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

[vogt at linux dot vnet.ibm.com]

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

--- Comment #4 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
(Also happend without --enable-shared.)