[K/N][gradle] Supported friend modules for two stage compilation

Fixes https://youtrack.jetbrains.com/issue/KT-49248

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/native/tasks/KotlinNativeCompilerArgBuilder.kt

@@ -77,6 +77,7 @@ internal fun buildKotlinNativeBinaryLinkerArgs(
     target: KonanTarget,
     outputKind: CompilerOutputKind,
     libraries: List<File>,
+    friendModule: FileCollection,
 
     languageSettings: LanguageSettings,
     enableEndorsedLibs: Boolean,
@@ -111,6 +112,11 @@ internal fun buildKotlinNativeBinaryLinkerArgs(
 
     exportLibraries.forEach { add("-Xexport-library=${it.absolutePath}") }
     includeLibraries.forEach { add("-Xinclude=${it.absolutePath}") }
+
+    val friends = friendModule.files
+    if (friends.isNotEmpty()) {
+        addArg("-friend-modules", friends.joinToString(File.pathSeparator) { it.absolutePath })
+    }
 }
 
 private fun buildKotlinNativeMainArgs(

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/native/tasks/KotlinNativeTasks.kt

@@ -168,6 +168,11 @@ abstract class AbstractKotlinNativeCompile<T : KotlinCommonToolOptions, K : Kotl
         else objects.fileCollection()
     }
 
+    @get:Classpath
+    protected val friendModule: FileCollection by project.provider {
+        project.files(compilation.friendPaths)
+    }
+
     @Deprecated("For native tasks use 'libraries' instead", ReplaceWith("libraries"))
     override fun getClasspath(): FileCollection = libraries
     override fun setClasspath(configuration: FileCollection?) {
@@ -354,10 +359,6 @@ constructor(
     private val commonSourcesTree: FileTree
         get() = commonSources.asFileTree
 
-
-    private val friendModule: FileCollection by project.provider {
-        project.files(compilation.friendPaths)
-    }
     // endregion.
 
     // region Language settings imported from a SourceSet.
@@ -634,6 +635,7 @@ constructor(
             konanTarget,
             outputKind,
             libraries.files.filterKlibsPassedToCompiler(),
+            friendModule,
             languageSettings,
             enableEndorsedLibs,
             localKotlinOptions,