Re: [PATCH] Preliminary DW_OP_{implicit,stack}_value support (take 2)

[Richard Henderson <rth at redhat dot com>]

Cary Coutant wrote:
> > > And of course we can't have this going out in gcc 4.5 until the
> > > dwarf4 spec is released.  Is there an eta on dwarf4?  If not,
> > > perhaps this code should simply stay on a branch somewhere...
> > I'd say we have a precedent of using DWARF3 draft features years before
> > DWARF3 has been released (say DW_CFA_def_cfa_expression), but if you want to
> > be cautious this time...
> > Cary, can you find out if there is an approx. eta on DWAF4?  This year, in
> > 2 years, within next decade?
> > If it would take too long, perhaps using DW_OP_GNU_stack_value (0xf2?)
> > would be the way to go.
>
> We've closed the door for new issues, but are still working on
> extensions to support C++0x. I think the goal is to have it done
> before the end of the year, but we haven't discussed the timeline for
> a while now.
>
> I think that, aside from the new C++0x features, everything else
> that's new in DWARF 4 is stable enough to start using in gcc.

Fair enough.  I won't hold up the patch from mainline based
on the non-release of dwarf4 based on the understanding that
these two particular codes are finalized.


r~