> Is the "getifaddrs()" you're using part of QNX4, or is it > from some add-on library, e.g. taking the eCos implementation > and porting it to QNX4?
"getifaddrs()" is not part of QNX4. There is no connection whatsoever. It is utilized in the libpcap file, 'fad-getad.c'. This source file is called out explicity in libpcap 0.8.3's configure-generated Makefile as: FSRC = fad-getad.c I am absolutely dumb-founded that the maintainers of libpcap would have this code, and thereby _assume_ that the supporting file(s) would already exist on the developer's computer! #include <ifaddrs.h> ... if (getifaddrs (&ifap) !=0) { Its almost unbelievable! - This is the tcpdump-workers list. Visit https://lists.sandelman.ca/ to unsubscribe.