bash-3.00$ g++  getXMLdata.cpp
/tmp/ccXL127T.o(.text+0x13): In function `LoadXml()':
: undefined reference to `TiXmlDocument::TiXmlDocument[in-charge](char const*)'
/tmp/ccXL127T.o(.text+0x23): In function `LoadXml()':
: undefined reference to `TiXmlDocument::LoadFile(TiXmlEncoding)'
/tmp/ccXL127T.o(.gnu.linkonce.t._ZN13TiXmlDocumentD1Ev+0xb): In function `TiXmlDocument::~TiXmlDocument [in-charge]()':
: undefined reference to `vtable for TiXmlDocument'
/tmp/ccXL127T.o(.gnu.linkonce.t._ZN13TiXmlDocumentD1Ev+0x28): In function `TiXmlDocument::~TiXmlDocument [in-charge]()':
: undefined reference to `TiXmlNode::~TiXmlNode [not-in-charge]()'
collect2: ld returned 1 exit status