--- old/src/hotspot/os/linux/os_linux.hpp	Tue Nov 14 05:34:24 2017
+++ new/src/hotspot/os/linux/os_linux.hpp	Tue Nov 14 05:34:23 2017
@@ -127,7 +127,6 @@
 
   static address   initial_thread_stack_bottom(void)                { return _initial_thread_stack_bottom; }
   static uintptr_t initial_thread_stack_size(void)                  { return _initial_thread_stack_size; }
-  static bool is_initial_thread(void);
 
   static int page_size(void)                                        { return _page_size; }
   static void set_page_size(int val)                                { _page_size = val; }