[build] Move gthr to toplevel libgcc

[Rainer Orth]

Paolo Bonzini <bonzini@gnu.org> writes:

> On 08/08/2011 05:42 PM, John David Anglin wrote:
>>
>>
>>> ** _DCE_THREADS is used to select gthr-dce.h, but again dce is the
>>> only/default model on hppa[12]*-*-hpux10* (pa-hpux10.h), so the
>>> special-casing can be removed.
>>
>> DCE threads and thread single are both supported.  There are
>> multilibs for both.  Different libraries are needed for threaded and
>> non threaded programs, and there is no mechanism to detect whether
>> threads are active or not.
>
> Rainer used _REENTRANT for that, because it's already in the spec.  Is that
> ok?

I could find no indication that HP-UX 10 supported anything but DCE
threads (especially no POSIX threads), so _REENTRANT being defined must
meant DCE threads, unless I'm mistaken.

	Rainer

-- 
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Rainer Orth, Center for Biotechnology, Bielefeld University