Add some rules to make the pdf

doc/guide/Makefile

@@ -6,10 +6,17 @@ TEX_FILES = gfdl.tex introduction.tex  modules.tex  prog-zodb.tex  \
 
 MKHOWTO=$(PYTHONSRC)/Doc/tools/mkhowto
 
+all: pdf html
+
+pdf: zodb.pdf
+
+zodb.pdf: $(TEX_FILES)
+	$(MKHOWTO) --pdf zodb.tex
+
 zodb.dvi: $(TEX_FILES)
 	$(MKHOWTO) --dvi zodb.tex
 
-html:
+html: $(TEX_FILES)
 	-rm -rf zodb
 	$(MKHOWTO) --html --iconserver=/python/writing/icons zodb.tex
 #	rm -f /home/amk/www/zodb/guide/*