[Bug libstdc++/79348] [7 Regression] abi_check fails on s390x (2 undesignated symbols)

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79348

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't think that commit is related. Those symbols where added by r232454 and
are defined when this condition is true:

+#if __cplusplus >= 201103L && _GLIBCXX_USE_CXX11_ABI                   \
+  && _GLIBCXX_USE_DUAL_ABI && __cpp_transactional_memory >= 201505L    \
+  &&  !_GLIBCXX_FULLY_DYNAMIC_STRING && __GXX_WEAK__                   \
+  && _GLIBCXX_USE_ALLOCATOR_NEW