Linking error (Lnk2019)

class _declspec(dllimport) BaseClass{
virtual void printMsg();
}

class dev: public BaseClass
{
void printMsg()override;
}

#include"dev.h"
void dev::printMsg()
{
staticClass::staticMethod();// LNK 2019 error
}

class staticClass
{
static void staticMethod();
}

Edited by TheOriginals, 22 February 2018 - 11:29.

class staticClass{
public:
static void staticMethod();
};

class _declspec(dllimport) BaseClass {
public:
virtual void printMsg();
};

class dev : public BaseClass
{
public:
void printMsg()override;
};

void dev::printMsg()
{
staticClass::staticMethod();// LNK 2019 error
};

int main()
{
dev d;
d.printMsg();
}

Edited by TheOriginals, 22 February 2018 - 21:25.

#pragma once
#ifdef MATH_EXPORT
#define MATH_LIB_API __declspec(dllexport)
#else
#define MATH_LIB_API __declspec(dllimport)
#endif 
#include<iostream>
namespace math {
class MATH_LIB_API MathOperations
{
public:
  static double Add(double op1, double op2);
  static double Multiply(double op1, double op2);
  static double Substract(double op1, double op2);
};
class MATH_LIB_API staticTest {
public:
  static void test();
};
class external {
public:
  static void secTest();
};
}

#include<iostream>
#include"../MathDLL/MathLib.h"
#include"../ClassDllExport/MathOperations.h"
using namespace std;
int main()
{
cout << MathLibrary::MathLib::Add(2, 3) << endl;
cout << "class export : " << math::MathOperations::Multiply(2, 3) << endl;
cout << "class export : "; math::staticTest::test(); //daca invoc metoda asta singura de aici imi da eroare
math::external::secTest();
return 0;
}

namespace math {
double MathOperations::Add(double a, double 
{
  return a + b;
}
double MathOperations::Multiply(double a, double 
{
  return a * b;
}
double MathOperations::Substract(double a, double 
{
  return a - b;
}
void staticTest::test() {
  std::cout << "Hello from dll.";
}
void external::secTest() {
  std::cout << "test insde class outside dll";
}
}

Error LNK2019 unresolved external symbol "public: static void __cdecl math::external::secTest(void)" (?secTest@external@math@@SAXXZ) referenced in function _main AppDllImport
Error LNK1120 1 unresolved externals AppDllImport E:\testProjects\AppDllImport\Debug\AppDllImport.exe 1

 Cy_Cristian, on 23 februarie 2018 - 13:21, said:

#ifdef MATH_EXPORT
#define MATH_LIB_API __declspec(dllexport)
#else
#define MATH_LIB_API __declspec(dllimport)
#endif
#include<iostream>
namespace math {
class MATH_LIB_API base {
public:
virtual double Add(double op1, double op2);
};
class MATH_LIB_API MathOperations : public base
{
public:
double Add(double op1, double op2);
double Multiply(double op1, double op2);
double Substract(double op1, double op2);
};
}

int main()
{
math::MathOperations op;
op.Add(1,2);
return 0;
}

class ISDLConsole
{
public:
virtual void getInfo(int, int) = 0;
virtual void initConsole(char*, char*, int, int, int, int) = 0;
virtual void sendMsg(char*, int, int) = 0;
virtual void cls(int) = 0;
};
class SDLConsole : public ISDLConsole //daca adaug aici __declspec(dllexport) si sterg de mai jos iar nu mai face lnk
{
public:
void getInfo(int, int) { std::cout << "info"; }
void initConsole(char*, char*, int, int, int, int) {}
void sendMsg(char*, int, int) {}
void cls(int) {}
};
__declspec(dllexport) ISDLConsole *Create()
{
return new SDLConsole();
}

 Thefake_fake_fake, on 23 februarie 2018 - 14:03, said:

Edited by Cy_Cristian, 23 February 2018 - 15:08.