[PATCH] Fortran: Add IEEE_SIGNBIT and IEEE_FMA functions

[Mikael Morin]

Le 10/09/2022 à 12:14, FX via Fortran a écrit :
> If you have a solution for the standards checking, I’ll add it.
> 
As a first step, one could check the use rename lists; what's done for 
iso_fortran_env can be used as an example.

To diagnose the other usages, the check could be put in resolve_symbol 
but it would diagnose it even if not used, so one can add a check on 
attr.referenced (I hope it can be relied upon).
Another possibility is mimicking or modifying gfc_resolve_intrinsic, 
which already does a similar job for intrinsic procedures.

I hope this helps.