ThomasHabets/libnet — comment on commit 17b2961daa3de67c9cf5380acd0ff7dae5035198
File: libnet/src/libnet_write.c line 384
By sam-github:

HAVE_IRIX_IPV6 is never defined, there is no autoconf test for it, and no substitution target in include/config.h.in... So I assume IRIX can never have IPv6 support?