https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62306
--- Comment #11 from Jason Merrill <jason at gcc dot gnu.org> --- I'm not too concerned about the change.(In reply to Jakub Jelinek from comment #9) > 4.5+4.6+4.9 is more released compilers than 4.7/4.8 though, and 4.9 is > already widely deployed too, IMHO it is worse to change this again > mid-release. Fair enough. I'm not too concerned about the mismatch either way; even in 4.7/4.8 any TU that emits D1/2 also emits D0, so we aren't going to have link failures.