I managed to get rid of some gtk/gnome related libraries and just in case ran revdep-rebuild... Checking dynamic linking consistency... broken /usr/lib/ImageMagick-6.3.4/modules-Q16/coders/svg.so (requires librsvg-2.so.2) broken /usr/lib/ImageMagick-6.3.4/modules-Q16/coders/svg.la (requires /usr/lib/librsvg-2.la) broken /usr/lib/ImageMagick-6.3.4/modules-Q16/coders/svg.la (requires /usr/lib/libcroco-0.6.la) So $(use_with svg rsvg) is needed. For dps and djvu configure flags isn't cared either.
It should be noted that imagemagick also has an internal svg implementation that is used as a fallback.
I'd add djvu use flag too. Please fix :) !
carlo: Couple months gone by without any reaction so if you have the time you could just fix this yourself.
fixed in media-gfx/imagemagick-6.3.7.8. Thanks for the report.