioning of _Unwind_*() symbols

[David Mosberger]

>>>>> On Thu, 22 Apr 2004 15:02:15 -0700, "H. J. Lu" <hjl@lucon.org> said:

  HJ> BTW, since the ABI library is more than just unwind library. We
  HJ> can't use David's unwind library as is.

You can.  Just list -lunwind as a dependency as is done now with libgcc_s.

  HJ> Also his unwind library is a link-time replacement, not run-time
  HJ> replacement for existing unwind library in icc.

That's not true any longer: with the libunwind in the bk repository
(due to be released as v0.97 any day now), my libunwind can serve as a
direct replacement for Intel's libunwind.  The only left-over wrinkle
at the moment is that Intel's major version is 6 whereas mine has
version 1.  I'm not sure what to do about that.  Perhaps we should all
just use 6 since the actual version doesn't matter?

	--david