https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68744
--- Comment #7 from John David Anglin <danglin at gcc dot gnu.org> --- Created attachment 37012 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37012&action=edit Patch I don't expect this to work but it points at the problem. The call to backtrace_create_state() assumes threaded code. backtrace_create_state() returns NULL if HAVE_SYNC_FUNCTIONS is not defined.
