title: SDL2 window does not show on raspbian
body: <p>My SDL2 window does not show. I am using a command line gcc compiler. 
  Here is my code:</p>
  
  <pre><code>#include "SDL2/SDL.h"
  #include &lt;stdio.h&gt;
  #include &lt;stdlib.h&gt;
  
  int main(){
      SDL_Window* screen;
      SDL_Init(SDL_INIT_EVERYTHING);
      atexit(SDL_Quit);
      screen = SDL_CreateWindow("Quiz Game", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 400, 400, SDL_WINDOW_RESIZABLE);
      SDL_Delay(10000);
      SDL_DestroyWindow(screen);  
      return 0;
  }
  </code></pre>
  
  <p>What am I doing wrong?</p>
  
  <p>note: The program works on debian.</p>