Hello all Thanks for the good work on emacs (which I am using since before 1990, the year I defended my PhD in Paris) I git cloned in /usr/src/Editors/emacs then './configure'  '--program-suffix=-trunk' 'CFLAGS=-O2 -g' and the build fails (repeatedly) > Loading /usr/src/Editors/emacs/lisp/emacs-lisp/syntax.el (source)... > Loading /usr/src/Editors/emacs/lisp/font-lock.el (source)... > Loading /usr/src/Editors/emacs/lisp/jit-lock.el (source)... > Loading /usr/src/Editors/emacs/lisp/mouse.el (source)... > Loading /usr/src/Editors/emacs/lisp/scroll-bar.el (source)... > Loading /usr/src/Editors/emacs/lisp/select.el (source)... > Loading /usr/src/Editors/emacs/lisp/emacs-lisp/timer.el (source)... > Loading /usr/src/Editors/emacs/lisp/emacs-lisp/easymenu.el (source)... > Loading /usr/src/Editors/emacs/lisp/isearch.el (source)... > Loading /usr/src/Editors/emacs/lisp/rfn-eshadow.el (source)... > Loading /usr/src/Editors/emacs/lisp/menu-bar.el (source)... > make[1]: *** [Makefile:858: bootstrap-emacs.pdmp] Segmentation fault (core dumped) > make[1]: Leaving directory '/usr/src/Editors/emacs/src' When gcc is version 11.2 from Ubuntu Hope this helps Cheers PS. My pet project is http://refpersys.org/ -- Basile Starynkevitch (only mine opinions / les opinions sont miennes uniquement) 92340 Bourg-la-Reine, France web page: starynkevitch.net/Basile/