Using TinyXML ( linking libraries ? in c++ )

+Hi... i am a newbie ... and i don't know how to include external libraries in c++. This is sooo hard. I want to use TinyXML. so i made this : example2.cpp ``` #include <iostream> #include "tinyxml.h" void write_app_settings_doc( ) { TiXmlDocument doc; TiXmlElement* msg; TiXmlDeclaration* decl = new TiXmlDeclaration( "1.0", "", "" ); doc.LinkEndChild( decl ); TiXmlElement * root = new TiXmlElement( "MyApp" ); doc.LinkEndChild( root ); TiXmlComment * comment = new TiXmlComment(); comment->SetValue(" Settings for MyApp " ); root->LinkEndChild( comment ); TiXmlElement * msgs = new TiXmlElement( "Messages" ); root->LinkEndChild( msgs ); msg = new TiXmlElement( "Welcome" ); msg->LinkEndChild( new TiXmlText( "Welcome to MyApp" )); msgs->LinkEndChild( msg ); msg = new TiXmlElement( "Farewell" ); msg->LinkEndChild( new TiXmlText( "Thank you for using MyApp" )); msgs->LinkEndChild( msg ); TiXmlElement * windows = new TiXmlElement( "Windows" ); root->LinkEndChild( windows ); TiXmlElement * window; window = new TiXmlElement( "Window" ); windows->LinkEndChild( window ); window->SetAttribute("name", "MainFrame"); window->SetAttribute("x", 5); window->SetAttribute("y", 15); window->SetAttribute("w", 400); window->SetAttribute("h", 250); TiXmlElement * cxn = new TiXmlElement( "Connection" ); root->LinkEndChild( cxn ); cxn->SetAttribute("ip", "192.168.0.1"); cxn->SetDoubleAttribute("timeout", 123.456); // floating point attrib doc.SaveFile( "appsettings.xml" ); } int main() { write_app_settings_doc( ); return 0; } ``` just an example file. So ..when i compile this with : g++ example2.cpp i get following error message: ``` /tmp/cc6npUsW.o: In function `write_app_settings_doc()': example2.cpp:(.text+0x13): undefined reference to `TiXmlDocument::TiXmlDocument()' example2.cpp:(.text+0x43): undefined reference to `TiXmlDeclaration::TiXmlDeclaration(char const*, char const*, char const*)' example2.cpp:(.text+0x58): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x8f): undefined reference to `TiXmlElement::TiXmlElement(char const*)' example2.cpp:(.text+0xa4): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x112): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x132): undefined reference to `TiXmlElement::TiXmlElement(char const*)' example2.cpp:(.text+0x147): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x17e): undefined reference to `TiXmlElement::TiXmlElement(char const*)' example2.cpp:(.text+0x1cb): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x1f4): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x214): undefined reference to `TiXmlElement::TiXmlElement(char const*)' example2.cpp:(.text+0x261): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x28a): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x2aa): undefined reference to `TiXmlElement::TiXmlElement(char const*)' example2.cpp:(.text+0x2bf): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x2f6): undefined reference to `TiXmlElement::TiXmlElement(char const*)' example2.cpp:(.text+0x30b): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x33d): undefined reference to `TiXmlElement::SetAttribute(char const*, char const*)' example2.cpp:(.text+0x358): undefined reference to `TiXmlElement::SetAttribute(char const*, int)' example2.cpp:(.text+0x373): undefined reference to `TiXmlElement::SetAttribute(char const*, int)' example2.cpp:(.text+0x38e): undefined reference to `TiXmlElement::SetAttribute(char const*, int)' example2.cpp:(.text+0x3a9): undefined reference to `TiXmlElement::SetAttribute(char const*, int)' example2.cpp:(.text+0x3c9): undefined reference to `TiXmlElement::TiXmlElement(char const*)' example2.cpp:(.text+0x3de): undefined reference to `TiXmlNode::LinkEndChild(TiXmlNode*)' example2.cpp:(.text+0x40d): undefined reference to `TiXmlElement::SetAttribute(char const*, char const*)' example2.cpp:(.text+0x42a): undefined reference to `TiXmlElement::SetDoubleAttribute(char const*, double)' example2.cpp:(.text+0x43d): undefined reference to `TiXmlDocument::SaveFile(char const*) const' /tmp/cc6npUsW.o: In function `TiXmlString::operator=(char const*)': example2.cpp:(.text._ZN11TiXmlStringaSEPKc[TiXmlString::operator=(char const*)]+0x23): undefined reference to `TiXmlString::assign(char const*, unsigned int)' /tmp/cc6npUsW.o: In function `TiXmlString::quit()': example2.cpp:(.text._ZN11TiXmlString4quitEv[TiXmlString::quit()]+0xc): undefined reference to `TiXmlString::nullrep_' /tmp/cc6npUsW.o: In function `TiXmlComment::TiXmlComment()': example2.cpp:(.text._ZN12TiXmlCommentC1Ev[TiXmlComment::TiXmlComment()]+0x15): undefined reference to `TiXmlNode::TiXmlNode(TiXmlNode::NodeType)' example2.cpp:(.text._ZN12TiXmlCommentC1Ev[TiXmlComment::TiXmlComment()]+0x1e): undefined reference to `vtable for TiXmlComment' /tmp/cc6npUsW.o: In function `TiXmlText::TiXmlText(char const*)': example2.cpp:(.text._ZN9TiXmlTextC1EPKc[TiXmlText::TiXmlText(char const*)]+0x17): undefined reference to `TiXmlNode::TiXmlNode(TiXmlNode::NodeType)' example2.cpp:(.text._ZN9TiXmlTextC1EPKc[TiXmlText::TiXmlText(char const*)]+0x20): undefined reference to `vtable for TiXmlText' example2.cpp:(.text._ZN9TiXmlTextC1EPKc[TiXmlText::TiXmlText(char const*)]+0x4f): undefined reference to `TiXmlNode::~TiXmlNode()' /tmp/cc6npUsW.o: In function `TiXmlDocument::~TiXmlDocument()': example2.cpp:(.text._ZN13TiXmlDocumentD1Ev[TiXmlDocument::~TiXmlDocument()]+0xb): undefined reference to `vtable for TiXmlDocument' example2.cpp:(.text._ZN13TiXmlDocumentD1Ev[TiXmlDocument::~TiXmlDocument()]+0x24): undefined reference to `TiXmlNode::~TiXmlNode()' collect2: ld returned 1 exit status ``` I am mostly a java developer and i have a lot of problems in c++ to use external libraries. I dont know when to link . when to include. when i have to make -I/myincludepath/ these files are in the same folder : example.cpp tinyxml.h tinyxml.cpp tinystr.h tinystr.cpp Can somebody help me ?