The xcb_atom_get functions were removed from xcb-util. Changed these to xcb_intern_atom/xcb_intern_atom_reply. Also, STRING is now XCB_ATOM_STRING. Reproducible: Always This patch should be much like the pulseaudio-0.9.22-xcb-atom.patch
My bad, it was actually libgksu and all I needed to do was emerge --with-bdeps --oneshot startup-notification Then I was able to emerge --with-bdeps @preserved-rebuild and all was good. Sorry.