net-analyzer/rrdtool-1.4.5* build system contain automagic dependencies on sys-apps/tcp-wrappers ( libwrap.so library) Refernce - http://oss.oetiker.ch/rrdtool-trac/browser/tags/1.4.5/configure.ac#L517 How to reproduce: 1) Install sys-apps/tcp-wrappers 2) install net-analyzer/rrdtool 3) use lddtre to see depend library and grep in on libwrap
Fixed in 1.4.7.