Date: Tue, 4 Feb 1997 18:30:21 -0500 (EST) From: Chuck Robey <chuckr@glue.umd.edu> To: Terry Lambert <terry@lambert.org> Cc: Josh MacDonald <jmacd@CS.Berkeley.EDU>, hackers@FreeBSD.ORG Subject: Re: g++, STL and -frepo on FreeBSD-2.2-Beta Message-ID: <Pine.OSF.3.95q.970204182559.1349A-100000@baud.eng.umd.edu> In-Reply-To: <199702042301.QAA13316@phaeton.artisoft.com>
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On Tue, 4 Feb 1997, Terry Lambert wrote:
> > > Clearly, the template class definition
> > >
> > > template <class Type>
> > > class list ... {
> > > ...
> > > };
> > >
> > > is not in scope. The header files you have included are apparently
> > > not sufficient.
> > >
> > > Perhaps you meant "List" instead of "list"???
> >
> > Clearly, you have no idea what you're talking about. You should be a
> > bit more careful with your use of "clearly", it makes me wonder how
> > much of the rest of your mail to this list (which I rarely understand)
> > is correct.
>
> If the linker can not resolve the symbol, the symbol:
>
> A) Is not in scope
> B) Is not there, period
> C) Was not created in scope because you want the linker to
> "magically" share template implementation between class
> specific template instantiations.
I'm not sure this is apropos, but maybe... while I was porting
octave-2.0.1, I had a lot of trouble with template functions that were
compiled -fno-external-templates. Seems like the virtual tables were
being created as local symbols only, so no other functions compiled in
other files could see the tables. I ended up having to remove the
-fno-external-templates from every file that used the tables, so they'd
instantiate their own virtual tables. Made the code size larger, but I
couldn't find a way to fix it. Neither could JW Eaton, Octave's author,
who worked with me for a while.
The problem has been papered over, but not fixed. Is this possibly
something like you're discussing above?
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