Shape extension is built-in and mandatory.

Xext/panoramiXprocs.c

@@ -595,9 +595,7 @@ int PanoramiXTranslateCoords(ClientPtr client)
     }
     pWin = pDst->firstChild;
     while (pWin) {
-#ifdef SHAPE
 	    BoxRec  box;
-#endif
 	    if ((pWin->mapped) &&
 		(x >= pWin->drawable.x - wBorderWidth (pWin)) &&
 		(x < pWin->drawable.x + (int)pWin->drawable.width +
@@ -605,7 +603,6 @@ int PanoramiXTranslateCoords(ClientPtr client)
 		(y >= pWin->drawable.y - wBorderWidth (pWin)) &&
 		(y < pWin->drawable.y + (int)pWin->drawable.height +
 		 wBorderWidth (pWin))
-#ifdef SHAPE
 		/* When a window is shaped, a further check
 		 * is made to see if the point is inside
 		 * borderSize
@@ -615,7 +612,6 @@ int PanoramiXTranslateCoords(ClientPtr client)
 					wBoundingShape(pWin), 
 					x - pWin->drawable.x, 
 					y - pWin->drawable.y, &box))
-#endif
 		)
             {
 		rep.child = pWin->drawable.id;