#include <math.h>
#include <stdlib.h>
#include <GL/gl.h>
-#include <GL/glut.h>
+/*#include <GL/glut.h>*/
#ifdef HAVE_GLE3
#include <GL/gle.h>
#else
#define NUM_PTS (25)
-double contour [NUM_PTS][2];
-double norms [NUM_PTS][2];
+static double contour [NUM_PTS][2];
+static double norms [NUM_PTS][2];
static void init_contour (void)
{