From: Ken Raeburn <raeburn@raeburn.org>
Date: Wed, 14 Dec 2016 02:49:18 +0000 (-0500)
Subject: Dump defvars for special variables only.
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=fd03b6b4b9898efa0257194e32b149222fcc1f24;p=emacs.git

Dump defvars for special variables only.

* lisp/loadup.el: Don't generate a defvar unless the variable is
special.  Do include an initializer, otherwise defvar is a no-op.
---

diff --git a/lisp/loadup.el b/lisp/loadup.el
index 4de14e9b3c7..c5c4c48910b 100644
--- a/lisp/loadup.el
+++ b/lisp/loadup.el
@@ -535,7 +535,10 @@ lost after dumping")))
                              ol))
                          (v (macroexp-quote v))))
                      cmds)
-               (push `(defvar ,s) cmds)))
+               (if (special-variable-p s)
+                   ;; A dummy initializer is needed for defvar to mark
+                   ;; the variable as special.
+                   (push `(defvar ,s 0) cmds))))
            (when (symbol-plist s)
              (push `(setplist ',s ',(symbol-plist s)) cmds))
            (when (get s 'face-defface-spec)