Re: fix for the multiple-decl problem - please test

[Mikael Morin <mikael dot morin at tele2 dot fr>]

Paul Richard Thomas wrote:
> Daniel,
> 
> I have had a quick look at your patch; it seems to be doing a lot of
> the right things with the function declarations but I wonder if it is
> overall the simplest and cleanest way of skinning this particular cat?
> 
> As you might be aware, I started on a revamp of the parsing,
> resolution and translation that put all the symbols for all procedures
> and the main program into a global namespace.  In this way, parsing
> and translation could be done on a "whole file" basis.  The multiple
> declaration problem could be solved by translating the function or
> procedure as soon as any reference to it is encountered and the
> backend_decl can be found subsequently attached to the symbol in the
> global namespace.  Similarly, interfaces can be resolved using the
> existing mechanics in interface.c and derived types are taken care of
> naturally, as if in a single program unit; ie. they have the lifetime
> of the global namespace.
> 
> Now you might well ask why I did not develop this further? Partially
> because of the question that I raised in
> http://gcc.gnu.org/ml/fortran/2007-07/msg00151.html - I now understand
> this to be baseless but it stopped me at the time.  Secondly, such
> time as I have had subsequently for gfortran has been taken more or
> less entirely taken by firefighting:-(  I would early have liked to
> have developed it further.
> 
> Anyway, I am raising this question because your approach looks as if
> it is entirely focussed on the multiple decl problem and that you will
> attack the other issues separately, largely because you associate
> external decls in the backend tree.  Maybe you have some plan in mind
> that I have not figured out? :-)
> 
> Cheers
> 
> Paul
> 
> PS will answer separately to your question about the derived type checking...
> 
I agree with Paul that whole file parsing, together with a file
namespace is
the proper way to fix the multiple-decl problem.
I was planing to have more than a look at it, but I'm "firefighting" at
the moment

Cheers

Mikael