compile error via SIOCGLIFCONF from ip.c on hpux-11

PostgreSQL 9 is breaking for me on line 654 of ip.c. ip.c is checking
on presence SIOCGLIFCONF to determine if it's ok to use linux method
of polling if addrs etc over ioctl, which is not enough. hpux provides
this method in similar fashion, but the structs are named different,
and have different members.

for example, we have:
struct if_laddrreq {
char iflr_name[IF_NAMESIZE]; /* if name, e.g. "lan0" */
union {
struct sockaddr_ext iflru_addr;
struct sockaddr_ext iflru_dstaddr;
int iflru_flags;
#if defined(__STDC_EXT__) || defined(__LP64__)
uint64_t iflru_xflags;
#endif
int iflru_metric;
struct iflife iflru_lifetimes;
caddr_t iflru_data;
unsigned char __iflru_padding[32]; /* alignment for 32/64bit*/
} iflr_iflru;

which is similar to
struct ifreq {
char ifr_name[IFNAMSIZ]; /* Interface name */
union {
struct sockaddr ifr_addr;
struct sockaddr ifr_dstaddr;
struct sockaddr ifr_broadaddr;
struct sockaddr ifr_netmask;
struct sockaddr ifr_hwaddr;
short ifr_flags;
int ifr_ifindex;
int ifr_metric;
int ifr_mtu;
struct ifmap ifr_map;
char ifr_slave[IFNAMSIZ];
char ifr_newname[IFNAMSIZ];
char * ifr_data;
};
};

(via http://unixhelp.ed.ac.uk/CGI/man-cgi?netdevice+7)

forcing the #if check of SIOCGLIFCONF to false allowed postgres to
continue and compile. Searching the archives turned up the
samehost/samenet patch...did that break this? was hpux checked, or is
this a version issue? (I'm testing on 11.23 Itanium).

merlin