From d16249bdb641672de45a578543f962e9e8fb25f0 Mon Sep 17 00:00:00 2001
From: Peter Verthez <Peter.Verthez@advalvas.be>
Date: Fri, 16 Aug 2002 16:07:07 +0000
Subject: [PATCH] Added rule that can be used to avoid unnecessary
 recompilation of lex files.

---
 Makefile.inc | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/Makefile.inc b/Makefile.inc
index f86ad01..a8e17c7 100644
--- a/Makefile.inc
+++ b/Makefile.inc
@@ -1,4 +1,4 @@
-## File to include in other Makefile's, defining common commands
+## File to include in other Makefile's, defining common commands and rules
 # $Id$
 # $Name$
 
@@ -10,3 +10,14 @@ define replace-VERSION
   mv $$file.new $$file; \
   done
 endef
+
+%.tabgen.h:	%.tab.h
+	if [ ! -r $@ ] ; \
+	then \
+	  touch $@; \
+	fi
+	if ! diff -q $< $@ > /dev/null; \
+	then \
+	  rm $@; \
+	  cp $< $@; \
+	fi
-- 
2.30.2