https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120586
--- Comment #2 from Greg Chandler <chandleg at wizardsworks dot org> --- (In reply to Andrew Pinski from comment #1) > > --with-newlib > > You can't use that and then use glibc to build libstdc++. > > If you are building libstdc++ for the second stage, you should not have ` > --with-newlib --without-headers` Thank you!