I'm getting the following:

===> ksh
sh /usr/src/bin/ksh/emacs-gen.sh /usr/src/bin/ksh/emacs.c > tmpemacs.out
awk: cmd. line:17: (FILENAME=- FNR=1) fatal: internal error line 170, file: /usr/src/gnu/usr.bin/gawk/eval.c
*** Error code 1

Stop.
*** Error code 1

I've built and installed gawk, but with no effect.  At this stage, sleep
is more important than line 170 of eval.c (which looked like it will
give me nightmares after a _quick_ glance), but I'll look further in the
morning if noone else suggests anything...

Simon.