Do not reference pthread_atfork in non-SMP_SERVER mode

driver/others/memory.c

@@ -264,7 +264,7 @@ void openblas_fork_handler()
   //   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60035
   // In the mean time build with USE_OPENMP=0 or link against another
   // implementation of OpenMP.
-#ifndef OS_WINDOWS
+#if !defined(OS_WINDOWS) && defined(SMP_SERVER)
   int err;
   err = pthread_atfork (BLASFUNC(blas_thread_shutdown), NULL, NULL);
   if(err != 0)