For example, /usr/portage/net-im/twinkle/twinkle-0.8.1.ebuild RDEPEND=">=net-libs/ccrtp-1.3.4 >=dev-cpp/commoncpp2-1.4.1 $(qt_min_version 3.3.0) arts? ( kde-base/arts ) media-libs/libsndfile media-libs/speex dev-libs/boost speex? ( media-libs/speex ) ilbc? ( dev-libs/ilbc-rfc3951 )" Speex appears absolutely, then a second time conditional on the use flag.
opps. fixed. thanks for telling me.