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Re: C++ demangler horrors
- From: "H. J. Lu" <hjl at lucon dot org>
- To: Alexandre Oliva <aoliva at redhat dot com>
- Cc: Gabriel Dos Reis <gdr at integrable-solutions dot net>,Gerald Pfeifer <pfeifer at dbai dot tuwien dot ac dot at>,Oscar Fuentes <ofv at wanadoo dot es>, gcc at gcc dot gnu dot org
- Date: Tue, 1 Jul 2003 07:24:07 -0700
- Subject: Re: C++ demangler horrors
- References: <20030626203555.GA25243@lucon.org> <email@example.com> <20030627014931.GA30139@lucon.org> <firstname.lastname@example.org> <Pine.BSF.email@example.com> <20030628013200.GA23878@lucon.org> <firstname.lastname@example.org> <20030628145900.GA2791@lucon.org> <20030628152805.GA3496@lucon.org> <email@example.com>
On Tue, Jul 01, 2003 at 10:47:11AM -0300, Alexandre Oliva wrote:
> On Jun 28, 2003, "H. J. Lu" <firstname.lastname@example.org> wrote:
> > On Sat, Jun 28, 2003 at 07:59:00AM -0700, H. J. Lu wrote:
> >> My patch doesn't requrie it. But some people don't like the way I solved
> >> the problem with
> >> ar -d ....
> >> ar rc ....
> It's not about not liking. Consider a parallel build in which someone
> is linking with libiberty while demangler goes and modifies it. Bad
> idea. And splitting this into demangler like this won't fix it:
> > all:
> > $(MAKE) -C ../libiberty [new_demangler|old_demangler]
I don't get it. Are you saying you can link with libiberty before
libiberty is done? In my post:
> 3. Change the top level dependency such that targets which used to depend on
> libiberty, now depend on demangler, demangler depends on libiberty and
> libstdc++ if it is needed. Please keep in mind that only demangler for target
> needs libstdc++ for target. I don't believe it has much impact on parallel
Can you tell me how a parallel build will fail with my proposal?