How can I combine a static Rust library, low-level C FFI layer, and higher-level Swift bindings into a single binary framework bundle for iOS?

Question

I'm using UniFFI to generate Swift bindings for a Rust library.

Following the documentation, I have:

1. Compiled the Rust library:

• Once as a static library libuniffi_example.a for iOS devices (aarch64-apple-ios).
• Once as a fat static library libuniffi_example.a for the simulator (x86_64-apple-ios and aarch64-apple-ios-sim).

2. Generated the Swift bindings by running uniffi-bindgen generate src/example.udl --language swift. This outputs two things:

• A C header file exampleFFI.h declaring the low-level structs and functions for calling into Rust, along with a corresponding exampleFFI.modulemap to expose them to Swift.
• A Swift source file example.swift that imports the exampleFFI module and wraps it to provide the higher-level Swift API.

I've managed to build an XCFramework exposing the low-level C FFI layer defined in exampleFFI.h using:

xcodebuild -create-xcframework
    -library (...)/libuniffi_example.a -headers (...)/exampleFFI.h
    (...)

But when I use that XCFramework, I still need to include the generated example.swift source file in my project to access the higher-level Swift bindings.

Ideally, I'd like to create a single XCFramework that bundles everything necessary to access the Rust library via the generated higher-level Swift bindings directly.

I specifically don't want the consumers of the library to have to manually include anything else than the XCFramework and be able to access the higher-level Swift bindings as generated in the example.swift source file.