https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97570
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Matwey V. Kornilov from comment #0) > Then gcc and libstdc++ are compiled and installed successfully without any > further errors. P.S. this is great news. I've been meaning to check this myself for some time, as I'd like libstdc++ to be usable (where appropriate) for Arduino projects.