http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52645
--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2012-03-21 15:04:51 UTC --- > IPPROTO_IPV6 and IPV6_MULTICAST_IF are not defined in any system header > on HP-UX 11.00. As far as I can tell, there is no IPv6 support. Ok, but at least struct sockaddr_in6 is present in/from <netinet/in.h>, otherwise the HAVE_INET6 configure test would fail? > On HP-UX 11.11, the defines are in netinet/in6.h. Ok, thanks. Rainer