[Bug fortran/84615] [8 Regression] Executable Segfault for some tests compiled with -m32 after r256284

["jb at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84615

--- Comment #14 from Janne Blomqvist <jb at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #13)
> (In reply to Janne Blomqvist from comment #12)
> > So to be clear, the problem seems to be that while the code generation for
> > the function itself appears Ok, it generates the interface wrong (i.e. uses
> > the declared charlen kind instead of C_SIZE_T), and thus calling it doesn't
> > work properly.
> 
> I'm confused. Should not the charlen kind be identical to C_SIZE_T, also
> for -m32?

Yes, it should. But if you look e.g. at #c8 and #c9 you'll see that in the
interface the compiler thinks it should be kind=8 (on 32-bit i686), most likely
because the charlen is declared as kind=8. Which isn't C_SIZE_T which is 4 on
32-bit targets.

So what I'm trying to say is that we should always treat charlens as
kind=C_SIZE_T (gfc_charlen_type_node) in interfaces regardless of how they are
actually declared in the Fortran source code.