https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94835
--- Comment #3 from Stephen Casner <casner at acm dot org> --- I'm working with unmodified gcc sources, but if no other targets are seeing this problem then it may be caused by pdp11-specific code somewhere else. I guess that g++ and libstdc++v3 have never been successfully built for pdp11. Any suggestions for debugging this? Perhaps backing off on some compiler feature that might be tickling the bug?