bug#23175: CC Mode 5.33 (C++/l); `c-mode-base-map' has no parent keymap

[Elliot Glaysher]

While all the modes defined in cc-mode.el derive from `prog-mode', their
keymaps do not derive from `prog-mode-map'. Their definitions do not
trigger the call to `set-keymap-parent' that `define-derived-mode'
usually does automatically.

This can be fixed by adding a call to set-keymap-parent right after
c-mode-base-map gets set to a sparse map, but a more complicated fix
is probably needed if you care about xemacs compatibility (and
`c-make-inherited-keymap' implies that you do).

See http://debbugs.gnu.org/cgi/bugreport.cgi?bug=14504 for another case
where this happened in `emacs-lisp-mode'.

Emacs  : GNU Emacs 25.1.50.2 (x86_64-pc-linux-gnu, GTK+ Version 3.16.7)
 of 2016-03-24
Package: CC Mode 5.33 (C++/l)
Buffer Style: google
c-emacs-features: (pps-extended-state col-0-paren posix-char-classes
gen-string-delim gen-comment-delim syntax-properties 1-bit)


-- 
-- Elliot