How to fix the error: unused native file on Windows 11?

[PetrVachal]

Hello IT ladies and IT gentlemen.

I followed the instructions for build webapp helloworld based on J2CL, built by Bazel on page: https://github.com/google/j2cl/blob/master/docs/getting-started.md

So, my input:
bazel build src/main/java/com/google/j2cl/samples/helloworld:helloworld --verbose_failures

An error occured at the end of build J2CL at the transpiling Java to JS: (total of 9 errors)
Error: Unused native file: some_file.js

My configuration: Win11, JDK 11.0.16, Bazel 5.1.0

I tried to build hello_world app in git bash, Windows Powershell and MSYS2 but same error occured in all these terminals

My output:
...
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_def.inc
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_undef.inc
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/map_field.h
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/map_entry.h
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/reflection_ops.h
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_def.inc
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_undef.inc
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_def.inc
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_undef.inc
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_def.inc
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_undef.inc
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/text_format.h
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_def.inc
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_undef.inc
Poznámka: Včetně souboru: external/com_google_protobuf/src\google/protobuf/port_def.inc
INFO: From Building external/com_google_j2cl/transpiler/java/com/google/j2cl/transpiler/ast/libast.jar (112 source files) and running annotation processors (AutoAnnotationProcessor, AutoOneOfProcessor, AutoValueProcessor, J2clAstProcessor):
warning: File for type 'com.google.j2cl.transpiler.ast.AbstractVisitor' created in the last round will not be subject to annotation processing.
warning: File for type 'com.google.j2cl.transpiler.ast.AbstractRewriter' created in the last round will not be subject to annotation processing.
warning: File for type 'com.google.j2cl.transpiler.ast.ProcessorPrivate' created in the last round will not be subject to annotation processing.
INFO: From Executing genrule @io_bazel_rules_kotlin//src/main/kotlin/io/bazel/kotlin/builder:builder_kt_jar [for host]:
external\io_bazel_rules_kotlin\src\main\kotlin\io\bazel\kotlin\builder\tasks\BazelWorker.kt:121:9: warning: unreachable code
throw RuntimeException("drop through")
^
external\io_bazel_rules_kotlin\src\main\kotlin\io\bazel\kotlin\builder\tasks\KotlinBuilder.kt:142:64: warning: 'toUpperCase(): String' is deprecated. Use uppercase() instead.
platform = checkNotNull(Platform.valueOf(it[1].toUpperCase())) {
^
external\io_bazel_rules_kotlin\src\main\kotlin\io\bazel\kotlin\builder\tasks\KotlinBuilder.kt:145:64: warning: 'toUpperCase(): String' is deprecated. Use uppercase() instead.
ruleKind = checkNotNull(RuleKind.valueOf(it[2].toUpperCase())) {
^
external\io_bazel_rules_kotlin\src\main\kotlin\io\bazel\kotlin\builder\utils\BazelUtils.kt:26:59: warning: 'toLowerCase(): String' is deprecated. Use lowercase() instead.
private val isWindows = System.getProperty("os.name").toLowerCase().indexOf("win") >= 0
^
external\io_bazel_rules_kotlin\src\main\kotlin\io\bazel\kotlin\builder\utils\TaskUtils.kt:24:75: warning: 'toLowerCase(): String' is deprecated. Use lowercase() instead.
val CompilationTaskInfo.bazelRuleKind: String get() = "kt_${platform.name.toLowerCase()}${ruleKind.name.toLowerCase()}"
^
external\io_bazel_rules_kotlin\src\main\kotlin\io\bazel\kotlin\builder\utils\TaskUtils.kt:24:106: warning: 'toLowerCase(): String' is deprecated. Use lowercase() instead.
val CompilationTaskInfo.bazelRuleKind: String get() = "kt${platform.name.toLowerCase()}_${ruleKind.name.toLowerCase()}"
^
INFO: From jarjar @io_bazel_rules_kotlin//src/main/kotlin:builder_jar_jar [for host]:
Fully-qualified classname does not match jar entry:
jar entry: META-INF/versions/9/module-info.class
class name: module-info.class
Omitting META-INF/versions/9/module-info.class.
INFO: From Compiling Kotlin to JVM @com_google_j2cl//transpiler/java/com/google/j2cl/transpiler/backend/kotlin/common:common { kt: 7, java: 0, srcjars: 0 }:
warning: '-Xuse-experimental' is deprecated and will be removed in a future release, please use -opt-in instead
warning: language version 1.3 is deprecated and its support will be removed in a future version of Kotlin
warning: '-Xuse-experimental' is deprecated and will be removed in a future release, please use -opt-in instead
warning: language version 1.3 is deprecated and its support will be removed in a future version of Kotlin
INFO: From Compiling Kotlin to JVM @com_google_j2cl//transpiler/java/com/google/j2cl/transpiler/backend/kotlin/source:source { kt: 1, java: 0, srcjars: 0 }:
warning: '-Xuse-experimental' is deprecated and will be removed in a future release, please use -opt-in instead
warning: language version 1.3 is deprecated and its support will be removed in a future version of Kotlin
warning: '-Xuse-experimental' is deprecated and will be removed in a future release, please use -opt-in instead
warning: language version 1.3 is deprecated and its support will be removed in a future version of Kotlin
INFO: From Compiling Kotlin to JVM @com_google_j2cl//transpiler/java/com/google/j2cl/transpiler/backend/kotlin/ast:ast { kt: 5, java: 0, srcjars: 0 }:
warning: '-Xuse-experimental' is deprecated and will be removed in a future release, please use -opt-in instead
warning: language version 1.3 is deprecated and its support will be removed in a future version of Kotlin
warning: '-Xuse-experimental' is deprecated and will be removed in a future release, please use -opt-in instead
warning: language version 1.3 is deprecated and its support will be removed in a future version of Kotlin
INFO: From Compiling Kotlin to JVM @com_google_j2cl//transpiler/java/com/google/j2cl/transpiler/backend/kotlin/objc:objc { kt: 4, java: 0, srcjars: 0 }:
warning: '-Xuse-experimental' is deprecated and will be removed in a future release, please use -opt-in instead
warning: language version 1.3 is deprecated and its support will be removed in a future version of Kotlin
warning: '-Xuse-experimental' is deprecated and will be removed in a future release, please use -opt-in instead
warning: language version 1.3 is deprecated and its support will be removed in a future version of Kotlin
INFO: From Compiling Kotlin to JVM @com_google_j2cl//transpiler/java/com/google/j2cl/transpiler/backend/kotlin:kotlin { kt: 25, java: 0, srcjars: 0 }:
warning: '-Xuse-experimental' is deprecated and will be removed in a future release, please use -opt-in instead
warning: language version 1.3 is deprecated and its support will be removed in a future version of Kotlin
external\com_google_j2cl\transpiler\java\com\google\j2cl\transpiler\backend\kotlin\ExpressionRenderer.kt:537:43: warning: parameter 'superReference' is never used
private fun Renderer.superReferenceSource(superReference: SuperReference): Source =
^
warning: '-Xuse-experimental' is deprecated and will be removed in a future release, please use -opt-in instead
warning: language version 1.3 is deprecated and its support will be removed in a future version of Kotlin
external\com_google_j2cl\transpiler\java\com\google\j2cl\transpiler\backend\kotlin\ExpressionRenderer.kt:537:43: warning: parameter 'superReference' is never used
private fun Renderer.superReferenceSource(superReference: SuperReference): Source =
^
ERROR: C:/msys64/home/vachal/_bazel_vachal/juh3klpa/external/com_google_j2cl/jre/java/BUILD:171:13: Transpiling to JavaScript @com_google_j2cl//jre/java:jre failed: (Exit 1): BazelJ2clBuilder.exe failed: error executing command
cd /d C:/msys64/home/vachal/_bazel_vachal/juh3klpa/execroot/com_google_j2cl_samples_helloworld
SET LANG=en_US.UTF-8
bazel-out\x64_windows-opt-exec-2B5CBBC6\bin\external\com_google_j2cl\transpiler\java\com\google\j2cl\transpiler\BazelJ2clBuilder.exe @bazel-out/x64_windows-fastbuild/bin/external/com_google_j2cl/jre/java/jre.js-0.params
#Configuration: 62a8c95f4093f157ff190a4a8a712c7a0cf98bea47e8aa6822b4f0d8f2a9f247
#Execution platform: @local_config_platform//:host
Error: Unused native file 'java/lang/Class.native.js'.
Error: Unused native file 'java/lang/IntegralToString.native.js'.
Error: Unused native file 'javaemul/internal/Casts.native.js'.
Error: Unused native file 'javaemul/internal/ConsoleLogger.native.js'.
Error: Unused native file 'javaemul/internal/HashCodes.native.js'.
Error: Unused native file 'javaemul/internal/JsUtils.native.js'.
Error: Unused native file 'javaemul/internal/Objects.native.js'.
Error: Unused native file 'javaemul/internal/ThrowableUtils.native.js'.
Error: Unused native file 'javaemul/internal/ValueType.native.js'.
9 error(s), 0 warning(s).
Target //src/main/java/com/google/j2cl/samples/helloworld:helloworld failed to build
INFO: Elapsed time: 180.807s, Critical Path: 54.75s
INFO: 588 processes: 54 internal, 478 local, 56 worker.
FAILED: Build did NOT complete successfully

Please, give me any advice.
What does it mean "Unused native file"? How can I fix this error?

[gkdn]

Please see #9 and #121

Per earlier comments, the maven plugin developed by the community works on windows. You can try that.