I've installed the latest versions of libpcap and libdnet. There is however a problem with daq. I configured snort with --wth-daq-libraries=/usr/local/lib/daq and --with-libpcap-libraries=/usr/lib ...
I compiled a package for Solaris 11 Express that has some library dependencies, which I also compiled from source and installed in the usual /usr/local. (And Solaris doesn't even have /usr/local ...