https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97831
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- In the case of glibc, the callee needs to be marked as not a tail callable and not the caller.
pinskia at gcc dot gnu.org via Gcc-bugs Wed, 01 Sep 2021 22:38:26 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97831
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- In the case of glibc, the callee needs to be marked as not a tail callable and not the caller.