[Bug middle-end/64101] GCC considers that the erf math function does not set errno

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64101

--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
possibly related to some of the other -fmath-errno bugs that have been under
discussion lately?