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Date: Fri, 22 Apr 2005 17:26:36 -0400 (EDT)
From: Daniel Eischen <deischen@freebsd.org>
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To: Peter Wemm <peter@wemm.org>
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cc: peter@freebsd.org
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Subject: Re: libpthread version bump
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On Fri, 22 Apr 2005, Daniel Eischen wrote:

> On Fri, 22 Apr 2005, Peter Wemm wrote:
>
> >
> > #2 can also make it a little easier to run 5.x i386 binaries on amd64 -
> > we could kill of most of those nasty ifdefs.
> >
> > #1 would end up something like:
> >   #pragma weak i386_set_gsbase
> >   #pragma weak i386_get_gsbase
> >   static void (*have_get_gsbase)(void) = i386_get_gsbase;
> >   static void (*have_set_gsbase)(void *) = i386_set_gsbase;
> >   if (have_i386_get_gsbase == NULL || have_get_gsbase() == -1) {
> >     use_ldt();
> >   } else {
> >     use_gsbase();
> >   }
> > I think that is sufficient to test if the symbols are present and test
> > if they work at runtime...
>
> I worked up a quick patch.  It compiles, but it will be some time
> before I can try it.
>
>   http://people.freebsd.org/~deischen/kse/libpthread.diffs

Note that I also slightly prefer #2, since you would have to make
the #pragma weak hacks to both libpthread and libthr.

-- 
DE