Created attachment 311075 [details, diff] cairo-epatch_user.diff x11-libs/cairo tends to be one of these pieces of software where custom patches are floating around. Hence it would be nice if it supported epatch_user so that one does not need to keep locally modified versions of the ebuild. Trivial patch attached :). Thanks.
This has been applied to cairo-1.10.2-r2 and cairo-1.12.2-r1