new syscall stub support for ia64 libc

[Ulrich Drepper]

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David Mosberger wrote:

> Related question: it seems to me tst-cancel6 cannot possibly succeed
> with NPTL _unless_ HAVE_FORCED_UNWIND is true?

That might be.  It's no supported configuration anyway.  I think it's
time to make configure fail in all these non-standard environments.  It
was mainly useful when developing.  But now all the tools are there.

- -- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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