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Date:      Thu, 31 Oct 2002 08:58:53 +0000 (GMT)
From:      Doug Rabson <dfr@nlsystems.com>
To:        Juli Mallett <jmallett@freebsd.org>
Cc:        Terry Lambert <tlambert2@mindspring.com>, Daniel Eischen <eischen@pcnet1.pcnet.com>, <current@freebsd.org>
Subject:   Re: [PATCH: libc]Re: gnome on current
Message-ID:  <20021031085741.W22480-100000@herring.nlsystems.com>
In-Reply-To: <20021030180238.A7388@FreeBSD.org>

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On Wed, 30 Oct 2002, Juli Mallett wrote:

> * De: Terry Lambert <tlambert2@mindspring.com> [ Data: 2002-10-30 ]
> 	[ Subjecte: Re: [PATCH: libc]Re: gnome on current ]
> > > > Maybe the workaround for now is to make the symbols in libXThrStub.so
> > > > weak?
> > >
> > > They *are* weak Terry. The problem is that every bloody definition is weak
> > > so the linker has no way of picking the one definition which will actually
> > > work. The real problem is that the actual working threads library doesn't
> > > provide strong symbols to allow it to override all the other stubs.
> >
> > First strong/last weak should win.  You are saying "last weak" is not
> > winning.  That's a linker bug.
>
> Considering that I built the same applications and ran the same applications
> fine a while ago, and we've had a binutils upgrade, and things don't break
> on other systems, I'm inclined to assume there are linker bugs afoot, and
> all the other speculative stuff seems to be based on misunderstandings or
> bad information.

I'm not misunderstanding things. I single stepped through the call to
pthread_setspecific(), watched the linker lookup the symbol and followed
it through into the wrong place (i.e. the stub instead of the real
implementation).

-- 
Doug Rabson				Mail:  dfr@nlsystems.com
					Phone: +44 20 8348 6160



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