I'm (once again ...) porting clojure-mode, and needed this patch.
2014-09-27 Michael Sperber <mike(a)xemacs.org>
* custom.el (defcustom):
(custom-handle-keyword): Handle :package-version without bailing out.
Will push Monday if nobody objects.
--
Regards,
Mike
diff --git a/lisp/custom.el b/lisp/custom.el
--- a/lisp/custom.el
+++ b/lisp/custom.el
@@ -274,6 +274,15 @@
VALUE should be a string specifying that the variable was
first introduced, or its default value was changed, in Emacs
version VERSION.
+:package-version
+ VALUE should be a list with the form (PACKAGE . VERSION)
+ specifying that the variable was first introduced, or its
+ default value was changed, in PACKAGE version VERSION. This
+ keyword takes priority over :version. The PACKAGE and VERSION
+ must appear in the alist `customize-package-emacs-version-alist'.
+ Since PACKAGE must be unique and the user might see it in an
+ error message, a good choice is the official name of the
+ package, such as MH-E or Gnus.
:tag LABEL
Use LABEL, a string, instead of the item's name, to label the item
in customization menus and buffers.
@@ -458,6 +467,8 @@
(custom-add-to-group value symbol type))
((eq keyword :version)
(custom-add-version symbol value))
+ ((eq keyword :package-version)
+ (custom-add-package-version symbol value))
((eq keyword :link)
(custom-add-link symbol value))
((eq keyword :load)
@@ -507,6 +518,10 @@
"To the custom option SYMBOL add the version VERSION."
(put symbol 'custom-version version))
+(defun custom-add-package-version (symbol version)
+ "To the custom option SYMBOL add the package version VERSION."
+ (put symbol 'custom-package-version version))
+
(defun custom-add-load (symbol load)
"To the custom option SYMBOL add the dependency LOAD.
LOAD should be either a library file name, or a feature name."
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