src/jdk.internal.opt/share/classes/module-info.java

@@ -27,7 +27,13 @@
   * Internal option processing API
   *
   * @since 9
   */
  module jdk.internal.opt {
-     exports jdk.internal.joptsimple to jdk.jlink, jdk.jshell;
+     exports jdk.internal.joptsimple to
+         jdk.incubator.jextract,
+         jdk.jlink,
+         jdk.jshell;
+ 
+     exports jdk.internal.joptsimple.util to
+         jdk.incubator.jextract;
  }