gentoo-overlay/app-misc/delay/files/delay-1.6-headers.patch

--- a/delay.c
+++ b/delay.c
@@ -17,6 +17,7 @@
 */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <time.h>
 #include <sys/time.h>
 #include <unistd.h>