[Bug libstdc++/97729] [11 Regression] Link failure due to basic_stringbuf and others when building DLL on MinGW

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97729

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Great, thanks for the report and testing the fix.