This Gentoo overlay provides a librsvg fork with no rust dependencies.
(See https://github.com/oaken-source/librsvg-og for development)
DISCLAIMER: the development version/fork is stuck at 2.40.21, and the new ebuild at version 2.52.5 is merely to trick portage, in order to follow dependency requirements. Don't worry, your apps will still work.
Proof: evince reading a PDF running librsvg from this repository:
If you don't have app-portage/layman already installed, read this Gentoo wiki.
Once you're done, run the following command to add this repository:
layman -o https://raw.githubusercontent.com/saloniamatteo/librsvg-overlay/master/repositories.xml -f -a librsvg-overlay
You will receive a warning saying this repository is unofficial. Proceed, then run the following command, to sync the newly added repository, called librsvg-overlay:
layman -s librsvg-overlay
Ensure that, when you search librsvg with emerge -s gnome-base/librsvg::librsvg-overlay,
this is the result:
Now, you can run emerge -s gnome-base/librsvg::librsvg-overlay to install librsvg from this overlay.