[Interest] creating a binary .rcc version of a series of Freedesktop icon themes linked through inheritance

[René J.V. Bertin]

Hi,

I'd like to create a single binary .rcc resource from a total of 4 Freedesktop icon themes that are linked through inheritance.
Merging the actual directories is straightforward, but creating a merged index.theme file isn't .

Does anyone know of a tool to assist in that part of the merge or is there rcc functionality I'm overlooking that allows a .rcc file to declare a dependency on another .rcc file, such that the application needs only register that single "toplevel" rcc file?

Thanks,
René