[Bug libstdc++/96657] [9/10/11 Regression] libsupc++.a missing required functions from src/c++98/atomicity.cc when atomic builtins are not supported

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96657

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2020-08-17
            Summary|libsupc++.a missing         |[9/10/11 Regression]
                   |required functions from     |libsupc++.a missing
                   |src/c++98/atomicity.cc when |required functions from
                   |atomic builtins are not     |src/c++98/atomicity.cc when
                   |supported                   |atomic builtins are not
                   |                            |supported

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think r244051 caused libsupc++.a to depend on libstdc++.so for targets that
don't support lock-free atomics for int.