--- a/jdk/make/tools/Makefile	Thu Jun 30 16:50:34 2011 -0700
+++ b/jdk/make/tools/Makefile	Thu Jun 30 17:59:13 2011 -0700
@@ -28,6 +28,8 @@
 #
 
 BUILDDIR = ..
+
+SUBDIRS_MAKEFLAGS += JAVAC_MAX_WARNINGS=true JAVAC_WARNINGS_FATAL=true
 include $(BUILDDIR)/common/Defs.gmk
 
 # Note: freetypecheck is built by Sanity.gmk if needed