--- ./hping2.h.xiugai	2021-08-03 10:41:08.601438036 +0800
+++ ./hping2.h	2021-08-03 10:44:28.575662672 +0800
@@ -357,7 +357,7 @@
	int status;
 };

-volatile struct delaytable_element delaytable[TABLESIZE];
+extern volatile struct delaytable_element delaytable[TABLESIZE];

 /* protos */
 void	nop(void);				/* nop */