Inconsistent use of __GTHREAD_HAS_COND

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Inconsistent use of __GTHREAD_HAS_COND
\ fafa (7 Oct 2007)
. \ Jason Merrill (10 Oct 2007)
. . \ fafa (10 Oct 2007)
. \ Benjamin Kosnik (10 Oct 2007)

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Subject:	Inconsistent use of __GTHREAD_HAS_COND
Group:	Gcc
From:	fafa
Date:	7 Oct 2007

Hi.

I tried to build gcc from the latest snapshot (gcc-4.3-20071005),
but I undefined the symbol "__GTHREAD_HAS_COND"
which is desribed in libstdc++-v3\ChangeLog as follows:
...
[!__GTHREAD_HAS_COND] Fall back to the old code, which deadlocks.
...

But libstdc++-v3\libsupc++\guard.cc uses the class __guard from
libstdc++-v3\include\ext\concurrence.h which depends on the symbol
__GTHREAD_HAS_COND and is undefined now.

It seems to me that the two files are not consistent.
What should I do ?

Cheers
Maett