[Bug 294719] lib/msun: Added fmaximum_mag_num

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D294719

--- Comment #5 from Jes=C3=BAs Cipriano Bl=C3=A1zquez Mart=C3=ADnez <jesusc=
[email protected]> ---
(In reply to Robert Clausecker from comment #4)

My bad. Not having (void) doesn't raise warnings because reading a volatile
variable does have side effects, I thought that's what you meant.=20

Testing around, as you suspected, deleting the entire line doesn't raise
warnings with regular make either (unless it is compiled with
-Wunused-variable). It also keeps raising exceptions as expected when delet=
ing
the line, meaning the compiler won't ignore the line.=20

I can update the patch if it makes your life easier

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