Hello!

Our current version of librsvg is officially unmaintained, and the
latest version requires Rust.

I've succeeded in making the latest version build, but there are a
couple of problems.

* Module dependency cycle: <https://bugs.gnu.org/31392>.
* librsvg requires Cairo 1.15, which is not a "stable" release branch.
* It bundles 59 Rust libraries.

Here are the Rust libs:

aho-corasick/                bitflags/
bitflags-0.9.1/              cairo-rs/
cairo-sys-rs/                cssparser/
cssparser-macros/            c_vec/
downcast-rs/                 dtoa/
dtoa-short/                  either/
float-cmp/                   fuchsia-zircon/
fuchsia-zircon-sys/          glib/
glib-sys/                    gobject-sys/
itertools/                   itoa/
lazy_static/                 libc/
matches/                     memchr/
num-traits/                  pango/
pangocairo/                  pangocairo-sys/
pango-sys/                   phf/
phf_codegen/                 phf_generator/
phf_shared/                  pkg-config/
procedural-masquerade/       proc-macro2/
quote/                       quote-0.3.15/
rand/                        rand-0.3.22/
regex/                       regex-syntax/
siphasher/                   smallvec/
syn/                         syn-0.11.11/
synom/                       thread_local/
ucd-util/                    unicode-xid/
unicode-xid-0.0.4/           unreachable/
utf8-ranges/                 void/
winapi/                      winapi-0.2.8/
winapi-i686-pc-windows-gnu/  winapi-x86_64-pc-windows-gnu/

Have anyone packaged any of these?  Or made a Rust importer?

Here is a package definition for librsvg (use with guix package -f).