[Patch, Fortran] Derived-type finalization, second part split off

[Daniel Kraft]

Hi Paul,

here's a second split-off from the finalization patch after check-in and 
remerging the last part; it is roughly everything (remainin after the 
last part) except resolve.c changes.

This is somehow the "main part" and includes the logic behind 
gfc_finalize_expr, that is, everything except for the integration and 
actual *calling* of finalization.  This means that this patch for itself 
does neither introduce new features nor any risk of breaking something 
(I think).

Maybe we could also include the basic finalization when a symbol goes 
out of scope here to get the code actually tested already when this is 
checked-in and somewhat working (but for this we would have to remove 
the not-yet-implemented message though finalization would be implemented 
at best "partially" then).  What do you think?  From my point of view, 
both ways are equally good solutions.

I believe this part of the patch is already quite "stable" and finished, 
nothing of the "open issues" affects it; the only point I ask you to 
think about is that by checking in this one, we make our lives harder if 
we find out that finalization can't possibly be done in the front-end 
and we have to move it to trans; but I believe it is highly unlikely 
that this should happen, and hope we can resolve the last issues in a 
way as I proposed in http://gcc.gnu.org/ml/fortran/2008-08/msg00026.html.

As usual, some XXX comments left in...  What do you think about this 
patch, ok to commit or should I add some parts of reslve.c as described 
above?  If I know your decision on how we should handle this part, I'll 
of course add a ChangeLog entry.

Regression-tested on x86-32-GNU/Linux with no failures of course, but as 
I said above I can't imagine how this patch should break something at 
the moment.

Cheers,
Daniel

PS:  From today evening, I'll be off until coming Friday, possibly late 
at night; I'm doing a mountain-trip near the Großglockner (well, what do 
Austrians do in the summer when there's no snow to ski?).  So take your 
time :)

-- 
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