Oscar> I can't build XEmacs 21.1 on RedHat 6.0 at any level of optimization even when Oscar> using all the compiler flags mentioned in PROBLEMS (-fno-schedule-insns Oscar> -fno-strength-reduce -fno-caller-saves). Compilation stops with a temacs core Oscar> dump (see below). The whole thing builds when optimization is disabled. Any Oscar> help greatly appreciated. I updated the sources from CVS a few hours ago. Oscar> [...] Oscar> EMACSBOOTSTRAPLOADPATH="/home/xemacs/src/xemacs-21.1/src/../lisp/:/home/xemacs/src/xemacs-21.1" ./temacs -batch -l /home/xemacs/src/xemacs-21.1/src/../lisp/update-elc.el Oscar> make[1]: *** [update-elc.stamp] Segmentation fault (core dumped) Oscar> make[1]: Leaving directory `/home/xemacs/src/xemacs-21.1/src' Oscar> make: *** [src] Error 2 Oscar> Compilation exited abnormally with code 2 at Wed Jul 7 10:14:22 Here's a followup from Gunnar that might be of interest for the rest of the list, unfortunately this seems to be reproducible. Oscar