[Bug libstdc++/79862] Compilation error while building libstdc++

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79862

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
         --disable-hosted-libstdcxx \

That is more likely the cause.  non-hosted libstdc++ is not well tested.