The rss-glx screensaver package includes a fireworks screensaver called skyrocket. At configure, it checks for the OpenAL sound library to enable audio effects in skyrocket. It should therefore have a local useflag and conditional dependency on media-libs/openal. /usr/portage/profiles/use.local.desc: +x11-misc/rss-glx:openal - Enables Open Audio Library support in rss-glx Skyrocket screensaver /usr/portage/x11-misc/rss-glx/rss-glx.0.7.6.ebuild: -IUSE="kde sse 3dnow" +IUSE="kde sse 3dnow openal" ... + openal? ( media-libs/openal )
added that feature to the current rss-glx.