https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71767
--- Comment #35 from Jack Howarth <howarth.at.gcc at gmail dot com> --- (In reply to Eric Gallager from comment #33) > I'm not sure if this is due to the patches from this bug report, or if it's > due to some other change made to GCC recently, but my fork of Emacs now > fails to build with LTO due to a bunch of undefined local symbols: Did you actually add the patches for this bug report to your local gcc build? The patches haven't been posted to gcc-patches yet or committed into trunk.