Apple Mach-O link (Id) Error in Xcode 5 C ++ sdl2 framework

Question

I seriously think I might have checked every mach-o link id error post on stackOverFlow and couldn't find a solution to my problem... I dont fully understand how the linker works yet so I can't always figure out how to fix these bugs when they come up...

Ive been following these YT tutorials some guy named Konrad Jablonski put up about making rpg games with C++ [using SDL2 and SDL.image framworks]... I learned a lot about rpg game logic -- it was definitely a good learning experience for someone with a firm grasp of the basics, but new to c++...

At this point in the tutorials he's seperating one class into numerous subclasses... And everything was working fine until I started breaking up the one class into numerous different .cpp and .h files... The error message says:

- Undefined symbols for architecture x86_64:

- "cSprite::draw()", referenced from:

- gMain::gameLoop() in gMain.o

*- ld: symbol(s) not found for architecture x86_64*

- clang: error: linker command failed with exit code 1 (use -v to see invocation)

The whole project was bug free up until compilation, and I don't fully understand how the compiler works so I don't know where to start when attempting to adjust it... I can put up the classes if anyone knows anything about these type of errors and wants to help -- If not I'd still appreciate anything that would lead me in the right direction as far as figuring out how the linker works... Im still new to stackoverflow so I won't be able to +1 responses until I get more active but when I get the chance I'll return the favor

-------- gMain.cpp ---------

#include <iostream>
#include "stdafx.h"
#include "gMain.h"


using namespace std;

gMain::gMain(int passed_screenWidth, int passed_screenHeight)
{
    screenWidth = passed_screenWidth;
    screenHeight = passed_screenHeight;

    // quit boolean
    quit = false;

    // create instance of cSDL class
    csdl_setup = new cSDL_Setup(&quit, screenWidth, screenHeight);

    grass = new cSprite(csdl_setup->getRenderer(), "data/images.jpeg", 0, 0, screenWidth, screenHeight);

    bruce_Lee = new cSprite(csdl_setup->getRenderer(), "/Users/jamesbryant/Desktop/gamee/gamee/lee.bmp", 300, 250, 50, 100);


}

gMain::~gMain(void)
{
}

void gMain::gameLoop(void)
{
    // game loop logic
    while (!quit && csdl_setup->getMainEvent() ->type != SDL_QUIT)
    {
        csdl_setup->begin();

        grass->draw();
        bruce_Lee->draw();


        csdl_setup->end();

    }
}

------ gMain.h ------

#ifndef __game__gMain__
#define __game__gMain__
#pragma once

//#include <iostream>
//#include <SDL2/SDL.h>
//#include <SDL2_image/SDL_image.h>
//#include <SDL2/SDL_audio.h>
#include "cSDL_Setup.h"
#include "cSprite.h"

using namespace std;

class gMain
{
public:
    gMain(int passed_screenWidth, int passed_screenHeight);
    ~gMain(void);
    void gameLoop();

private:
    int screenWidth;
    int screenHeight;

    bool quit;

    //cSprite
    class cSprite* grass;

    class cSprite* bruce_Lee;


    // cSDL_Setup class object
    class cSDL_Setup* csdl_setup;
};

#endif /* defined(__game__gMain__) */

----- cSprite.cpp -------

#include "stdafx.h"
#include "cSprite.h"
//#include "gMain.h"
//#include <SDL2/SDL_main.h>
//#include <SDL2/SDL.h>
//#include "cSDL_Setup.h"

using namespace std;

void draw(SDL_Renderer, SDL_Texture, SDL_Rect);

cSprite::cSprite(SDL_Renderer* passed_renderer, string filePath, int x, int y, int w, int h)
{
    renderer = passed_renderer;

    //... image
    image = NULL;
    image = IMG_LoadTexture(renderer,filePath.c_str());

    // image error message
    if (image == NULL)
    {
        cout<<"Couldnt load image..."<<filePath.c_str()<<endl;
    }

    //image dimensions
    rect->x = x;
    rect->y = y;
    rect->w = w;
    rect->h = h;
};

cSprite::~cSprite(void)
{
    SDL_DestroyTexture(image);
}

//get methods
//SDL_Rect* cSprite::getRect()
//{
//    return rect;
//}

//get methods
//SDL_Texture* cSprite::getImage()
//{
//    return image;
//}

void cSprite::draw()
{
    SDL_RenderCopy(renderer, image, NULL, rect);
}

------- cSprite.h --------

#ifndef __game__cSprite__
#define __game__cSprite__
#pragma once

#include <iostream>
#include <SDL2/SDL_main.h>
#include <SDL2/SDL.h>

using namespace std;


class cSprite
{
public:
    cSprite(SDL_Renderer* passed_renderer, string filePath, int x, int y, int w, int h);
    ~cSprite(void);

    void draw();

private:
    SDL_Texture* image;
    SDL_Rect* rect;

    SDL_Renderer* renderer;
};

#endif /* defined(__game__cSprite__) */

------ cSDL_Setup.cpp -------

#include "stdafx.h"
#include "cSDL_Setup.h"
//#include "gMain.h"

using namespace std;

cSDL_Setup::cSDL_Setup(bool* quit, int screenWidth, int screenHeight)
{
    // create window
    window = NULL;
    window = SDL_CreateWindow("rWDY_pWDR", 100, 100, screenWidth, screenHeight, SDL_WINDOW_RESIZABLE);

    // if window couldnt be created...
    if (window == NULL)
    {
        cout<<"Window couldnt be created..."<<endl;

        *quit = true;
        //exit(0);
    }

    //create renderer
    renderer = NULL;
    renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);

    // initialize images
    mainEvent = new SDL_Event();

}

cSDL_Setup::~cSDL_Setup(void)
{
    SDL_DestroyWindow(window);
    SDL_DestroyRenderer(renderer);
    delete mainEvent;
}

//get methods
SDL_Renderer* cSDL_Setup::getRenderer()
{
    return renderer;
}

SDL_Event* cSDL_Setup::getMainEvent()
{
    return mainEvent;
}

void cSDL_Setup::begin()
{
    SDL_PollEvent(mainEvent);
    SDL_RenderClear(renderer);
}

void cSDL_Setup::end()
{
    SDL_RenderPresent(renderer);

}

------- cSDL_Setup.h -------

#ifndef __game__cSDL_Setup__
#define __game__cSDL_Setup__
#pragma once


//#include <iostream>
//#include "gMain.h"

using namespace std;

class cSDL_Setup
{
public:
    cSDL_Setup(bool* quit, int screenWidth, int screenHeight); // 1 parameter(s): 'quit'
    ~cSDL_Setup(void);

    // 'get' functions
    SDL_Renderer* getRenderer();
    SDL_Event* getMainEvent();

    void begin();
    void end();

private:
    SDL_Window* window;
    SDL_Renderer* renderer;
    SDL_Event* mainEvent;

};

#endif /* defined(__game__cSDL_Setup__) */

-------- stdafx.h ---------

#ifndef gamee_stdafx_h
#define gamee_stdafx_h
#pragma once

#include <iostream>
#include <SDL2/SDL.h>
#include <SDL2_image/SDL_image.h>
#include <SDL2_mixer/SDL_mixer.h>



#endif