Hi, I’m trying to build iOS project of my MPP but it fails with this error ``` > Task :app:cinter...

# multiplatform

[o.semen]

Hi, I’m trying to build iOS project of my MPP but it fails with this error

> Task :app:cinteropFirebaseIos UP-TO-DATE
> Task :app:linkDebugFrameworkIos
Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_FIRDatabase", referenced from:
      objc-class-ref in combined.o
ld: symbol(s) not found for architecture x86_64
e: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld invocation reported errors

> Task :app:linkDebugFrameworkIos FAILED

[ilya.matveev]

Do you use the CocoaPods plugin?

[o.semen]

do you mean gradle plugin? no.
I specified cocopods in podfile

[o.semen]

did not know it exists. reading docs

[o.semen]

trying to setup cocopods plugin but it fails

[o.semen]

here is my cocopods section

cocoapods {
        // Configure fields required by CocoaPods.
        summary = "Some description for a Kotlin/Native module"
        homepage = "Link to a Kotlin/Native module homepage"
        pod ("Firebase")
        pod ("Firebase/Core")
        pod ("Firebase/Database")
    }

[o.semen]

and here is my podfile

# Uncomment the next line to define a global platform for your project
platform :ios, '9.0'

target 'app' do
  # Uncomment the next line if you're using Swift or would like to use dynamic frameworks
  use_frameworks!

  # Pods for app

end

target 'iosApp' do
  # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
  use_frameworks!

  # Pods for iosApp
  pod 'Firebase'
  pod 'Firebase/Core'
  pod 'Firebase/Database'
  pod 'app', :path => '../app'

  target 'iosAppTests' do
    inherit! :search_paths
    # Pods for testing
  end

end

[o.semen]

import cocopods.*
does does not work for som reason

[o.semen]

unresolved reference cocopods

[o.semen]

@ilya.matveev do you have any idea ?

[o.semen]

might it be related to the fact it does not support subspecs ?

[Mohammadsss1]

Subspecs are not supported in the Cocoapods plugin for MPP

[ilya.matveev]

This thread should help to workaround the issue: https://kotlinlang.slack.com/archives/C3SGXARS6/p1556475587073500