[Bug c/55584] __sync_fetch_and_* friends do not issue warnings when CPU does not support them natively

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55584

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is not needed any more as there is a libatomic which can be used to
implement all the non-implemented ones in the compiler.

If you don't link with libatomic you will get linker failures which should be
enough now.