[PATCH] libgfortran: Correct FP feature macro checks

[Maciej W. Rozycki]

On Thu, 26 Nov 2020, Thomas Koenig wrote:

> If you want to look at something quite close to the standard, you can
> check out https://j3-fortran.org/doc/year/18/18-007r1.pdf  .

 Thanks!

  Maciej