Support experimental targets. (#2681)

shared/src/main/kotlin/org/jetbrains/kotlin/konan/target/Distribution.kt

@@ -39,6 +39,9 @@ class Distribution(
     val konanHome = findKonanHome()
     val konanSubdir = "$konanHome/konan"
     val mainPropertyFileName = "$konanSubdir/konan.properties"
+    val experimentalEnabled by lazy {
+        File("$konanSubdir/experimentalTargetsEnabled").exists
+    }
 
     private fun propertyFilesFromConfigDir(configDir: String, genericName: String): List<File> {
         val directory = File(configDir, "platforms/$genericName")

shared/src/main/kotlin/org/jetbrains/kotlin/konan/target/KonanTarget.kt

@@ -127,7 +127,7 @@ private class TargetManagerImpl(val userRequest: String?, val hostManager: HostM
     override val targetSuffix get() = target.name
 }
 
-open class HostManager(protected val distribution: Distribution = Distribution()) {
+open class HostManager(protected val distribution: Distribution = Distribution(), experimental: Boolean = false) {
 
     fun targetManager(userRequest: String? = null): TargetManager = TargetManagerImpl(userRequest, this)
 
@@ -142,6 +142,8 @@ open class HostManager(protected val distribution: Distribution = Distribution()
 
     private val zephyrSubtargets = distribution.availableSubTarget("zephyr").map { ZEPHYR(it) }
 
+    private val experimentalEnabled = experimental || distribution.experimentalEnabled
+
     private val configurableSubtargets = zephyrSubtargets
 
     val targetValues: List<KonanTarget> by lazy {
@@ -171,7 +173,7 @@ open class HostManager(protected val distribution: Distribution = Distribution()
         return target
     }
 
-    val enabled: List<KonanTarget> by lazy { 
+    val enabledRegular: List<KonanTarget> by lazy {
             when (host) {
                 KonanTarget.LINUX_X64 -> listOf(
                     KonanTarget.LINUX_X64,
@@ -181,7 +183,7 @@ open class HostManager(protected val distribution: Distribution = Distribution()
                     KonanTarget.ANDROID_ARM32,
                     KonanTarget.ANDROID_ARM64,
                     KonanTarget.WASM32
-                ) + zephyrSubtargets
+                )
                 KonanTarget.MINGW_X64 -> listOf(
                     KonanTarget.MINGW_X64,
                     KonanTarget.MINGW_X86,
@@ -191,7 +193,7 @@ open class HostManager(protected val distribution: Distribution = Distribution()
                     // TODO: toolchain to be fixed for that to work.
                     // KonanTarget.ANDROID_ARM64,
                     KonanTarget.WASM32
-                ) + zephyrSubtargets
+                )
                 KonanTarget.MACOS_X64 -> listOf(
                     KonanTarget.MACOS_X64,
                     KonanTarget.IOS_ARM32,
@@ -202,12 +204,29 @@ open class HostManager(protected val distribution: Distribution = Distribution()
                     KonanTarget.ANDROID_ARM32,
                     KonanTarget.ANDROID_ARM64,
                     KonanTarget.WASM32
-                ) + zephyrSubtargets
+                )
                 else ->
                     throw TargetSupportException("Unknown host platform: $host")
             }        
     }
 
+    val enabledExperimental: List<KonanTarget> by lazy {
+        when (host) {
+            KonanTarget.LINUX_X64 -> listOf(
+                    KonanTarget.MINGW_X86, KonanTarget.MINGW_X64
+            ) + zephyrSubtargets
+            KonanTarget.MACOS_X64 -> listOf(
+                    KonanTarget.MINGW_X86, KonanTarget.MINGW_X64
+            ) + zephyrSubtargets
+            KonanTarget.MINGW_X64 -> listOf<KonanTarget>(
+            ) + zephyrSubtargets
+            else -> throw TargetSupportException("Unknown host platform: $host")
+        }
+    }
+
+    val enabled : List<KonanTarget>
+        get() = if (experimentalEnabled) enabledRegular + enabledExperimental else enabledRegular
+
     fun isEnabled(target: KonanTarget) = enabled.contains(target)
 
     companion object {

shared/src/main/kotlin/org/jetbrains/kotlin/konan/target/Linker.kt

@@ -303,7 +303,10 @@ open class MingwLinker(targetProperties: MingwConfigurables)
             return staticGnuArCommands(ar, executable, objectFiles, libraries)
 
         val dynamic = kind == LinkerOutputKind.DYNAMIC_LIBRARY
-        return listOf(Command(linker).apply {
+        return return listOf(when {
+                HostManager.hostIsMingw -> Command(linker)
+                else -> Command("wine64", "$linker.exe")
+        }.apply {
             +listOf("-o", executable)
             +objectFiles
             if (optimize) +linkerOptimizationFlags

shared/src/main/kotlin/org/jetbrains/kotlin/konan/target/Platform.kt

@@ -29,7 +29,8 @@ class Platform(val configurables: Configurables)
     }
 }
 
-class PlatformManager(distribution: Distribution = Distribution()) : HostManager(distribution) {
+class PlatformManager(distribution: Distribution = Distribution(), experimental: Boolean = false) :
+        HostManager(distribution, experimental) {
 
     private val loaders = enabled.map {
         it to loadConfigurables(it, distribution.properties, DependencyProcessor.defaultDependenciesRoot.absolutePath)