include/net-snmp/system/ultrix4.h - vendor/opensource/netsnmp - Git at Google

 #include <net-snmp/system/generic.h>
 #include <sys/types.h>

 typedef int     ssize_t;

 #undef TCP_TTL_SYMBOL
 #define TCP_TTL_SYMBOL "tcp_ttl"

 #undef RTTABLES_SYMBOL
	#include <net-snmp/system/generic.h>
	#include <sys/types.h>

	typedef int ssize_t;

	#undef TCP_TTL_SYMBOL
	#define TCP_TTL_SYMBOL "tcp_ttl"

	#undef RTTABLES_SYMBOL