- (add-function :before-until (local 'eldoc-documentation-function)
- #'cfengine3-documentation-function)
+ (if (boundp 'eldoc-documentation-functions)
+ (add-hook 'eldoc-documentation-functions
+ #'cfengine3-documentation-function nil t)
+ ;; For emacs < 25.1 where `eldoc-documentation-function' defaults to
+ ;; nil.
+ (or eldoc-documentation-function
+ (setq-local eldoc-documentation-function #'ignore))
+ (add-function :before-until (local 'eldoc-documentation-function)
+ #'cfengine3-documentation-function))