#ifndef TIME_H
#define TIME_H
-#if 1
+#ifndef __TIME_UNSIGNED
+#define __TIME_UNSIGNED 1
+#endif
+
+#if __TIME_UNSIGNED
struct tm
{
unsigned char tm_sec; /* Seconds. [0-60] */
char *asctime(struct tm *timeptr);
char *ctime(time_t *timep);
-#endif TIME_H
+#endif /* TIME_H */