Your bug report #63556: 29.0.90; Use of _Generic breaks Emacs build on GCC <4.9 which was filed against the emacs package, has been closed. The explanation is attached below, along with your original report. If you require more details, please reply to 63556@debbugs.gnu.org. -- 63556: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=63556 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems