X-Git-Url: https://git.dlugolecki.net.pl/?a=blobdiff_plain;ds=sidebyside;f=Makefile.inc;fp=Makefile.inc;h=a8e17c75fc46f4b0a44b05296e7448c6b214cbdb;hb=d16249bdb641672de45a578543f962e9e8fb25f0;hp=f86ad01d7b2867f6d5869c446567a5b52557c61a;hpb=39f76894fd10baca98de8b91dcf98a0b8d4997c8;p=gedcom-parse.git

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