[Linux][XLib] Erreur compilation

Bonjour,
Pourriez vous me dire ce qui cloche dans mon programme ????SVP
Lorsque je compile sur linux il me dit qu'il y un problème avec XCopyArea Mais je ne voit pas ...


#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>

GC gc;
Display *display;
int screen,dest_x,dest_y;
Window wina, winb, root;
unsigned long white_pixel, black_pixel;
XSetWindowAttributes attrib;
unsigned long mask_attrib;
int largf,hautf;
Drawable fenetre,src,dest;
int x,y;
unsigned int larg,haut;

int prof;
Pixmap pix;
int i;

main() {
if ((display = XOpenDisplay ("")) == NULL) {
fprintf (stderr, "Can't open Display\n");
exit (1);
}

x=10;y=10;
larg=40;
haut=40;
largf=300;
hautf=300;
gc = DefaultGC (display, screen);
screen = DefaultScreen (display);
root = RootWindow (display, screen);
white_pixel = WhitePixel (display, screen);
black_pixel = BlackPixel (display, screen);
wina = XCreateSimpleWindow (display, root,
0, 0, largf, hautf, 5, black_pixel, white_pixel);


XSelectInput (display, wina, ButtonPressMask);
XStoreName (display, wina, "gravity_S");


prof = XDefaultDepth (display, screen);
pix = XCreatePixmap (display, root, 100, 40, prof);

XMapWindow (display, wina);

XSync (display, 0);
XCopyArea (display, winb, pix, gc, 0, 0, 100, 40, 0, 0);
XFillArc(display,winb,gc,i,y,larg,haut,0,360*64);

winb = XCreateSimpleWindow (display, root,
0, 0, largf, hautf, 5, black_pixel, white_pixel);
XSelectInput (display, winb, ButtonPressMask);
XStoreName (display, winb, "gravity_NW");
XMapWindow (display, winb);
attrib.bit_gravity = SouthWestGravity;
mask_attrib = CWBitGravity;
XChangeWindowAttributes(display, wina, mask_attrib, &attrib);
attrib.bit_gravity = SouthWestGravity;
XChangeWindowAttributes(display, winb, mask_attrib, &attrib);



for (;;) {
XEvent ev;
XNextEvent (display, &ev);
switch (ev.type) {
case ButtonPress :
// if (ev.xbutton.window==wina)
// {
//XClearWindow (display, wina);

XFillArc(display,winb,gc,x,y,larg,haut,0,360*64);

//if (ev.xbutton.window==winb)
// {

for (i=0;i<largf;i++){
XClearWindow (display, winb);
XFillArc(display,winb,gc,i,y,larg,haut,0,360*64);
//sleep(2);
XCopyArea (display, pix, winb, gc, 0, 0, 100, 40, i,y);
}
break;
default :
break;
}
}
}