Horrible Error: LNK2019

[EpicAll Rounder]

Hey. I have a real problem. I am making a small 2D game and am trying to set up the SDL, but when i try compile it, these horrible error appears:

Error 2 error LNK2019: unresolved external symbol __imp__glClear@4 referenced in function "private: void __thiscall stellar::drawGame(void)" (?drawGame@stellar@@AAEXXZ)

Error 3 error LNK2019: unresolved external symbol __imp__glClearColor@16 referenced in function "private: void __thiscall stellar::initSystems(void)" (?initSystems@stellar@@AAEXXZ)

Error 4 error LNK2019: unresolved external symbol __imp__glClearDepth@8 referenced in function "private: void __thiscall stellar::drawGame(void)" (?drawGame@stellar@@AAEXXZ)

Error 5 error LNK1120: 3 unresolved externals

Please solve this!


Here's the code:

stellar.h

#pragma once
#include <SDL.h>
#include <glew.h>
enum class GameState { PLAY, EXIT };




class stellar
{
public:
stellar::stellar();
stellar::~stellar();
void run();



private:
SDL_Window* _window;
int _screenWidth;
int _screenHeight;
void initSystems();
void processInput();
void gameloop();
void drawGame();
GameState _gameState;

};






stellar.cpp

#include "stellar.h"
#include <glew.h>
#include <iostream>

#include <string>

void fatalError(std::string errorString) {
std::cout << errorString << std::endl;
std::cout << "Enter any key to Quit...";
int tmp;
std::cin >> tmp;
SDL_Quit();
}

stellar::stellar()
{
_window = nullptr;
_screenWidth = 1024;
_screenHeight = 710;
_gameState = GameState::PLAY;
}


stellar::~stellar()
{
}


void stellar::run() {
initSystems();

gameloop();
}

void stellar::initSystems(){
SDL_Init(SDL_INIT_EVERYTHING);
_window = SDL_CreateWindow("Stellar Explorer 2(D)", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, _screenWidth, _screenHeight, SDL_WINDOW_OPENGL);
if (_window == nullptr){ fatalError("SDL_Window could not be created!"); }

SDL_GLContext glContext = SDL_GL_CreateContext(_window);
if (glContext == nullptr){ fatalError("SDL_GL context could not be created!"); }





SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);

glClearColor(0.0f, 0.0f, 1.0f, 1.0f);






}

void stellar::gameloop(){
while (_gameState != GameState::EXIT){
processInput();



stellar::drawGame();




}
}
void stellar::processInput() {
SDL_Event evnt;

while (SDL_PollEvent(&evnt)){
switch (evnt.type) {
case SDL_QUIT:
_gameState = GameState::EXIT;
break;
case SDL_MOUSEMOTION:
std::cout << evnt.motion.x << " " << evnt.motion.y << std::endl;
break;
}
}
}







void stellar::drawGame(){
glClearDepth(1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);




SDL_GL_SwapWindow(_window);

}




main.cpp

#include "stellar.h"
#include <iostream>


int main(int argc, char** argv) {
stellar Stellar;
Stellar.run();
return 0;
}


PLEASE HELP

[firedraco]

Sounds you like you are linking SDL and your project correctly. Go double check you set up that stuff right.

[S G H]

You forgot to link to opengl32, or you're using GCC and need to reorder the libraries.