diff -u ping_991020.orig/Makefile ping_991020/Makefile
--- ping_991020.orig/Makefile	Fri Aug 28 02:01:55 1998
+++ ping_991020/Makefile	Wed Jun  7 12:57:24 2000
@@ -19,30 +19,30 @@
 # ----------------------------------------------------------------------
 
 #if defined(_AIX)
-SYSDEFS = -D_BSD -D_BSD_INCLUDES -U__STR__ -DBIT_ZERO_ON_LEFT
+#SYSDEFS = -D_BSD -D_BSD_INCLUDES -U__STR__ -DBIT_ZERO_ON_LEFT
 #endif
  
 #if defined(SCO) && You have either OpenDeskTop 3 or OpenServer 5
-SYSDEFS = -DSYSV
+#SYSDEFS = -DSYSV
 #endif
  
 #if defined(solaris) && You do not want to use BSD compatibility mode
-SYSDEFS = -DSYSV
+#SYSDEFS = -DSYSV
 #endif
  
 #if defined(solaris) && You are using its default broken resolver library
-SYSDEFS = -DNO_YP_LOOKUP
+#SYSDEFS = -DNO_YP_LOOKUP
 #endif
 
 #if defined(linux) && The IP checksum is now ip_sum and no longer ip_csum
-SYSDEFS = -DLINUX_IPSUM
+#SYSDEFS = -DLINUX_IPSUM
 #endif
 
 #if defined(linux) && You have the real BSD netinet header files (GLIBC)
-SYSDEFS = -D_BSD_SOURCE
+#SYSDEFS = -D_BSD_SOURCE
 #endif
 
-SYSDEFS =
+SYSDEFS = -DLINUX_IPSUM
 
 # ----------------------------------------------------------------------
 # Configuration definitions.
@@ -50,22 +50,22 @@
 # ----------------------------------------------------------------------
 
 #if defined(BIND_49) && __res_state is still shipped as struct state
-CONFIGDEFS = -DOLD_RES_STATE
+#CONFIGDEFS = -DOLD_RES_STATE
 #endif
 
 # If this is a SUN with SunOS 4.1.x and you have an NC400 ethernet board
-CONFIGDEFS = -DOMNINET='"ne0"'
+#CONFIGDEFS = -DOMNINET='"ne0"'
 
 # If combined use of IPOPT_LSRR and IPOPT_RR doesn't *hang* your router
-CONFIGDEFS = -DMULTIPLE_IP_OPTIONS
+#CONFIGDEFS = -DMULTIPLE_IP_OPTIONS
 
 # If sendto() accepts a different maximum size for atomic packets
-CONFIGDEFS = -DMAXPKT=8192
+#CONFIGDEFS = -DMAXPKT=8192
 
 # If special ping modes should be restricted only to the superuser
-CONFIGDEFS = -DRESTRICT_PINGMODES
+#CONFIGDEFS = -DRESTRICT_PINGMODES
 
-CONFIGDEFS =
+CONFIGDEFS = -DMULTIPLE_IP_OPTIONS -DMAXPKT=65535
 
 # ----------------------------------------------------------------------
 # Include file directories.
@@ -89,7 +89,7 @@
 DEFS = $(CONFIGDEFS) $(SYSDEFS) $(INCLUDES)
 
 COPTS =
-COPTS = -O
+COPTS = -O3
 
 CFLAGS = $(COPTS) $(DEFS)
 
@@ -97,7 +97,7 @@
 CC = /usr/ucb/cc			#if defined(solaris) && BSD
 CC = /bin/cc -arch m68k -arch i386	#if defined(next)
 CC = /bin/cc
-CC = cc
+CC = gcc
 
 # ----------------------------------------------------------------------
 # Linking definitions.
diff -u ping_991020.orig/linux.h ping_991020/linux.h
--- ping_991020.orig/linux.h	Wed Aug 26 03:18:45 1998
+++ ping_991020/linux.h	Wed May 17 21:38:34 2000
@@ -86,13 +86,13 @@
 #define n_long  u_int			/* redefine for 64-bit machines */
 #define n_time  u_int			/* redefine for 64-bit machines */
 
-struct icmp {
-	u_char	icmp_type;		/* type of message, see below */
-	u_char	icmp_code;		/* type sub code */
-	u_short	icmp_cksum;		/* ones complement cksum of struct */
+/* struct icmp {
+	u_char	icmp_type;		
+	u_char	icmp_code;		
+	u_short	icmp_cksum;		
 	union {
-		u_char ih_pptr;			/* ICMP_PARAMPROB */
-		struct in_addr ih_gwaddr;	/* ICMP_REDIRECT */
+		u_char ih_pptr;		
+		struct in_addr ih_gwaddr; 
 		struct ih_idseq {
 			n_short	icd_id;
 			n_short	icd_seq;
@@ -112,7 +112,6 @@
 		} id_ts;
 		struct id_ip  {
 			struct ip idi_ip;
-			/* options and then 64 bits of data */
 		} id_ip;
 		n_long	id_mask;
 		char	id_data[1];
@@ -123,7 +122,7 @@
 #define	icmp_ip		icmp_dun.id_ip.idi_ip
 #define	icmp_mask	icmp_dun.id_mask
 #define	icmp_data	icmp_dun.id_data
-};
+}; */
 
 #define	ICMP_MINLEN	8		/* abs minimum */
 
@@ -170,10 +169,10 @@
  * Definitions needed for the tcp header structure.
  */
 
-#if 0
+
 #define th_sport	source
 #define th_dport	dest
-#endif
+
 
 /*
  * Some IP options have different names as well.