bug#27202: 26.0.50; Eldoc mode is broken

[Stephen Berman]

On Sat, 03 Jun 2017 00:16:25 +0200 Stephen Berman <stephen.berman@gmx.net> 
wrote:

> On Sat, 3 Jun 2017 00:18:33 +0300 Dmitry Gutov <dgutov@yandex.ru> wrote:
>
>> On 6/2/17 10:53 PM, Stephen Berman wrote:
>>> 0. emacs -Q
>>> 1. M-: (car SPC
>>> => No function signature in the mode line, whereas before the breakage
>>>     the mode line would display this:
>>>     car: (LIST)
>>
>> Please try 'make bootstrap'. It also stopped working on my machine until I've
>> done that.
>
> Boostrapping latest master didn't fix it here.

I manually reverted this part of 2349f1df1b:

-(define-minor-mode global-eldoc-mode
-  "Toggle Global Eldoc mode on or off.
-With a prefix argument ARG, enable Global Eldoc mode if ARG is
-positive, and disable it otherwise.  If called from Lisp, enable
-the mode if ARG is omitted or nil, and toggle it if ARG is ‘toggle’.
-
-If Global Eldoc mode is on, `eldoc-mode' will be enabled in all
-buffers where it's applicable.  These are buffers that have modes
-that have enabled eldoc support.  See `eldoc-documentation-function'."
+(define-globalized-minor-mode global-eldoc-mode eldoc-mode turn-on-eldoc-mode
   :group 'eldoc
-  :global t
   :initialize 'custom-initialize-delay
-  :init-value t
-  (setq eldoc-last-message nil)
-  (if global-eldoc-mode
-      (progn
-       (add-hook 'post-command-hook #'eldoc-schedule-timer)
-       (add-hook 'pre-command-hook #'eldoc-pre-command-refresh-echo-area))
-    (remove-hook 'post-command-hook #'eldoc-schedule-timer)
-    (remove-hook 'pre-command-hook #'eldoc-pre-command-refresh-echo-area)))
+  :init-value t)

then rebuilt Emacs (just make, not bootstrap), and now Eldoc in the
modeline works here again.

Steve Berman