https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71049
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- Actually, the errors involving CTORDTOR suggest this is a problem with the TM library support. I think that's meant to be disabled completely with --disable-libstdcxx-dual-abi, but seems to be causing a bootstrap failure instead.
