https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108734
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=81358 --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- These builtins are always available (via libatomic if neded) so testing __has_builtin does not make sense. If you are asking why libatomic is not automatically linked then this is a dup of bug 81358.