Add build parameters to enable JVM IR and disable native targets

Build with -Penable_jvm_ir enables JVM IR compiler
Build with -Pdisable_native_targets disables native targets

Author: ALikhachev

build.gradle

@@ -33,6 +33,8 @@ buildscript {
             throw new IllegalArgumentException("'kotlin_snapshot_version' should be defined when building with snapshot compiler")
         }
     }
+    ext.jvm_ir_enabled = rootProject.properties['enable_jvm_ir'] != null
+    ext.native_targets_enabled = rootProject.properties['disable_native_targets'] == null
 
     // Determine if any project dependency is using a snapshot version
     ext.using_snapshot_version = build_snapshot_train

gradle/compile-jvm-multiplatform.gradle

@@ -6,8 +6,12 @@ sourceCompatibility = 1.6
 targetCompatibility = 1.6
 
 kotlin {
-    targets {
-        fromPreset(presets.jvm, 'jvm')
+    jvm {
+        if (rootProject.ext.jvm_ir_enabled) {
+            compilations.all {
+                kotlinOptions.useIR = true
+            }
+        }
     }
     sourceSets {
         jvmTest.dependencies {

gradle/compile-jvm.gradle

@@ -9,6 +9,12 @@ apply plugin: 'org.jetbrains.kotlin.jvm'
 sourceCompatibility = 1.6
 targetCompatibility = 1.6
 
+if (rootProject.ext.jvm_ir_enabled) {
+    kotlin.target.compilations.all {
+        kotlinOptions.useIR = true
+    }
+}
+
 dependencies {
     testCompile "org.jetbrains.kotlin:kotlin-test:$kotlin_version"
     // Workaround to make addSuppressed work in tests

kotlinx-coroutines-core/build.gradle

@@ -5,8 +5,12 @@
 apply plugin: 'org.jetbrains.kotlin.multiplatform'
 apply from: rootProject.file("gradle/compile-jvm-multiplatform.gradle")
 apply from: rootProject.file("gradle/compile-common.gradle")
+
+if (rootProject.ext.native_targets_enabled) {
+    apply from: rootProject.file("gradle/compile-native-multiplatform.gradle")
+}
+
 apply from: rootProject.file("gradle/compile-js-multiplatform.gradle")
-apply from: rootProject.file("gradle/compile-native-multiplatform.gradle")
 apply from: rootProject.file('gradle/publish-npm-js.gradle')
 
 /* ==========================================================================
@@ -52,8 +56,11 @@ static boolean isNativeDarwin(String name) { return ["ios", "macos", "tvos", "wa
 static boolean isNativeOther(String name) { return ["linux", "mingw"].any { name.startsWith(it) } }
 
 defineSourceSet("concurrent", ["common"]) { it in ["jvm", "native"] }
-defineSourceSet("nativeDarwin", ["native"]) { isNativeDarwin(it) }
-defineSourceSet("nativeOther", ["native"]) { isNativeOther(it) }
+
+if (rootProject.ext.native_targets_enabled) {
+    defineSourceSet("nativeDarwin", ["native"]) { isNativeDarwin(it) }
+    defineSourceSet("nativeOther", ["native"]) { isNativeOther(it) }
+}
 
 /* ========================================================================== */
 
@@ -129,7 +136,7 @@ def configureNativeSourceSetPreset(name, preset) {
 }
 
 // :KLUDGE: Idea.active: Configure platform libraries for native source sets when working in IDEA
-if (Idea.active) {
+if (Idea.active && rootProject.ext.native_targets_enabled) {
     def manager = project.ext.hostManager
     def linuxPreset = kotlin.presets.linuxX64
     def macosPreset = kotlin.presets.macosX64