diff -r 90583d625648 -r 021728c71030 doc-src/System/Makefile
--- a/doc-src/System/Makefile	Mon May 10 15:35:03 1999 +0200
+++ b/doc-src/System/Makefile	Mon May 10 16:35:22 1999 +0200
@@ -24,3 +24,12 @@
 	$(LATEX) $(NAME)
 	$(SEDINDEX) $(NAME)
 	$(LATEX) $(NAME)
+
+pdf: $(NAME).pdf
+
+$(NAME).pdf: $(FILES) isabelle.pdf
+	touch $(NAME).ind
+	$(PDFLATEX) $(NAME)
+	$(PDFLATEX) $(NAME)
+	$(SEDINDEX) $(NAME)
+	$(PDFLATEX) $(NAME)