--- old/src/hotspot/share/gc/shared/generation.hpp	2018-04-27 15:31:23.714199437 +0200
+++ new/src/hotspot/share/gc/shared/generation.hpp	2018-04-27 15:31:23.462199445 +0200
@@ -400,6 +400,7 @@
   GCStats* gc_stats() const { return _gc_stats; }
   virtual void update_gc_stats(Generation* current_generation, bool full) {}
 
+#if INCLUDE_SERIALGC
   // Mark sweep support phase2
   virtual void prepare_for_compaction(CompactPoint* cp);
   // Mark sweep support phase3
@@ -407,6 +408,7 @@
   // Mark sweep support phase4
   virtual void compact();
   virtual void post_compact() { ShouldNotReachHere(); }
+#endif
 
   // Support for CMS's rescan. In this general form we return a pointer
   // to an abstract object that can be used, based on specific previously