[Gradle, Native, IT] Allow checking compiler classpath

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/native/GeneralNativeIT.kt

@@ -987,6 +987,7 @@ class GeneralNativeIT : BaseGradleIT() {
         }
 
         private enum class NativeToolSettingsKind(val title: String) {
+            COMPILER_CLASSPATH("Classpath"),
             COMMAND_LINE_ARGUMENTS("Arguments"),
             CUSTOM_ENV_VARIABLES("Custom ENV variables")
         }
@@ -1025,6 +1026,9 @@ class GeneralNativeIT : BaseGradleIT() {
         fun CompiledProject.extractNativeCommandLineArguments(taskPath: String? = null, toolName: String): List<String> =
             extractNativeToolSettings(toolName, taskPath, NativeToolSettingsKind.COMMAND_LINE_ARGUMENTS).toList()
 
+        fun CompiledProject.extractNativeCompilerClasspath(taskPath: String? = null, toolName: String): List<String> =
+            extractNativeToolSettings(toolName, taskPath, NativeToolSettingsKind.COMPILER_CLASSPATH).toList()
+
         fun CompiledProject.extractNativeCustomEnvironment(taskPath: String? = null, toolName: String): Map<String, String> =
             extractNativeToolSettings(toolName, taskPath, NativeToolSettingsKind.CUSTOM_ENV_VARIABLES).map {
                 val (key, value) = it.split("=")
@@ -1036,6 +1040,12 @@ class GeneralNativeIT : BaseGradleIT() {
             toolName: String = "konanc",
             check: (List<String>) -> Unit
         ) = taskPaths.forEach { taskPath -> check(extractNativeCommandLineArguments(taskPath, toolName)) }
+
+        fun CompiledProject.checkNativeCompilerClasspath(
+            vararg taskPaths: String,
+            toolName: String = "konanc",
+            check: (List<String>) -> Unit
+        ) = taskPaths.forEach { taskPath -> check(extractNativeCompilerClasspath(taskPath, toolName)) }
         
         fun CompiledProject.checkNativeCustomEnvironment(
             vararg taskPaths: String,

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/compilerRunner/KotlinToolRunner.kt

@@ -116,7 +116,7 @@ internal abstract class KotlinToolRunner(
         project.logger.info(
             """|Run in-process tool "$displayName"
                |Entry point method = $mainClass.$daemonEntryPoint
-               |Classpath = ${classpath.joinToString(File.pathSeparator) { it.absolutePath }}
+               |Classpath = ${classpath.map { it.absolutePath }.toPrettyString()}
                |Arguments = ${args.toPrettyString()}
                |Transformed arguments = ${if (transformedArgs == args) "same as arguments" else transformedArgs.toPrettyString()}
             """.trimMargin()