Fix pause check with version info

[tlwilmar]

Summary

Add 5.0 guard to pause code. For now anyhow.

[hbae]

LGTM.

openmp/trunk/runtime/src/kmp_runtime.cpp

if (gtid == KMP_GTID_SHUTDOWN) {
 
       KA_TRACE(10,
                ("__kmp_internal_end_thread: worker thread done, exiting T#%d\n",
                 gtid));
       return;
     }
   }
 #if KMP_DYNAMIC_LIB
-  // AC: lets not shutdown the Linux* OS dynamic library at the exit of uber
-  // thread, because we will better shutdown later in the library destructor.
-  // The reason of this change is performance problem when non-openmp thread in
-  // a loop forks and joins many openmp threads. We can save a lot of time
-  // keeping worker threads alive until the program shutdown.
-  // OM: Removed Linux* OS restriction to fix the crash on OS X* (DPD200239966)
-  // and Windows(DPD200287443) that occurs when using critical sections from
-  // foreign threads.
-  if (__kmp_pause_status != kmp_hard_paused) {
+#if OMP_50_ENABLED
+  if (__kmp_pause_status != kmp_hard_paused)
+#endif
+  // AC: lets not shutdown the dynamic library at the exit of uber thread,
+  // because we will better shutdown later in the library destructor.
+  {
     KA_TRACE(10, ("__kmp_internal_end_thread: exiting T#%d\n", gtid_req));
     return;
   }
 #endif
   /* synchronize the termination process */
   __kmp_acquire_bootstrap_lock(&__kmp_initz_lock);
 
   /* have we already finished */