cause i get this error  me.cpp: In function ‘int main(int, char**)’: me.cpp:23:45: error: ‘virConnectCreateXML’ was not declared in this scope  dom = virConnectCreateXML(conn, xmlconfig, 0);                                              ^ me.cpp:27:5: error: return-statement with no value, in function returning ‘int’ [-fpermissive]      return;      ^ me.cpp:30:57: error: ‘virDomainName’ was not declared in this scope  fprintf(stderr, "Guest %s has booted", virDomainName(dom)); for the attached cpp file