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Re: [RFC] Symbol Separation - Debugging
On Wed, Jul 02, 2003 at 01:55:08PM -0400, Jason Merrill wrote:
> On Wed, 2 Jul 2003 12:21:49 -0400, Daniel Jacobowitz <drow@mvista.com> wrote:
>
> > On Wed, Jul 02, 2003 at 12:05:26PM -0400, Jason Merrill wrote:
>
> >> The -feliminate-dwarf2-dups code separates out debug info for a particular
> >> header into a separate compilation unit, and uses symbolic references to
> >> get at it. Duplicates are eliminated using .linkonce.
> >
> > Right; the difference between that code and this is that the references
> > are in the same object file, so we can use DW_FORM_ref.
>
> Hmm? With .linkonce processing the refs will only be in the same object
> file for one object file. And in any case, the references aren't in the
> same CU, so we need to use DW_FORM_ref_addr.
I don't think we're talking about the same thing. I was talking about
Devang's patch: you build the debug information for the header once,
and then that header doesn't go through dwarf2out when you compile a
file which includes the header. Saves time and object file size, not
just final binary size, which is what the .linkonce is for.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer