libPhonenumber (from Google) on iOS in a Kotlin Native project

I've been struggling to solve a problem.

I'm building a cross platform app (iOS and Android) using Kotlin Multiplatform (KMP) where I need a library from Google (

For Android, I can point to a Maven repo (

For iOS, I can use a ObjC port of libPhonenumber via Cocoapods.(

But, I can't use Kotlin's (cocoapod plugin) to properly recognize the Pod. The plugin appears to fail to build. Here's the details of my setup:

  1. Xcode v11.5
  2. IntelliJ IDEA v2020.1.2
  3. Cocoapods v1.9.1
  4. Gradle 6.0.1
  5. Sample repo ( NOTE: Within the repo, I'm using ./samples/cocoapods
  6. modify ./samples/cocoapods/kotlin-library/build.gradle.kts commented out AFNetworking, remove AFNetworking pod pod("AFNetworking", "~> 3.2.0") add a new pod pod("libPhoneNumber-iOS")
  7. modify ./samples/cocoapods/kotlin-library/ change this line: kotlin.native.home=../../../dist to this: #kotlin.native.home=../../../dist
  8. in Terminal in this folder: ./samples/cocoapods/kotlin-library/ ./gradlew podspec This creates a podspec file (libPhoneNumber-iOS.def) in ./samples/cocoapods/kotlin-library/build/cocoapods/defs/
  9. cd from kotlin-library to ios-app folder cd ../ios-app/
  10. Pod install using the command: pod install You'll see something like:
Downloading dependencies
Installing kotlin_library (1.0)
Installing libPhoneNumber-iOS (0.9.15)
Generating Pods project
Integrating client project
Pod installation complete! There is 1 dependency from the Podfile and 2 total pods installed.

When I build the sample 'ios-app' target: simulator in Xcode, I get the error: fatal error: module 'libPhoneNumber' not found

I have tried other libPhoneNumber pods, such as:

  • libPhoneNumberSwift
  • LTPhoneNumberField Both fail to build using Kotlin's cocoapods plugin, but work as a Pod without Kotlin's cocoapod plugin.

What am I missing?