Symbol's function definition is void: executable-command-find-unix-p

[Andrew M. Scott~]

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

% emacs -q &
M-x grep errors with
grep-compute-defaults: Symbol's function definition is void: 
executable-command-find-unix-p

According to the lisp/Changelog, it looks like executable-command-find-unix-p 
got replaced
with executable-command-find-posix-p recently.

In GNU Emacs 21.3.50.2 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2004-02-02 on chlx212
configured using `configure '--prefix=/stor/garray/linux' 
'--with-x-toolkit=yes' '--x-includes=/usr/X11R6' '--x-libraries=/usr/X11R6/lib' 
'CC=gcc''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  unify-8859-on-encoding-mode: t
  line-number-mode: t

Recent input:
<help-echo> <escape> x g r e p <return> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<menu-bar> <help-menu> <report-emacs-bug>

Recent messages:
Loading mwheel...done
(/stor/garray/src/savannah/build/src/emacs -q)
Loading tool-bar...done
Loading image...done
Loading tooltip...done
Loading grep...done
grep-compute-defaults: Symbol's function definition is void: 
executable-command-find-unix-p
Loading emacsbug...done