[Gradle, K/N] Add user-defined variant attributes to framework artifact

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

@@ -165,6 +165,16 @@ open class KotlinNativeTargetConfigurator<T : KotlinNativeTarget>(
                         KotlinNativeTarget.konanBuildTypeAttribute,
                         binary.buildType.name
                     )
+                    // capture type parameter T
+                    fun <T> copyAttribute(key: Attribute<T>, from: AttributeContainer, to: AttributeContainer) {
+                        to.attribute(key, from.getAttribute(key)!!)
+                    }
+                    binary.target.getAttributes().keySet().forEach {
+                        copyAttribute(it, binary.target.getAttributes(), this.attributes)
+                    }
+                    binary.attributes.keySet().forEach {
+                        copyAttribute(it, binary.attributes, this.attributes)
+                    }
                 }
             }
         }

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

@@ -11,6 +11,9 @@ import org.gradle.api.Action
 import org.gradle.api.Named
 import org.gradle.api.Project
 import org.gradle.api.artifacts.Dependency
+import org.gradle.api.attributes.Attribute
+import org.gradle.api.attributes.AttributeContainer
+import org.gradle.api.attributes.HasAttributes
 import org.gradle.api.provider.Provider
 import org.gradle.api.tasks.AbstractExecTask
 import org.gradle.api.tasks.TaskProvider
@@ -229,7 +232,11 @@ class Framework(
     baseName: String,
     buildType: NativeBuildType,
     compilation: KotlinNativeCompilation
-) : AbstractNativeLibrary(name, baseName, buildType, compilation) {
+) : AbstractNativeLibrary(name, baseName, buildType, compilation), HasAttributes {
+
+    private val attributeContainer = HierarchyAttributeContainer(parent = null)
+
+    override fun getAttributes() = attributeContainer
 
     override val outputKind: NativeOutputKind
         get() = NativeOutputKind.FRAMEWORK