[Bug libstdc++/78565] undefined reference to `aligned_alloc' when building mingw-w64 cross-compiler

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78565

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
i.e. I think this is a dup of PR libstdc++/79190