(makefile-runtime-macros-list): Add + to the list.

diff --git a/lisp/progmodes/make-mode.el b/lisp/progmodes/make-mode.el
index 3a4ddff5bf8bcebd7f19f68a6a506d7031977669..9479fd6ecc87e9751168dacda3fa7534647dd751 100644 (file)
--- a/lisp/progmodes/make-mode.el
+++ b/lisp/progmodes/make-mode.el
@@ -178,7 +178,7 @@ You will be offered to complete on one of those in the minibuffer whenever
 you enter a \".\" at the beginning of a line in makefile-mode.")
 
 (defvar makefile-runtime-macros-list
-  '(("@") ("&") (">") ("<") ("*") ("^") ("?") ("%") ("$"))
+  '(("@") ("&") (">") ("<") ("*") ("^") ("+") ("?") ("%") ("$"))
   "List of macros that are resolved by make at runtime.
 If you insert a macro reference using makefile-insert-macro-ref, the name
 of the macro is checked against this list. If it can be found its name will