Re: [PATCH] DW_AT_calling_convention support

[Jim Blandy <jimb@redhat.com>]

Petr Sorfa <petrs@caldera.com> writes:
> > Okay, I'll look forward to the patch.
> In a few minutes.
> 
> > Is checking the calling convention really the approved technique for
> > recognizing a Fortran entry point in Dwarf 2?  Is it really the case
> > that Fortran programs always only have one function with this calling
> > convention?  Would your patch do something sensible if it found more
> > than one?
> Good question, the Dwarf standard V3 Draft 7 Page 44 says:
> 
> "The DW_CC_program value is intended to support Fortran main programs.
> It is not intended as
> a way of finding the entry address for the program."
> 
> So the answer is yes and no. But I think the patch is valid as it
> determines not the entry point, but the main program. As far as I am
> aware you can have only one PROGRAM entry per FORTRAN program. If there
> is more than one found, the patch just uses the last read entry. I don't
> think supporting a more intricate way would be much use (such as keeping
> a list of DW_CC_program entries.)

What's the difference between the entry point and the main program?