Xcode shows swift compiler errors when importing cocoapods generated by gradle plugin

Question

I am trying to use shared code in my iOS project from cocoapods that i created with cocoapods gradle plugin. Podspec is created without problems. My shared build.gradle:

plugins {
id("org.jetbrains.kotlin.multiplatform")
id("com.android.library")
id ("org.jetbrains.kotlin.native.cocoapods")

}

android {
  compileSdkVersion 29
  buildToolsVersion '30.0.0'

defaultConfig {
    minSdkVersion 19
    targetSdkVersion 29
    versionCode 1
    versionName "1.0"

    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    consumerProguardFiles 'consumer-rules.pro'
}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
}
}

version = "1.0"

kotlin {
ios()
android()

cocoapods {
    // Configure fields required by CocoaPods.
    summary = "Some description for a Kotlin/Native module"
    homepage = "Link to a Kotlin/Native module homepage"

    // The name of the produced framework can be changed.
    // The name of the Gradle project is used here by default.
    frameworkName = "toshlShared"
}

sourceSets {
commonMain.dependencies {
    api 'org.jetbrains.kotlin:kotlin-stdlib-common'
}

androidMain.dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    implementation "org.jetbrains.kotlin:kotlin-stdlib-common:$kotlin_version"
}

iosMain.dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-common:$kotlin_version"
}
}

}

When i run pod install all looks good, but when i run ios app i see this error:

EDIT: Added my project folder structure with my single .kt file (it is accessible from android code)

Answer 1

As far as I can see, the problem here is caused by the project structure. In the Gradle script, there are three targets declared: an Android one, and iosX64+iosArm64 shortcut(see details here) providing the other two. For this layout, there would be two compilations per iOS target(iosX64Main, iosX64Test, iosArm64Main, iosArm64Test) and

a compilation per Android build variant, for Android targets;

according to the documentation.
In this particular case, only source file SharedUtils.kt is being located in a directory located on an Android main compilation's source set. This means it does not get into any iOS compilation.
To make this source file shared, it should be relocated to the common code. There are two default source sets for common code in Kotlin Multiplatform: commonMain and commonTest. Therefore, source code should be placed under src/<sourceSetName>/kotlin directory(commonMain for this case).