[Bug libstdc++/87618] [9 Regression] Missing symbol for std::__cxx11::basic_stringbuf, std::allocator >::basic_stringbuf()

[daniel at constexpr dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87618

--- Comment #4 from Daniel Scharrer <daniel at constexpr dot org> ---
Thanks, everything works for me now.