> On OS X 10.6.8, I don't have netinet/ip6.h, and I don't see the struct defined in any other file (in particular, in none of the .h files in netinet or netinet6) Can you try the `topic/jsiwek/ipv6-configure-checks` branch in `bro` and `cmake` repos and tell me what errors you still get, if any? Also, do you have a <netinet/icmp6.h> ? +Jon