[PATCH] Fortran: add Fortran 2018 IEEE_{MIN,MAX} functions

[FX Coudert]

Hi,

> I cannot see if there is proper support for kind=17 in your patch;
> at least the libgfortran/ieee/ieee_arithmetic.F90 part does not
> seem to have any related code.

Can real(kind=17) ever be an IEEE mode? If so, something seriously wrong happened, because the IEEE modules have no kind=17 mention in them anywhere.

Actually, where is the kind=17 documented?

FX