Add warning to generated Doxyfile to edit Doxyfile.in.

git-svn-id: svn://svn.berlios.de/openocd/trunk@1917 b42882b7-edfa-0310-969c-e2dbd0fdcd60

Makefile.am

@@ -18,7 +18,12 @@ EXTRA_DIST = \
 docs: pdf html doxygen
 
 Doxyfile: $(srcdir)/Doxyfile.in
-	sed -e 's,@srcdir\@,$(srcdir),' $< > $@
+	@echo "Creating $@ from $<..."
+	@( \
+	  echo "### @@@ -= DO NOT EDIT THIS FILE =- @@@ ###" && \
+	  echo "### @@@ Make changes to Doxyfile.in @@@ ###" && \
+	  sed -e 's,@srcdir\@,$(srcdir),' $< \
+	) > $@
 
 doxygen::
 	$(MAKE) Doxyfile