menu-bar-update-hook run very often

[David Kastrup]

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

Try (add-hook 'menu-bar-update-hook 'debug)

The documentation string claims

    Normal hook run for clicks on menu bar, before displaying a submenu.
    Can be used to update submenus whose contents should vary.

But the hook is run much much much more often, such as when one
switches buffers.  It certainly does not depend on a menu being
clicked.

I would _want_ a hook that does what the document string claims this
hook does.  I am not sure, however, about existing uses.


In GNU Emacs 21.3.50.4 (i686-pc-linux-gnu, GTK+ Version 2.2.1)
 of 2003-10-13 on lola.goethe.zz
configured using `configure '--prefix=/usr/local/emacs-21' '--with-gtk''

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: en_US
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Major mode: LaTeX

Minor modes in effect:
  reftex-mode: t
  auto-compression-mode: t
  desktop-save-mode: t
  display-time-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  unify-8859-on-encoding-mode: t
  line-number-mode: t

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum