Missing iOS bindings when building framework for macOS and iOS

[pronebird]

Consider that we have a lib with conditional compilation:

#[cfg(target_os = "ios")]
pub mod ios_module;

#[cfg(target_os = "macos")]
pub mod mac_module;

Now building a framework with:

cargo swift package --accept-all --platforms mac ios --name MyLib --xcframework-name MyLibUniffi --lib-type dynamic

• Only outputs bindings for macOS
• Builds dylib even for iOS!!!

Instead --platforms should be replaced with:

--platform <SINGLE_PLATFORM>

followed by:

--lib-type <THIS_PLATFORM_LIB_TYPE>

In such case it should be possible to build a framework that offers dylib for macOS, and static lib for iOS.

cargo swift package --accept-all --platform mac --lib-type dynamic --platform ios --lib-type static --name MyLib --xcframework-name MyLibUniffi

Swift bindings for iOS and macOS should be included conditionally.

Relevant issue: mozilla/uniffi-rs#2647