[Bug libstdc++/90361] [9/10 Regression] Undefined symbols in libstdc++ when building with --with-default-libstdcxx-abi=gcc4-compatible

[ostash at ostash dot kiev.ua]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90361

--- Comment #11 from Viktor Ostashevskyi <ostash at ostash dot kiev.ua> ---
Cool! Thanks a lot, sad that this doesn't make to 9.2.