[patch, ia64, libgcc] Patch to fix libunwind build on IA64

[Rainer Orth]

Steve Ellcey <sje@cup.hp.com> writes:

> This patch fixes the IA64 bootstrap when building libunwind.  When using
> -fexceptions libunwind will have a reference to __gcc_personality_v0 and
> the bootstrap fails, using -fno-exceptions fixes this.  This problem
> started with r181172, Michael Matz's fix to mark objects death at end of
> scope.
>
> Tested on IA64 HP-UX and Linux.
>
> While this change isn't in an ia64 specific file, ia64 is the only
> platform affected because no other platform defines LIBUNWIND in order
> to build a separate unwind library.  So I will go ahead and check it in
> if there are no objections.

I think there should be a comment explaining this to avoid involuntarily
breaking this in the future ;-)

Thanks.
        Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University