See https://bugs.gentoo.org/show_bug.cgi?id=269682#c5 and http://forums.gentoo.org/viewtopic-t-792329.html For details. Let profiles and make.conf handle the global useflags, please. Otherwise we just get dependency-spaghetti, especially when you use [svg=]
So you suggest IUSE="svg" instead of IUSE="+svg"? Alternatively cairo could have IUSE="+svg" :) .
(In reply to comment #1) > So you suggest IUSE="svg" instead of IUSE="+svg"? Yes
Fixed.