[Bug libstdc++/101867] avr libc build error for libstdc++

[unlvsur at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101867

--- Comment #6 from cqwrteur <unlvsur at live dot com> ---
Created attachment 51295
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51295&action=edit
errors with --with-avr

i just find --with-avr toggle in the libstdc++'s configure. but it has other
issues here.