Question

I downloaded and compiled the development branch of CEDET, and I load it according to the guide on the webpage, but when I start Emacs, i get

error: EIEIO Version 1.3 already loaded; load CEDET at the beginning of your init file to avoid this.

This is literally the first lines of my .emacs in ~/.emacs:

(load-file "~/.emacs.d/cedet/common/cedet.el")
(semantic-load-enable-excessive-code-helpers)

(global-ede-mode t)

(require 'semantic-ia)
(require 'semantic-gcc)
(require 'semanticdb)

I seriously don’t see what is wrong. I am also an Emacs newbie 😛 thanks for the help.
Cheers

Answer 1

IMO the error is self descriptive. Place your snippet at the begining of .emacs

Actualy Loading developement version is little different. Here is my relevent parts of my .emacs file. (change path of the cedet accordingly)

(unless (featurep 'cedet)
  (when (file-directory-p "~/.emacs.d/el-get/cedet")
    (progn
      (add-to-list 'load-path  "~/.emacs.d/el-get/cedet")
      (load-file "~/.emacs.d/el-get/cedet/cedet-devel-load.el"))))

;;; ede
(setq semantic-default-submodes
      '(;; cache(?)
        global-semanticdb-minor-mode

        global-semantic-highlight-edits-mode
        global-semantic-idle-local-symbol-highlight-mode
        ;; global-cedet-m3-minor-mode

        ;; code helpers
        global-semantic-idle-scheduler-mode
        global-semantic-idle-summary-mode
        global-semantic-idle-completions-mode

        ;; eye candy
        global-semantic-decoration-mode
        global-semantic-highlight-func-mode
        global-semantic-highlight-edits-mode
        global-semantic-stickyfunc-mode

        ;; debugging semantic itself
        ;;global-semantic-show-parser-state-mode 1   ;; show the parsing state in the mode line
        ;;global-semantic-show-unmatched-syntax-mode 1
        ))

(global-ede-mode 1)