(diff-command): New variable.

(diff): Use it.

1 files changed, 4 insertions, 1 deletions

diff --git a/lisp/diff.el b/lisp/diff.el
index ff7906a80c4..eb2e4152896 100644
--- a/lisp/diff.el
+++ b/lisp/diff.el
@@ -34,6 +34,9 @@
 (defvar diff-switches "-c"
   "*A string or list of strings specifying switches to be be passed to diff.")
 
+(defvar diff-command "diff"
+  "*The command to use to run diff.")
+
 (defvar diff-regexp-alist
   '(
     ;; -u format: @@ -OLDSTART,OLDEND +NEWSTART,NEWEND @@
@@ -196,7 +199,7 @@ With prefix arg, prompt for diff switches."
     (unwind-protect
         (let ((command
                (mapconcat 'identity
-                          (append '("diff")
+                          (append (list diff-command)
                                   ;; Use explicitly specified switches
                                   (if switches
                                       (if (consp switches)