I am preparing the 2.46.0 librsvg release. This will no longer have the rsvg-view-3 program.
History of rsvg-view
as a 71-line C program to aid development of librsvg. It would just
render an SVG file to a pixbuf, stick that pixbuf in a
widget, and show a window with that.
Over time, it slowly acquired most of the command-line options that
rsvg-convert supports. And I suppose, as a way of testing the
Cairo-ification of librsvg, it also got the ability to print SVG files
GtkPrintContext. At last count, it was a 784-line C program
that is not really the best code in the world.
What makes rsvg-view awkward?
Rsvg-view requires GTK. But GTK requires librsvg, indirectly, through gdk-pixbuf! There is not a hard circular dependency because GTK goes, "gdk-pixbuf, load me this SVG file" without knowing how it will be loaded. In turn, gdk-pixbuf initializes the SVG loader provided by librsvg, and that loader reads/renders the SVG file.
Ideally librsvg would only depend on gdk-pixbuf, so it would be able to provide the SVG loader.
The rsvg-view source code still has a few calls to GTK functions which are now deprecated. The program emits GTK warnings during normal use.
Rsvg-view is... not a very good SVG viewer. It doesn't even start up
with the window scaled properly to the SVG's dimensions! If used for
quick testing during development, it cannot even aid in viewing the
transparent background regions which the SVG does not cover. It just
sticks a lousy custom widget inside a
GtkScrolledWindow, and does
not have the conventional niceties to view images like zooming with
the scroll wheel.
EOG is a much better SVG viewer than rsvg-view, and people actually invest effort in making it pleasant to use.
Removal of rsvg-view
So, the next version of librsvg will not provide the
binary. Please update your packages accordingly. Distros may be able to
move the compilation of librsvg to a more sensible place in the
platform stack, now that it doesn't depend on GTK being available.
What can you use instead? Any other image viewer. EOG works fine; there are dozens of other good viewers, too.