[PATCH] Remove unused libgfortran functions

[FX]

> Yes, I agree (in general, though I was thinking of making the new one
> "GFORTRAN_7" to match the release series).

Given that there will not be a 1-to-1 mapping of release series with major ABI versions (hopefully!), I don’t think this is a good idea. It will make people confused.


> There's also other things,
> like e.g. ISO_C_BINDING helper functions living under the
> __iso_c_binding namespace, instead of under _gfortran like everything
> else.

Agreed.

> And while we're at it, should we place everything under
> "__gfortran" or "_GFortran", that is, with two underscores or one
> underscore followed by a capital letter which in the C world is
> reserved for the implementation? Though it's not clear to me whether
> libgfortran can claim to be part of "the implementation" vs. being
> generic user code.

Another issue is that we have some documented, user-callable functions that currently live in the __gfortran_ “namespace”, e.g. the mixed-language routines (https://gcc.gnu.org/onlinedocs/gfortran/Non-Fortran-Main-Program.html). We want to avoid changing those for no reason, and so for consistency I think we should keep everything under __gfortran_ 


FX