https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80042
--- Comment #3 from Craig Topper <craig.topper at gmail dot com> --- No -fmath-errno has no effect. It does have effect on other functions such as cosh or acos.
craig.topper at gmail dot com Wed, 15 Mar 2017 19:50:00 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80042
--- Comment #3 from Craig Topper <craig.topper at gmail dot com> --- No -fmath-errno has no effect. It does have effect on other functions such as cosh or acos.