@Di4na@msw Centricular recently paid for librsvg to be ported from Autotools to Meson; they did a fantastic job. But the build scripts are not easy, even in Meson! It needs to do Special Stuff(tm) to call cargo and have everything work on Windows and MacOS.
It's mostly stupid glue. Cargo puts artifacts in one place; meson wants them in another. Meson knows the file extensions for libraries or binaries depending on the platform, but does not expose them, so the build scripts replicate them.