From 33f8eee3edc04006e89c4d3830e26b89b8b833b0 Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@suse.de>
Date: Mon, 24 Feb 2003 23:49:27 +0000
Subject: [PATCH] (makefile-font-lock-keywords): Protect shell variable
 references by requireing that $ is not preceded by another $.

---
 lisp/progmodes/make-mode.el | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/lisp/progmodes/make-mode.el b/lisp/progmodes/make-mode.el
index dcab340ec82..4ffdfdef011 100644
--- a/lisp/progmodes/make-mode.el
+++ b/lisp/progmodes/make-mode.el
@@ -1,6 +1,6 @@
 ;;; make-mode.el --- makefile editing commands for Emacs
 
-;; Copyright (C) 1992,94,99,2000,2001, 2002  Free Software Foundation, Inc.
+;; Copyright (C) 1992,94,99,2000,2001, 2002, 2003  Free Software Foundation, Inc.
 
 ;; Author: Thomas Neumann <tom@smart.bo.open.de>
 ;;	Eric S. Raymond <esr@snark.thyrsus.com>
@@ -269,14 +269,13 @@ not be enclosed in { } or ( )."
    (list makefile-dependency-regex 1 'font-lock-function-name-face)
 
    ;; Variable references even in targets/strings/comments.
-   '("\\$[({]\\([-a-zA-Z0-9_.]+\\|[@%<?^+*][FD]?\\)[}):]"
+   '("[^$]\\$[({]\\([-a-zA-Z0-9_.]+\\|[@%<?^+*][FD]?\\)[}):]"
      1 font-lock-constant-face prepend)
 
-   ;; Automatic variable references and single character variable references...
-   '("\\$\\([@%<?^+*_]\\|[a-zA-Z0-9]\\>\\)" 1 font-lock-constant-face prepend)
-
-   ;; ...but not shell variables references.
-   '("\\$\\$\\(\\sw+\\)" 1 'default t)
+   ;; Automatic variable references and single character variable references,
+   ;; but not shell variables references.
+   '("[^$]\\$\\([@%<?^+*_]\\|[a-zA-Z0-9]\\>\\)"
+     1 font-lock-constant-face prepend)
 
    ;; Fontify conditionals and includes.
    ;; Note that plain `if' is an automake conditional, and not a bug.
-- 
2.39.2