c++11 - Undefined Reference issue with C++ and Netbeans -

i have following files:

listaenc.hpp

#include "elemento.hpp" #include <cstdlib> #include <iostream>  template<typename t> class listaenc {  public:     listaenc();     ~listaenc(); ... }  //implementation: template<typename t> listaenc<t>::listaenc() {     head = null;     size = 0; }  template <class t> listaenc<t>::~listaenc() {  } 

main.cpp:

#include "listaenc.hpp" using namespace std;  int main(int argc, char** argv) {     listaenc<int>* teste = new listaenc<int>();      return 0; } 

poligono.hpp

#ifndef poligono_hpp #define poligono_hpp  #include "ponto.hpp" #include "listaenc.hpp" #include <string>  using namespace std; public:     //construtores     poligono(listaenc<ponto> pontos, string nome);     poligono(const poligono& orig);     virtual ~poligono();      //metodos     string obternome();     void adicionarponto(ponto);     listaenc<ponto> obterpontos(); private:     listaenc<ponto> pontos;     string nome; };  #endif  /* poligono_hpp */ 

poligono.cpp

#include "poligono.hpp"    * poligono::poligono(listaenc<ponto> pontos, string nome) {     this->pontos = pontos;     this->nome = nome; }  * poligono::poligono(const poligono& orig) { }  * poligono::~poligono() { }  //metodo string poligono::obternome() {     return this->nome; }  listaenc<ponto> poligono::obterpontos() {     return this->pontos; }  void poligono::adicionarponto(ponto p) {     this->pontos.adiciona(p); } 

i these compile errors on poligono.cpp:

/home/mariana/netbeansprojects/trabalhocg/poligono.cpp:12: undefined reference `listaenc::~listaenc()'

the destructor listaenc empty, implemented. know how solve problem?

edit: added implementation of constructor , destructor listaenc. error appears in bit of code added poligono.cpp, listaenc 1 of parameters.

edit2: have added asterisk points in poligono.cpp error appears (the first constructor, second constructor , destructor)

since posted code shows

#ifndef poligono_hpp #define poligono_hpp 

in poligono.cpp, don't have same in listaenc.hpp, assume missing include guards in header?

depending on other code included in poligono.cpp, result in definition of template listaenc twice. under c++ standard if break 1 definition rule may linking error , no other diagnostic message.

so, maybe make sure there include guards in listaenc.hpp ?

if post more code update answer :)

edit: suggestion, if having trouble finding dtor definition of listaenc, might try moving implementation of class body? makes less typo cause lost. since code in header doesn't change otherwise.