docs won't build because of missing variables in CoreDDoc mode

src/core/thread.d

@@ -1815,23 +1815,20 @@ unittest
 
 version( CoreDdoc )
 {
-    /** 
-     * Instruct the thread module, when initialized, to use a different set of 
+    /**
+     * Instruct the thread module, when initialized, to use a different set of
      * signals besides SIGUSR1 and SIGUSR2 for suspension and resumption of threads.
      * This function should be called at most once, prior to thread_init().
      * This function is Posix-only.
-     */  
+     */
     extern (C) void thread_setGCSignals(int suspendSignalNo, int resumeSignalNo)
     {
     }
 }
 else version( Posix )
 {
-    __gshared int suspendSignalNumber;
-    __gshared int resumeSignalNumber;
-
     extern (C) void thread_setGCSignals(int suspendSignalNo, int resumeSignalNo)
-    in 
+    in
     {
         assert(suspendSignalNumber == 0);
         assert(resumeSignalNumber  == 0);
@@ -1850,6 +1847,12 @@ else version( Posix )
     }
 }
 
+version( Posix )
+{
+    __gshared int suspendSignalNumber;
+    __gshared int resumeSignalNumber;
+}
+
 /**
  * Initializes the thread module.  This function must be called by the
  * garbage collector on startup and before any other thread routines
@@ -1873,7 +1876,7 @@ extern (C) void thread_init()
         if( suspendSignalNumber == 0 )
         {
             suspendSignalNumber = SIGUSR1;
-        } 
+        }
 
         if( resumeSignalNumber == 0 )
         {