diff -r 758deedaae84 -r 54eda3aad6dd make/langtools/build.properties
--- a/make/langtools/build.properties	Wed May 09 13:37:05 2018 +0200
+++ b/make/langtools/build.properties	Wed May 09 17:14:29 2018 +0200
@@ -24,9 +24,7 @@
 #
 
 #javac configuration for "normal build" (these will be passed to the bootstrap compiler):
-javac.opts = -XDignore.symbol.file=true -Xlint:all,-deprecation,-options,-exports -Werror -g:source,lines,vars
-javac.source = 9
-javac.target = 9
+javac.opts = -XDignore.symbol.file=true -Xlint:all,-deprecation,-exports -Werror -g:source,lines,vars
 
 #version used to compile build tools
 javac.build.opts = -XDignore.symbol.file=true -Xlint:all,-deprecation,-options -Werror -g:source,lines,vars