xmlDocSetRootElement  454 opal/mca/hwloc/hwloc201/hwloc/hwloc/topology-xml-libxml.c   xmlDocSetRootElement(doc, root_node);
xmlDocSetRootElement  526 opal/mca/hwloc/hwloc201/hwloc/hwloc/topology-xml-libxml.c   xmlDocSetRootElement(doc, root_node);