--- a/langtools/make/build.properties	Tue Jan 20 15:17:45 2009 -0800
+++ b/langtools/make/build.properties	Tue Jan 20 18:23:13 2009 -0800
@@ -66,7 +66,7 @@
 # set the following to -version to verify the versions of javac being used
 javac.version.opt = 
 # in time, there should be no exceptions to -Xlint:all
-javac.lint.opts = -Xlint:all,-deprecation,-fallthrough,-serial,-unchecked,-cast
+javac.lint.opts = -Xlint:all -Werror
 
 # options for the <javadoc> task for javac
 javadoc.jls3.url=http://java.sun.com/docs/books/jls/