Make Xcode utils nullable for non Apple hosts.

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

@@ -671,8 +671,12 @@ class KotlinNativeTargetWithSimulatorTestsConfigurator :
         super.configureTestTask(target, testTask)
 
         val deviceIdProvider = testTask.project.provider {
-            Xcode.getDefaultTestDeviceId(target.konanTarget)
-                ?: error("Xcode does not support simulator tests for ${target.konanTarget.name}. Check that requested SDK is installed.")
+            if (Xcode != null) {
+                Xcode.getDefaultTestDeviceId(target.konanTarget)
+                    ?: error("Xcode does not support simulator tests for ${target.konanTarget.name}. Check that requested SDK is installed.")
+            } else {
+                error("Xcode is not found.")
+            }
         }
         testTask.device.set(deviceIdProvider)
     }

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

@@ -280,7 +280,10 @@ class Framework(
      * Embed bitcode for the framework or not. See [BitcodeEmbeddingMode].
      */
     val embedBitcodeMode = project.objects.property(org.jetbrains.kotlin.gradle.plugin.mpp.BitcodeEmbeddingMode::class.java).apply {
-        convention(project.provider { Xcode.defaultBitcodeEmbeddingMode(konanTarget, buildType) })
+        convention(project.provider {
+            Xcode?.defaultBitcodeEmbeddingMode(konanTarget, buildType)
+                ?: org.jetbrains.kotlin.gradle.plugin.mpp.BitcodeEmbeddingMode.DISABLE
+        })
     }
 
     @Deprecated("Use 'embedBitcodeMode' property instead.")

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/tasks/artifact/KotlinNativeFramework.kt

@@ -125,7 +125,7 @@ internal fun KotlinNativeArtifact.registerLinkFrameworkTask(
         task.staticFramework.set(isStatic)
         if (embedBitcode != null) {
             task.embedBitcode.set(embedBitcode)
-        } else {
+        } else if (Xcode != null) {
             task.embedBitcode.set(project.provider { Xcode.defaultBitcodeEmbeddingMode(target, buildType) })
         }
         task.libraries.setFrom(project.configurations.getByName(librariesConfigurationName))

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/utils/Xcode.kt

@@ -11,10 +11,22 @@ import org.jetbrains.kotlin.konan.target.Architecture.ARM32
 import org.jetbrains.kotlin.konan.target.Architecture.ARM64
 import org.jetbrains.kotlin.konan.target.Family
 import org.jetbrains.kotlin.konan.target.Family.*
+import org.jetbrains.kotlin.konan.target.HostManager
 import org.jetbrains.kotlin.konan.target.KonanTarget
 import org.jetbrains.kotlin.util.capitalizeDecapitalize.toUpperCaseAsciiOnly
 
-internal object Xcode {
+
+internal val Xcode = XcodeUtils()
+
+internal class XcodeUtils private constructor() {
+
+    companion object {
+        private val current: XcodeUtils? =
+            if (HostManager.hostIsMac) XcodeUtils() else null
+
+        operator fun invoke() = current
+    }
+
     val currentVersion: String by lazy {
         val out = runCommand(listOf("/usr/bin/xcrun", "xcodebuild", "-version"))
         out.lines()[0].removePrefix("Xcode ")