implemented in next version of pkgng
Ports declare things like: “I provide an http server” or “I need a web server with php”
Allow ports to depend on either libjpeg or libjpegturbo, on perl > 5.12, etc
Jonathan raises the issue of C++ libraries with/without RTTI
Flavors suggested as a solution, but not clear everything required is supported
Forcing rpaths or adding per-port /usr/local/etc/libmap.d (coming to HEAD soon) or similar