[SDL]Jeu de serpent, probleme de compilation

Bonjour

Je debute en programmation, j'ai telechargé un code qui est cencé etre un jeu de serpent avec SDL.
Voici le code:

#include "snakeh.h"


void putapple();
void puttext(SDL_Surface **surface, char *text, int size, int r, int g, int b);
void setrect(SDL_Rect *rect, int x, int y, int w, int h);

SDL_Event event;

SDL_Color textcolor;
TTF_Font *font;

SDL_Surface *tfps, *tpause, *tscore, *tgameover, *screen, *sprite1, *grass, *back, *apple;
SDL_Rect rtmp;
Mix_Chunk *s;
Uint32 colorkey;

int dx = 1;
int dy = 0;
int score = 0;
int fps = 0;
int startticks, startticksf;

char gticks = 0;
char gticksf = 0;
char cfps[100];
char cscore[100];
char m = 0;
char pause = 1;
char gameover = 0;


struct point
{
int x;
int y;
};
struct point snake[1000];
struct point p;
struct point papple;
int lsnake = 4;

int main(int argc, char **argv)
{
int j,i;
int loop = 1;
for(j = 0 ; j < lsnake; j++)
{
snake[j].x = 10 + lsnake - j;
snake[j].y = 5;
}
p = snake[0];
if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO)!=0)
{
printf("Initialisation impossible!!!");
return 1;
}
TTF_Init();
SDL_WM_SetCaption("WORM SDL", NULL);
screen = SDL_SetVideoMode(WIDTH, HEIGHT, BPP, SDL_DOUBLEBUF | SDL_HWSURFACE);

Mix_OpenAudio(22050, MIX_DEFAULT_FORMAT, 2, 4096);
s = Mix_LoadWAV("poua.wav");
if(s == NULL)
{
printf("!!");
return 1;
}
sprite1 = SDL_LoadBMP("BMP/ball.bmp");
apple = SDL_LoadBMP("BMP/apple.bmp");
grass = SDL_LoadBMP("BMP/grass.bmp");
colorkey = SDL_MapRGB(screen->format, 255, 255, 255);
SDL_SetColorKey(sprite1, SDL_SRCCOLORKEY, colorkey);
SDL_SetColorKey(apple, SDL_SRCCOLORKEY, colorkey);
back = SDL_AllocSurface(SDL_HWSURFACE, WIDTH, HEIGHT, BPP, 0, 0, 0, 0);
puttext(&tpause, "Press Space", 90, 255, 255, 255);
puttext(&tfps, "0 fps", 16, 160, 0, 0);
puttext(&tscore, "Score : 0", 22, 0, 0, 0);
puttext(&tgameover, "GAME OVER", 90, 255, 60, 60);
for(i = 0; i < 40; i++)
{
for(j = 0; j < 30; j++)
{
setrect(&rtmp, i * 20, j * 20, 0, 0);
SDL_BlitSurface(grass, NULL, back, &rtmp);
}
}
setrect(&rtmp, 0, 0, 800, 40);
SDL_FillRect(back, &rtmp, SDL_MapRGB(screen->format, 100, 100, 255));
if(screen==NULL) loop = 0;
putapple();
while(loop)
{
while(SDL_PollEvent(&event))
{
switch(event.type)
{
case SDL_QUIT:
loop = 0;
break;
case SDL_KEYDOWN:
if(event.key.keysym.sym == SDLK_q) loop = 0;
if(event.key.keysym.sym == SDLK_DOWN)
{
if(!m)
{
dx = 0;
dy = 1;
}
}
if(event.key.keysym.sym == SDLK_UP)
{
if(!m)
{
dx = 0;
dy = -1;
}
}
if(event.key.keysym.sym == SDLK_RIGHT)
{
if(m)
{
dx = 1;
dy = 0;
}
}
if(event.key.keysym.sym == SDLK_LEFT)
{
if(m)
{
dx = -1;
dy = 0;
}
}
if(event.key.keysym.sym == SDLK_SPACE)
{
pause = 1 - pause;
if(!pause && gameover)
{
score = 0;
gameover = 0;
sprintf(cscore, "Score : %d", score);
puttext(&tscore, cscore, 22, 0, 0, 0);
lsnake = 4;
for(j = 0 ; j < lsnake; j++)
{
snake[j].x = 10 + lsnake - j;
snake[j].y = 5;
}
p = snake[0];
dx = 1;
dy = 0;
}
}
break;
default:
break;
}
}

if(!gticks)
{
startticks = SDL_GetTicks();
gticks = 1;
}
if((SDL_GetTicks() - startticks) >= 50)
{
if(!pause && !gameover)
{

p.x += dx;
p.y += dy;
if((p.x == papple.x) && (p.y == papple.y))
{
snake[lsnake] = snake[lsnake-1];
snake[lsnake+1] = snake[lsnake-1];
lsnake += 2;
score++;
sprintf(cscore, "Score : %d", score);
puttext(&tscore, cscore, 22, 0, 0, 0);
Mix_PlayChannel(-1, s, 0);
putapple();
}
m = (!dx);
for (j = lsnake ; j > 0; j--) snake[j] = snake[j-1];
if(p.x < 0) p.x = 39;
if(p.x > 39) p.x = 0;
if(p.y < 0) p.y = 27;
if(p.y > 27) p.y = 0;
snake[0] = p;
for(j = 1; j <= lsnake; j++) if((snake[0].x == snake[j].x) && (snake[0].y ==snake[j].y)) gameover = 1;
gticks = 0;
}
SDL_BlitSurface(back, NULL, screen, NULL);
setrect(&rtmp, papple.x * 20, papple.y * 20 + 40, 0, 0);
SDL_BlitSurface(apple, NULL, screen, &rtmp);
for(j = 0; j < lsnake; j++)
{
setrect(&rtmp, snake[j].x * 20, snake[j].y * 20 + 40, 0, 0);
SDL_BlitSurface(sprite1, NULL, screen, &rtmp);
}
}
fps++;
if(gticksf == 0)
{
startticksf = SDL_GetTicks();
gticksf = 1;
}
if(SDL_GetTicks() - startticksf >= 1000)
{
gticksf = 0;
sprintf(cfps, "%d fps", fps);
puttext(&tfps, cfps, 16, 160, 0, 0);
fps = 0;
}
if(pause)
{
setrect(&rtmp, 120, 180, 0, 0);
SDL_BlitSurface(tpause, NULL, screen, &rtmp);
}
if(gameover)
{
setrect(&rtmp, 130, 300, 0, 0);
SDL_BlitSurface(tgameover, NULL, screen, &rtmp);
pause = 1;
}
setrect(&rtmp, 700, 10, 0, 0);
SDL_BlitSurface(tfps, NULL, screen, &rtmp);
setrect(&rtmp, 30, 10, 0, 0);
SDL_BlitSurface(tscore, NULL, screen, &rtmp);
SDL_Flip(screen);
}
SDL_Quit();
return 0;
}
void putapple()
{
int i;
char b = 0;
char c = 0;
while(!c)
{
b = 0;
papple.x = (int)(rand() / (RAND_MAX / 39));
papple.y = (int)(rand() / (RAND_MAX / 27));
for(i = 0; (i < lsnake) && !b; i++)
{
if((snake[i].x == papple.x) && (snake[i].y == papple.y))b = 1;
}
if(!b) c = 1;
}
}
void puttext(SDL_Surface **surface, char *text, int size, int r, int g, int b)
{
textcolor.r = r;
textcolor.g = g;
textcolor.b = b;
font = TTF_OpenFont("Roman.ttf", size);
SDL_FreeSurface(*surface);
*surface = TTF_RenderText_Solid(font, text, textcolor);
TTF_CloseFont(font);
}

void setrect(SDL_Rect *rect, int x, int y, int w, int h)
{
rect->x = x;
rect->y = y;
rect->w = w;
rect->h = h;
}

Quand j'essaie de le compiler j'ai ses messages d'erreurs:

[Linker error] undefined reference to `TTF_Init'
[Linker error] undefined reference to `Mix_OpenAudio'
[Linker error] undefined reference to `Mix_LoadWAV_RW'
[Linker error] undefined reference to `Mix_PlayChannelTimed'
[Linker error] undefined reference to `TTF_OpenFont'
[Linker error] undefined reference to `TTF_RenderText_Solid'
[Linker error] undefined reference to `TTF_CloseFont'
ld returned 1 exit status
C:\Dev-Cpp\Makefile.win [Build Error] [snake.exe] Error 1

S'il vous plait, est ce que quelqu'un peut me dire d'ou vient le probleme?

Merci