Редактор выдает undefined reference to `Test::Test(int, int, int, int)'

Question

Test.cpp file

#include "Test.hpp"
template <typename T>
T Test::sum(T t1, T t2) {
}
Test::Test(int a, int b, int c, int d) : a(a), b(b), c(c), d(d) {};

Test.hpp file

#ifndef RO_TEST_HPP
#define RO_TEST_HPP
#define RO_MACRO_3 false
#define RO_MACRO_2 true
#define RO_MACRO_1  RO_MACRO_2 && RO_MACRO_3
class Test {
public:
    const static int st = 10;
    int a,b,c,d;
Test(int a, int b, int c, int d);



template <typename T>
T sum(T t1, T t2);


};
#endif

Main.cpp file

#include <boost/date_time.hpp>
#include "Test.hpp"
using namespace std;
int main(int argc, char *argv[]) {
Test * test  =  new Test(1,3,5,6);

std::vector&lt;int&gt; v = {1,2,3,4,5};

for (auto el : v) {
}

cout &lt;&lt; &quot;&quot;;



}