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

[redi at gcc dot gnu.org via Gcc-bugs]

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

--- Comment #17 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to cqwrteur from comment #2)
> ../gcc/configure --disable-nls --disable-werror --disable-libstdcxx-verbose
> --enable-libstdc++ --disable-ssp --enable-languages=c,c++ --prefix=$PREFIX
> --target=avr --disable-shared --with-newlib

N.B. it should be --enable-libstdcxx not --enable-libstdc++ because of how
autoconf handles + symbols.