Allow calls from RTEMS test harness.

src/libCom/test/epicsThreadPrivateTest.cpp

@@ -58,7 +58,7 @@ inline void callItTenTimesSquared ()
     callItTenTimes ();
 }
 
-void epicsThreadPrivateTest ()
+extern "C" void epicsThreadPrivateTest ()
 {
     static bool var;
     priv.set ( &var );

src/libCom/test/epicsThreadPrivateTestMain.cpp

@@ -12,7 +12,7 @@
 
 /* Author: Jeff Hill Date:    March 28 2001 */
 
-void epicsThreadPrivateTest ();
+extern "C" void epicsThreadPrivateTest ();
 
 int main ()
 {

src/libCom/test/epicsTimerTest.cpp

@@ -347,7 +347,7 @@ void testPeriodic ()
     queue.release ();
 }
 
-void epicsTimerTest ()
+extern "C" void epicsTimerTest ()
 {
     testExpireDestroy ();
     testAccuracy ();

src/libCom/test/epicsTimerTestMain.cpp

@@ -17,7 +17,7 @@
  *
  */
 
-void epicsTimerTest ( void );
+extern "C" void epicsTimerTest ( void );
 
 int main ( int /* argc */, char /* *argv[] */ )
 {