--- old/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java	2017-09-07 03:39:35.618308256 -0400
+++ new/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java	2017-09-07 03:39:33.810205110 -0400
@@ -74,7 +74,10 @@
     JDK1_9("1.9"),
 
     /** 1.10 covers the to be determined language features that will be added in JDK 10. */
-    JDK1_10("1.10");
+    JDK1_10("1.10"),
+
+    JDK_11("11");
+
 
     private static final Context.Key<Source> sourceKey = new Context.Key<>();
 
@@ -103,6 +106,7 @@
         tab.put("8", JDK1_8); // Make 8 an alias for 1.8
         tab.put("9", JDK1_9); // Make 9 an alias for 1.9
         tab.put("10", JDK1_10); // Make 10 an alias for 1.10
+        tab.put("11", JDK_11);
     }
 
     private Source(String name) {
@@ -113,13 +117,14 @@
 
     private static final Source MAX = values()[values().length - 1];
 
-    public static final Source DEFAULT = MAX;
+    public static final Source DEFAULT = JDK1_10; // MAX; - FIXME later
 
     public static Source lookup(String name) {
         return tab.get(name);
     }
 
     public Target requiredTarget() {
+        if (this.compareTo(JDK_11) >= 0) return Target.JDK_11;
         if (this.compareTo(JDK1_10) >= 0) return Target.JDK1_10;
         if (this.compareTo(JDK1_9) >= 0) return Target.JDK1_9;
         if (this.compareTo(JDK1_8) >= 0) return Target.JDK1_8;
@@ -247,6 +252,8 @@
             return RELEASE_9;
         case JDK1_10:
             return RELEASE_10;
+        case JDK_11:
+            return RELEASE_11;
         default:
             return null;
         }