src/share/vm/runtime/arguments.cpp

*** 44,53 ****
--- 44,54 ----
  #include "runtime/vm_version.hpp"
  #include "services/management.hpp"
  #include "services/memTracker.hpp"
  #include "utilities/defaultStream.hpp"
  #include "utilities/macros.hpp"
+ #include "utilities/semaphore.hpp"
  #include "utilities/stringUtils.hpp"
  #if INCLUDE_ALL_GCS
  #include "gc/cms/compactibleFreeListSpace.hpp"
  #include "gc/g1/g1CollectedHeap.inline.hpp"
  #include "gc/parallel/parallelScavengeHeap.hpp"
*** 3862,3871 ****
--- 3863,3880 ----
      FLAG_SET_DEFAULT(PrintSharedSpaces, false);
    }
    no_shared_spaces("CDS Disabled");
  #endif // INCLUDE_CDS
  
+   // The Semaphore class isn't implemented on all platforms.
+ #if !IMPLEMENTS_SEMAPHORE_CLASS
+   if (UseSemaphoreGCThreadsSynchronization && FLAG_IS_CMDLINE(UseSemaphoreGCThreadsSynchronization)) {
+     warning("Semaphore GC Thread Synchronization is not implemented for this platform");
+     FLAG_SET_DEFAULT(UseSemaphoreGCThreadsSynchronization, false);
+   }
+ #endif
+ 
    return JNI_OK;
  }
  
  jint Arguments::apply_ergo() {