with-suppressed-warnings ineffective?

[Stefan Monnier]

Hi Lars,

Another brilliant Stefan pointed out that we have undesired warnings:

  ELC      cedet/semantic/bovine/c.elc
‘define-child-mode’ is an obsolete macro (as of 27.1); use 
‘define-derived-mode’ instead.
  ELC      cedet/semantic/bovine/el.elc
‘define-child-mode’ is an obsolete macro (as of 27.1); use 
‘define-derived-mode’ instead.

[ Not sure if the file names are right above.  ]

AFAICT these come from

    (with-suppressed-warnings ((obsolete define-child-mode))
      ;; FIXME: We should handle this some other way!
      (define-child-mode c++-mode c-mode
      "`c++-mode' uses the same parser as `c-mode'."))
and
    (with-suppressed-warnings ((obsolete define-child-mode))
      ;; FIXME: We should handle this some other way!
      (define-child-mode lisp-mode emacs-lisp-mode
        "Make `lisp-mode' inherit mode local behavior from `emacs-lisp-mode'."))

Any idea why the `with-suppressed-warnings` doesn't actually suppress
the warning?  Any hope you could fix it?


        Stefan