[fortran,patch] Higher-level access to floating-point builtins

[FX]

> +      /* For now, we assume that if real(kind=10) exists, it is long double.
> +	 Later, we will deal with __float128 and break this assumption.  */
> 
> I think that should be kind=16.

Yes, in that comment, it should be.  Fixed, changed.

> Looks fine to me - and it is certainly better not to assume the
> real(kind=4/8/(10,16)) = C's float/double/long double correspondence.

Well, we still assume it in many places... just, in trans-intrinsic.c, it's now a lot more localized :)

Thanks for the review,
FX