force dbServiceIO to register with CA

src/db/dbCa.c

@@ -79,6 +79,7 @@ static void addAction(caLink *pca, short link_action)
 
 void epicsShareAPI dbCaLinkInit(void)
 {
+        dbServiceIOInit();
 	ellInit(&caList);
 	caListSem = semMutexMustCreate();
 	caWakeupSem = semBinaryMustCreate(semEmpty);

src/db/dbServiceIO.cpp

@@ -34,7 +34,11 @@ private:
     dbServiceIO dbio;
 };
 
-static dbServiceIOLoadTimeInit lti;
+// The following is just to force lti to be constructed
+extern "C" void dbServiceIOInit()
+{
+    static dbServiceIOLoadTimeInit lti;
+}
 
 dbServiceIOLoadTimeInit::dbServiceIOLoadTimeInit ()
 {