Building file that has other files referenced

Question

I have three files, there called glfw3.h glfw3native.h and main.cpp.

File structure:

Game:
  Dependencies:
    include:
      glfw3.h
      glfw3native.h
    src:
      main.cpp

The first two have thousands of lines of code in so I wont post them. main.cp#include <GLFW/glfw3.h> main.cpp has this in it:

#include <GLFW/glfw3.h>

int main(void)
{
    GLFWwindow* window;

    /* Initialize the library */
    if (!glfwInit())
        return -1;

    /* Create a windowed mode window and its OpenGL context */
    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        return -1;
    }

    /* Make the window's context current */
    glfwMakeContextCurrent(window);

    /* Loop until the user closes the window */
    while (!glfwWindowShouldClose(window))
    {
        /* Render here */
        glClear(GL_COLOR_BUFFER_BIT);

        /* Swap front and back buffers */
        glfwSwapBuffers(window);

        /* Poll for and process events */
        glfwPollEvents();
    }

    glfwTerminate();
    return 0;
}

When I try to build main.cpp I get this:

/usr/bin/ld: /tmp/ccLgWsQA.o: in function `main':
main.cpp:(.text+0xd): undefined reference to `glfwInit'
/usr/bin/ld: main.cpp:(.text+0x44): undefined reference to `glfwCreateWindow'
/usr/bin/ld: main.cpp:(.text+0x54): undefined reference to `glfwTerminate'
/usr/bin/ld: main.cpp:(.text+0x67): undefined reference to `glfwMakeContextCurrent'
/usr/bin/ld: main.cpp:(.text+0x73): undefined reference to `glClear'
/usr/bin/ld: main.cpp:(.text+0x7f): undefined reference to `glfwSwapBuffers'
/usr/bin/ld: main.cpp:(.text+0x84): undefined reference to `glfwPollEvents'
/usr/bin/ld: main.cpp:(.text+0x90): undefined reference to `glfwWindowShouldClose'
/usr/bin/ld: main.cpp:(.text+0x9e): undefined reference to `glfwTerminate'
collect2: error: ld returned 1 exit status

I dont know how to reference them in main.cpp.