Re: Error when editing C code

[Alan Mackenzie]

Hello, Raman.

On Wed, Jun 15, 2022 at 12:59:39 -0700, T.V Raman wrote:
> Appears to be due to incorrect loading of macros in cc-mode.

> If I try editing a c/c++ file, I get this backtrace.

> This emacs from Git @HEAD, I even did a make distclean followed by a
> rebuild  but the error persists.

> Debugger entered--Lisp error: (void-function c-with-string-fences)
>   (c-with-string-fences nil nil nil nil t nil nil t (c-depropertize-new-text 
> c-after-change-escape-NL-in-string c-after-change-unmark-ml-strings 
> c-parse-quotes-after-change c-after-change-mark-abnormal-strings 
> c-extend-font-lock-region-for-macros c-neutralize-syntax-in-CPP 
> c-restore-<>-properties c-change-expand-fl-region))
>   (c-after-change 2617 2617 6)
>   (delete-and-extract-region 2617 2623)

[ .... ]

Noting that make bootstrap has fixed the problem, I am unhappy that the
problem occurred in the first place.  c-with-string-fences is a new
macro in cc-defs.el (in lisp/progmodes/).  c-after-change is a function
in cc-mode.el.

There is a section in lisp/Makefile specifically for dependencies in
cc-*.el, and this should have picked up the change in cc-defs.elc and
rebuild (amongs others) cc-mode.elc.  That section looks like:

#########################################################################
$(lisp)/progmodes/cc-align.elc\
 $(lisp)/progmodes/cc-cmds.elc $(lisp)/progmodes/cc-compat.elc\
 $(lisp)/progmodes/cc-engine.elc $(lisp)/progmodes/cc-fonts.elc\
 $(lisp)/progmodes/cc-langs.elc $(lisp)/progmodes/cc-menus.elc\
 $(lisp)/progmodes/cc-mode.elc $(lisp)/progmodes/cc-styles.elc\  <======
 $(lisp)/progmodes/cc-vars.elc: \
   $(lisp)/progmodes/cc-bytecomp.elc $(lisp)/progmodes/cc-defs.elc
#########################################################################

So, why was cc-mode.elc not rebuilt with the new cc-defs.elc?

> -- 

> Thanks,

> --Raman(I Search, I Find, I Misplace, I Research)
> ♈ Id: kg:/m/0285kf1  🦮

-- 
Alan Mackenzie (Nuremberg, Germany).