How can I use ediff under Windows + NTEmacs?

Question

I have Emacs version 23 on Windows and it seem the ediff executable is missing?

From where can I download ediff for Emacs on Windows?

Answer 1

If you have git for windows installed, then it is enough to add

C:\Program Files\Git\usr\bin\

to your PATH environment variable, because git for windows already ships with a diff executable and installs it in that folder.

Answer 2

You can download diffUtils, extract it, add the path to %PATH% and emacs exec-path in your Emacs init file like that.

(when (string-equal system-type "windows-nt")
  (progn
    (setq diff-path "your-diff-path")
    (setenv "PATH"
            (concat diff-path ";"))
    (setq exec-path
          '(diff-path))))

finally, using M-x diff to compare what you want.