Implementation of F2018:18.4 C descriptors and ISO_Fortran_binding.h

[Dominique d'Humières]

> Thanks for the heads up on this failure in 32 bit mode.  Was there a
> just a failure in ISO_Fortran_binding_1.f90 or did
> ISO_Fortran_binding_1.c fail as well?

Only ISO_Fortran_binding_1.f90 at compile time. I don’t know what will happen after a fix.

Dominique

>> Then the test gfortran.dg/ISO_Fortran_binding_1.c failed for the 32 bit mode:
>> 
>> /opt/gcc/work/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_1.f90:142:8:
> 
> 
> Many thanks for giving this a whirl.
> 
> Paul