He says make it an extension property.

Interop/StubGenerator/src/main/kotlin/org/jetbrains/kotlin/native/interop/gen/jvm/ToolConfig.kt

@@ -19,7 +19,7 @@ package  org.jetbrains.kotlin.native.interop.tool
 import org.jetbrains.kotlin.konan.file.*
 import org.jetbrains.kotlin.konan.properties.*
 import org.jetbrains.kotlin.konan.target.*
-import org.jetbrains.kotlin.konan.util.DependencyProcessor
+import org.jetbrains.kotlin.konan.util.*
 import kotlin.reflect.KFunction
 
 class ToolConfig(userProvidedTargetName: String?, userProvidedKonanProperties: String?, runnerProvidedKonanHome: String) {

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanConfig.kt

@@ -31,7 +31,7 @@ import org.jetbrains.kotlin.descriptors.impl.ModuleDescriptorImpl
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.konan.file.File
 import org.jetbrains.kotlin.konan.target.*
-import org.jetbrains.kotlin.konan.util.DependencyProcessor
+import org.jetbrains.kotlin.konan.util.*
 import org.jetbrains.kotlin.storage.LockBasedStorageManager
 import org.jetbrains.kotlin.storage.StorageManager
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanPhases.kt

@@ -17,13 +17,13 @@
 package org.jetbrains.kotlin.backend.konan
 
 import org.jetbrains.kotlin.backend.konan.util.*
-import org.jetbrains.kotlin.konan.util.VisibleNamed
+import org.jetbrains.kotlin.konan.util.*
 import org.jetbrains.kotlin.konan.target.CompilerOutputKind
 
 enum class KonanPhase(val description: String,
                       vararg prerequisite: KonanPhase,
                       var enabled: Boolean = true,
-                      var verbose: Boolean = false) : VisibleNamed {
+                      var verbose: Boolean = false) {
     /* */ FRONTEND("Frontend builds AST"),
     /* */ PSI_TO_IR("Psi to IR conversion"),
     /* */ SERIALIZER("Serialize descriptor tree and inline IR bodies"),

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/library/KonanLibrary.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.backend.konan.library
 
 import org.jetbrains.kotlin.konan.target.KonanTarget
 import org.jetbrains.kotlin.konan.file.File
+import org.jetbrains.kotlin.konan.util.visibleName
 
 // This scheme describes the Konan Library (klib) layout.
 interface KonanLibraryLayout {

build.gradle

@@ -17,6 +17,7 @@ import groovy.io.FileType
 import org.jetbrains.kotlin.konan.target.*
 import org.jetbrains.kotlin.konan.properties.*
 import org.jetbrains.kotlin.konan.util.*
+import static org.jetbrains.kotlin.konan.util.VisibleNamedKt.*
 
 defaultTasks 'clean', 'dist'
 
@@ -65,7 +66,7 @@ allprojects {
 
 void setupHostAndTarget() {
     ext.hostName = TargetManager.hostName
-    ext.targetList = TargetManager.enabled*.visibleName as List
+    ext.targetList = TargetManager.enabled.collect { getVisibleName(it) } as List
 }
 
 void setupClang(Project project) {
@@ -337,7 +338,7 @@ private ArrayList<DefFile> targetDefFiles(String target) {
 }
 
 private String targetToPlatform(String target) {
-    new TargetManager(target).target.family.visibleName
+    getVisibleName(new TargetManager(target).target.family)
 }
 
 private String targetToOs(String target) {

buildSrc/plugins/src/main/groovy/org/jetbrains/kotlin/KonanTest.groovy

@@ -22,6 +22,7 @@ import org.gradle.api.tasks.TaskAction
 import org.gradle.process.ExecResult
 import org.jetbrains.kotlin.konan.target.*
 import org.jetbrains.kotlin.konan.properties.*
+import static org.jetbrains.kotlin.konan.util.VisibleNamedKt.*
 
 import java.util.regex.Pattern
 
@@ -109,7 +110,7 @@ abstract class KonanTest extends JavaExec {
                     *moreArgs,
                     *project.globalTestArgs]
             if (project.testTarget) {
-                args "-target", target.visibleName
+                args "-target", getVisibleName(target)
             }
             if (enableKonanAssertions) {
                 args "-ea"
@@ -447,7 +448,7 @@ class RunDriverKonanTest extends KonanTest {
                     *moreArgs,
                     *project.globalTestArgs]
             if (project.testTarget) {
-                args "-target", target.visibleName
+                args "-target", getVisibleName(target)
             }
             if (enableKonanAssertions) {
                 args "-ea"
@@ -469,7 +470,7 @@ class RunInteropKonanTest extends KonanTest {
     void setInterop(String value) {
         this.interop = value
         this.interopConf = project.kotlinNativeInterop[value]
-        this.interopConf.target = target.visibleName
+        this.interopConf.target = getVisibleName(target)
         this.dependsOn(this.interopConf.genTask)
     }
 

buildSrc/plugins/src/main/groovy/org/jetbrains/kotlin/NativeInteropPlugin.groovy

@@ -29,6 +29,8 @@ import org.gradle.api.tasks.SourceSet
 import org.gradle.api.tasks.TaskDependency
 import org.gradle.internal.reflect.Instantiator
 import org.jetbrains.kotlin.konan.target.*
+import org.jetbrains.kotlin.konan.util.*
+import static org.jetbrains.kotlin.konan.util.VisibleNamedKt.*
 
 class NamedNativeInteropConfig implements Named {
 
@@ -146,7 +148,7 @@ class NamedNativeInteropConfig implements Named {
     }
 
     File getNativeLibsDir() {
-        def target = new TargetManager(target).target.visibleName
+        def target = getVisibleName(new TargetManager(target).target)
         return new File(project.buildDir, "nativelibs/$target")
     }
 

dependencies/build.gradle

@@ -22,6 +22,7 @@ import groovy.transform.stc.FromString
 import org.jetbrains.kotlin.konan.target.*
 import org.jetbrains.kotlin.konan.util.DependencyProcessor
 import static org.jetbrains.kotlin.konan.target.KonanTarget.*
+import static org.jetbrains.kotlin.konan.util.VisibleNamedKt.*
 import org.jetbrains.kotlin.konan.properties.KonanProperties
 import org.jetbrains.kotlin.konan.properties.*
 
@@ -218,7 +219,7 @@ enum DependencyKind {
     DependencyKind(String name,
             @ClosureParams(value = FromString.class, options = "KonanProperties") Closure<String> dirGetter,
             @ClosureParams(value = FromString.class, options = "KonanTarget") Closure<String> propertyNameGetter =
-                           {target -> "${target.visibleName}${name.capitalize()}Dir"}) {
+                           {target -> "${getVisibleName(target)}${name.capitalize()}Dir"}) {
         this.name = name
         this.dirGetter = dirGetter
         this.propertyNameGetter = propertyNameGetter

shared/src/main/kotlin/org/jetbrains/kotlin/konan/VisibleNamed.kt

@@ -16,9 +16,4 @@
 
 package org.jetbrains.kotlin.konan.util
 
-// This interface is good for Enums to make enum members available to users
-// as low case words.
-interface VisibleNamed {
-    val name: String
-    val visibleName get() = name.toLowerCase() 
-}
+val <T : Enum<T>> T.visibleName get() = name.toLowerCase() 

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

@@ -16,9 +16,9 @@
 
 package org.jetbrains.kotlin.konan.target
 
-import org.jetbrains.kotlin.konan.util.VisibleNamed
+import org.jetbrains.kotlin.konan.util.visibleName
 
-enum class Family(val exeSuffix:String, val dynamicPrefix: String, val dynamicSuffix: String) : VisibleNamed {
+enum class Family(val exeSuffix:String, val dynamicPrefix: String, val dynamicSuffix: String) {
     OSX     ("kexe", "lib", "dylib"),
     IOS     ("kexe", "lib", "dylib"),
     LINUX   ("kexe", "lib", "so"   ),
@@ -27,7 +27,7 @@ enum class Family(val exeSuffix:String, val dynamicPrefix: String, val dynamicSu
     WASM    ("wasm", ""   , "wasm" )
 }
 
-enum class Architecture(val bitness: Int) : VisibleNamed {
+enum class Architecture(val bitness: Int) {
     X64(64),
     ARM64(64),
     ARM32(32),
@@ -36,7 +36,7 @@ enum class Architecture(val bitness: Int) : VisibleNamed {
     WASM32(32);
 }
 
-enum class KonanTarget(val family: Family, val architecture: Architecture, val detailedName: String, var enabled: Boolean = false) : VisibleNamed {
+enum class KonanTarget(val family: Family, val architecture: Architecture, val detailedName: String, var enabled: Boolean = false) {
     ANDROID_ARM32(  Family.ANDROID,     Architecture.ARM32,     "android_arm32"),
     ANDROID_ARM64(  Family.ANDROID,     Architecture.ARM64,     "android_arm64"),
     IPHONE(         Family.IOS,         Architecture.ARM64,     "ios"),
@@ -53,7 +53,7 @@ enum class KonanTarget(val family: Family, val architecture: Architecture, val d
 fun hostTargetSuffix(host: KonanTarget, target: KonanTarget) =
     if (target == host) host.detailedName else "${host.detailedName}-${target.detailedName}"
 
-enum class CompilerOutputKind: VisibleNamed {
+enum class CompilerOutputKind {
     PROGRAM {
         override fun suffix(target: KonanTarget?) = ".${target!!.family.exeSuffix}"
     },

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanBuildingConfig.kt

@@ -29,6 +29,7 @@ import org.gradle.util.ConfigureUtil
 import org.jetbrains.kotlin.gradle.plugin.tasks.KonanBuildingTask
 import org.jetbrains.kotlin.konan.target.KonanTarget
 import org.jetbrains.kotlin.konan.target.TargetManager
+import org.jetbrains.kotlin.konan.util.visibleName
 import java.io.File
 
 /** Base class for all Kotlin/Native artifacts. */

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanLibrariesSpec.kt

@@ -25,6 +25,7 @@ import org.gradle.api.tasks.Internal
 import org.jetbrains.kotlin.gradle.plugin.tasks.KonanArtifactWithLibrariesTask
 import org.jetbrains.kotlin.gradle.plugin.tasks.KonanBuildingTask
 import org.jetbrains.kotlin.konan.target.KonanTarget
+import org.jetbrains.kotlin.konan.util.visibleName
 import java.io.File
 
 open class KonanLibrariesSpec(val task: KonanArtifactWithLibrariesTask, val project: Project) {

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanPlugin.kt

@@ -25,6 +25,7 @@ import org.jetbrains.kotlin.gradle.plugin.KonanPlugin.Companion.COMPILE_ALL_TASK
 import org.jetbrains.kotlin.gradle.plugin.tasks.*
 import org.jetbrains.kotlin.konan.target.KonanTarget
 import org.jetbrains.kotlin.konan.target.TargetManager
+import org.jetbrains.kotlin.konan.util.visibleName
 import java.io.File
 import java.util.*
 import javax.inject.Inject

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanToolingModelBuilder.kt

@@ -20,6 +20,7 @@ import org.gradle.api.Project
 import org.gradle.tooling.provider.model.ToolingModelBuilder
 import org.jetbrains.kotlin.gradle.plugin.model.KonanArtifact
 import org.jetbrains.kotlin.gradle.plugin.model.KonanModel
+import org.jetbrains.kotlin.konan.util.visibleName
 
 object KonanToolingModelBuilder : ToolingModelBuilder {
     override fun canBuild(modelName: String): Boolean = KonanModel::class.java.name == modelName

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/tasks/KonanBaseTasks.kt

@@ -30,6 +30,7 @@ import org.jetbrains.kotlin.gradle.plugin.KonanArtifactWithLibrariesSpec
 import org.jetbrains.kotlin.gradle.plugin.KonanLibrariesSpec
 import org.jetbrains.kotlin.konan.target.KonanTarget
 import org.jetbrains.kotlin.konan.target.TargetManager
+import org.jetbrains.kotlin.konan.util.visibleName
 import java.io.File
 
 internal val Project.host

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/tasks/KonanCompileTask.kt

@@ -20,6 +20,7 @@ import org.gradle.api.file.FileCollection
 import org.gradle.api.tasks.*
 import org.jetbrains.kotlin.gradle.plugin.*
 import org.jetbrains.kotlin.konan.target.CompilerOutputKind
+import org.jetbrains.kotlin.konan.util.visibleName
 
 enum class Produce(val cliOption: String, val kind: CompilerOutputKind) {
     PROGRAM("program", CompilerOutputKind.PROGRAM),

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/tasks/KonanCompilerDownloadTask.kt

@@ -21,8 +21,7 @@ import org.gradle.api.GradleScriptException
 import org.gradle.api.tasks.Internal
 import org.gradle.api.tasks.TaskAction
 import org.jetbrains.kotlin.gradle.plugin.*
-import org.jetbrains.kotlin.konan.util.DependencyProcessor
-import org.jetbrains.kotlin.konan.util.DependencySource
+import org.jetbrains.kotlin.konan.util.*
 import java.io.File
 import java.io.IOException
 

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/tasks/KonanInteropTask.kt

@@ -24,6 +24,7 @@ import org.gradle.util.ConfigureUtil
 import org.jetbrains.kotlin.gradle.plugin.*
 import org.jetbrains.kotlin.gradle.plugin.KonanInteropSpec.IncludeDirectoriesSpec
 import org.jetbrains.kotlin.konan.target.KonanTarget
+import org.jetbrains.kotlin.konan.util.visibleName
 import java.io.File
 
 /**

tools/kotlin-native-gradle-plugin/src/test/groovy/org/jetbrains/kotlin/gradle/plugin/test/KonanProject.groovy

@@ -24,7 +24,7 @@ class KonanProject {
     static String DEFAULT_ARTIFACT_NAME = 'main'
     static String DEFAULT_INTEROP_NAME = "stdio"
 
-    static String HOST = TargetManager.host.visibleName
+    static String HOST = TargetManager.hostName
 
     File projectDir
     Path projectPath