https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59472
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to Paul Scruby from comment #5) > Is there a patch to fix or suppress the warnings when link-time optimizing > to libstdc++.a ? I'm using gcc4.8.2, but I'm happy to upgrade to gcc4.9 if > this release is more likely to get fixed first? Well both those branches are closed now; could you upgrade to something more recent instead?