RTEMS: Time registration when dynamically loading

The old test for discriminating between statically and dynamically
linked applications (os/RTEMS/osdTime.cpp:staticTimeRegister()) is
wrong, it never detects a dynamically loaded app.

fixes lp:831648
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modified:
  src/libCom/osi/os/RTEMS/osdTime.cpp

src/libCom/osi/os/RTEMS/osdTime.cpp

@@ -18,6 +18,7 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <rtems/rtems_bsdnet_internal.h>
 #include "epicsTime.h"
 #include "osdTime.h"
 #include "osiNTPTime.h"
@@ -117,17 +118,21 @@ double rtemsTicksPerSecond_double, rtemsTicksPerTwoSeconds_double;
  * explicitly calls osdTimeRegister() at the appropriate time.
  * However if we are loaded dynamically we *do* register our
  * standard time providers at static constructor time; in this
- * case the tick rate will have been set already.
+ * case the network is available already.
  */
 static int staticTimeRegister(void)
 {
-    if (rtemsTicksPerSecond != 0)
-        osdTimeRegister();
-
     rtems_clock_get (RTEMS_CLOCK_GET_TICKS_PER_SECOND, &rtemsTicksPerSecond);
     rtemsTicksPerSecond_double = rtemsTicksPerSecond;
     rtemsTicksPerTwoSeconds_double = rtemsTicksPerSecond_double * 2.0;
 
+    /* If networking is already up at the time static constructors
+     * are executed then we are probably run-time loaded and it's
+     * OK to osdTimeRegister() at this point.
+     */
+    if (rtems_bsdnet_ticks_per_second != 0)
+        osdTimeRegister();
+
     return 1;
 }
 static int done = staticTimeRegister();