Enable support for the cairo graphics library

Packages describing “cairo” as local USE flag

Package“cairo” Flag Description
dev-ruby/barbyAdd support for writing images (PNG, PS, EPS and, if supported, PDF and SVG) using dev-ruby/rcairo. Not available on JRuby.
sys-apps/ducBuild support for exporting to PNG and PDF with x11-libs/cairo
sys-apps/hwlocEnable the Cairo back-end of hwloc's lstopo command

All packages providing a “cairo” USE flag (22)