since this dir contains shared libraries such as sasldb that can be linked with other application, the system must have a way to find them at runtime. So i suggest to add something like: echo "LDPATH=/usr/lib/sasl2" > ??cyrus-sasl doenvd ??cyrus-sasl to src_install section of the ebuild.
It is my understanding that apps should link to libsasl2 rather than to the other libraries. So it is safe to have just libsasl2 visible in LDPATH to avoid major breakages with apps linking to the other libs. I'm closing this as ->INVALID since I don't consider it a bug, however, I might be totally wrong here, so please reopen if you feel like. Cheers, Ferdy