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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/109378] improve __builtin_sqrt
Date: Sun, 02 Apr 2023 21:27:03 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109378

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |*-linux-gnu

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to g.peterhoff from comment #2)
> But this is of no use if I want to compile something "normally" without
> compiler specific options.

Note some libc implementations don't implement setting errno on math functi=
ons
(e.g. Darwin) and for those targets,  -fno-math-errno is already the defaul=
t.

So if you don't need to check errno, then you can use  -fno-math-errno. C/C=
++
allows for an implementation to set errno on an error for math functions ev=
en.
So this is more about you wanting something different from what the
implementation does ...=