#ifndef on all header files

client/reveng/getopt.h

@@ -20,6 +20,11 @@
     Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
 
+#ifndef __GETOPT_H
+#define __GETOPT_H
+
 extern char *optarg;
 extern int optind, opterr, optopt, pos;
 int getopt(int argc, char *argv[], const char *optstring);
+
+#endif