--- old/make/Javadoc.gmk	2017-03-23 16:42:43.000000000 -0700
+++ new/make/Javadoc.gmk	2017-03-23 16:42:43.000000000 -0700
@@ -174,6 +174,7 @@
     -tag param \
     -tag return \
     -tag throws \
+    -taglet build.tools.taglet.ModuleGraph \
     -tag since \
     -tag version \
     -tag serialData \
@@ -188,6 +189,11 @@
 DEFAULT_JAVADOC_OPTIONS := -XDignore.symbol.file=true -use -keywords -notimestamp \
     -serialwarn -encoding ISO-8859-1 -breakiterator --system none
 
+#
+# TODO: this should be set by the configure option.
+#
+JAVADOC_MODULE_GRAPH=false
+
 ################################################################################
 # Setup make rules for running javadoc.
 #
@@ -321,7 +327,8 @@
 	  $$(eval $$(call ListPathsSafely, $1_PACKAGES, $$($1_PACKAGES_FILE)))
         endif
 	$$(call ExecuteWithLog, $$(SUPPORT_OUTPUTDIR)/docs/$1.javadoc, \
-	    $$($1_JAVA) -Djava.awt.headless=true $(NEW_JAVADOC) -d $$(@D) \
+	    $$($1_JAVA) -Djava.awt.headless=true -DenableModuleGraph=$(JAVADOC_MODULE_GRAPH) \
+		$(NEW_JAVADOC) -d $$(@D) \
 	        $$(DEFAULT_JAVADOC_TAGS) $$(DEFAULT_JAVADOC_OPTIONS) \
 	        --module-source-path $$(call PathList, $$(JAVADOC_SOURCE_DIRS)) \
 	        $$($1_OPTIONS) $$($1_PACKAGES_ARG))