Use udns as the DNS backend instead of evdns (libevent). Supports IPv4 only.

Packages describing “udns” as local USE flag

Package “udns” Flag Description
dev-db/pgbouncer Use udns as the DNS backend instead of evdns (libevent). Supports IPv4 only.
net-im/biboumi Asynchronously resolve domain names using net-libs/udns

All packages providing a “udns” USE flag (2)