Date: Wed, 30 Oct 2002 23:40:20 +0000 (GMT) From: Doug Rabson <dfr@nlsystems.com> To: Terry Lambert <tlambert2@mindspring.com> Cc: Daniel Eischen <eischen@pcnet1.pcnet.com>, <current@freebsd.org> Subject: Re: [PATCH: libc]Re: gnome on current Message-ID: <20021030233833.C22480-100000@herring.nlsystems.com> In-Reply-To: <3DC068EE.D04E207C@mindspring.com>
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On Wed, 30 Oct 2002, Terry Lambert wrote: > Doug Rabson wrote: > > > You need to link the library against libc_r.so instead of libXThrStub.so. > > > > Probably not. Doing that breaks the existing 'feature' of being able to > > use X11 in entirely non-threaded programs. I'm not sure whether that is > > acceptable. It also stops programs from being able to select between > > several thread implementations, of which -current has two. > > > > I think the only sensible solution to this problem is for libraries which > > provide an actual pthreads implementation (rather than a set of stubs) to > > define strong symbols. Wierd debugging wrappers can still be achieved via > > some dlopen/dlsym hackery. > > OK... I guess I don't understand the problem. > > If you are not compiling threaded programs for use with X, and > X itself is not threaded, then why the heck was the threads stuff > there in the first place? > > If X itself uses threads, then you need to use threads: there's > no option in the matter. > > If libX11.so does not reference, the threads symbols, who cares? > > If libX11.so *does* reference the threads symbols, then they need > to be there. > > You can't have a library that's sort of threaded and sort of not > threaded: pick one. Yes you can - libX11 is *thread safe* but doesn't create threads. When a real pthreads implementation is present, libX11 uses its implementation of mutex, cond etc. to ensure its own safety. If the application doesn't link to a real pthreads implementation, it uses no-op stubs instead. -- Doug Rabson Mail: dfr@nlsystems.com Phone: +44 20 8348 6160 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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