https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101867
--- Comment #14 from cqwrteur <unlvsur at live dot com> --- (In reply to Jonathan Wakely from comment #13) > Marking as enhancement, since this is not a supported target for libstdc++ > today, so is not expected to build. Whatever. i have successfully built that. It works very well tbh. Thank you! We need to resign none standard implementation of libstdc++ forks tbh. https://github.com/modm-io/avr-libstdcpp/tree/master/include