[Bug c/20785] Pragma STDC * (C99 FP) unimplemented

[vincent-gcc at vinc17 dot net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=20785

--- Comment #17 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to Pavel M from comment #16)
> Note: The #pragma STDC FENV_ACCESS is unknown and ignored (leading to FP
> issues), however, the __STDC_IEC_559__ is defined to 1. Confused.

Yes, and IMHO, with __STDC_IEC_559__ defined to 1, this is a much more severe
issue. This PR should not be regarded as an enhancement, but as a real bug
(this would be an enhancement only if when __STDC_IEC_559__ is defined to 1,
there would be a lack of optimization).