All, I want to add a "memcached" USE flag to mail-filters/rmilter. Before doing so, I looked if there was a global USE flag. There is not, but I though see usage across 14 packages:
dev-db/pgpool2[memcached]: Use memcached for query caching dev-php/pecl-mysqlnd_qc[memcached]: Use <pkg>dev-libs/libmemcached</pkg> as a storage handler mail-filter/opendkim[memcached]: Add support for using <pkg>dev-libs/libmemcached</pkg> mail-mta/postfix[memcached]: Add support for using <pkg>net-misc/memcached</pkg> for lookup tables net-analyzer/graphite-web[memcached]: Enable memcached support net-analyzer/munin[memcached]: Install the packages required for memcached monitoring. net-mail/automx[memcached]: Enable memcached support sys-auth/keystone[memcached]: Installs dependencies needed for using memcached as a backend sys-cluster/cinder[memcached]: Installs the memcached server sys-cluster/gearmand[memcache]: Support memcache daemon (via <pkg>dev-libs/libmemcached</pkg>) for the queue storage. sys-cluster/nova[memcached]: Installs the memcached server sys-cluster/swift[memcached]: adds memcached support www-servers/lighttpd[memcache]: Enable memcache support for mod_cml and mod_trigger_b4_dl Most of these seem to depend on dev-libs/libmemcached or net-misc/memcached, with a few packages depending on language-specific stuff (e.g. dev-perl/Cache-Memcached or dev-python/python-memcached). I suppose the description can just be "Enable memcached support". Any objections? Cheers, Dirkjan