Change policy with legacy compiler backend

[JS] Remove incremental js jps test [JS] Remove test of maven js archetype [JS] Fix another one test [JS] Fix tests for jps [JS] Try to fix maven test data [JS] Fix test data [JS] Fix test data for ant [JS] Fix jsExtraHelp test [JS] Fix test run from not-Gradle build tools [JS] Set flag without compiler error [JS] Disable warnings and errors in legacy compiler called from Gradle [JS] Proofread messages [JS] Not proofread messages KT-42326
2022-09-29 13:56:30 +00:00
parent a3ad0a6e88
commit c726360ad2
113 changed files with 498 additions and 745 deletions
@@ -1,5 +1,6 @@
 compiler/testData/integration/ant/js/simpleWithoutStdlibAndFolderAsAnotherLib/jslib-example/LibraryExample.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -meta-info
 -output
 $TEMP_DIR$/jslib-example.js
@@ -1,5 +1,6 @@
 $TEMP_DIR$
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -no-stdlib
 -output
 $TESTDATA_DIR$
@@ -1,4 +1,5 @@
 $TESTDATA_DIR$/inlineCycle.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -output
 $TEMP_DIR$
@@ -44,6 +44,8 @@ where advanced options include:
  -Xrepositories=<path>      Paths to additional places where libraries could be found
  -Xstrict-implicit-export-types Generate strict types for implicitly exported entities inside d.ts files. Available in IR backend only.
  -Xtyped-arrays             Translate primitive arrays to JS typed arrays
+  -Xuse-deprecated-legacy-compiler
+                             Use deprecated legacy compiler without error
  -Xwasm                     Use experimental WebAssembly compiler backend
  -Xwasm-debug-info          Add debug info to WebAssembly compiled module
  -Xwasm-enable-array-range-checks
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/simple2js.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -kotlin-home
 $TESTDATA_DIR$
 -output
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/../kotlinPackage.kt
 -no-stdlib
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -output
 $TEMP_DIR$/out.js
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/languageVersion.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -output
 $TEMP_DIR$/out.js
 -language-version
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/withLib.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -libraries
 not/existing/path
 -output
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/separateModules/sepModule1.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -meta-info
 -Xmetadata-only
 -output
@@ -7,6 +8,7 @@ $TEMP_DIR$/m1/m1.js
 ---
 $TESTDATA_DIR$/separateModules/sepModule2.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -libraries
 $TEMP_DIR$/m1
 -output
@@ -1,11 +1,13 @@
 $TESTDATA_DIR$/separateModules/sepModule1.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -meta-info
 -output
 $TEMP_DIR$/m1/m.js
 ---
 $TESTDATA_DIR$/separateModules/sepModule2.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -libraries
 $TEMP_DIR$/m1
 -output
@@ -1,11 +1,13 @@
 $TESTDATA_DIR$/separateModules/sepModule3.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -meta-info
 -output
 $TEMP_DIR$/m3/m.js
 ---
 $TESTDATA_DIR$/separateModules/sepModule4.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -libraries
 $TEMP_DIR$/m3
 -output
@@ -1,5 +1,6 @@
 not/existing/path
 -no-stdlib
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -output
 $TESTDATA_DIR$
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/withLib.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -libraries
 compiler/testData/integration/ant/js/simpleWithJsFileAsAnotherLib
 -output
@@ -1,4 +1,5 @@
 $TESTDATA_DIR$/simple2js.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -output
 $TESTDATA_DIR$
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/simple2js.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -output
 $TEMP_DIR$/out.js
 -output-postfix
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/simple2js.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -output
 $TEMP_DIR$/out.js
 -output-prefix
@@ -1,4 +1,5 @@
 $TESTDATA_DIR$/reifiedIntersectionType.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -output
 $TEMP_DIR$/out.js
@@ -1,4 +1,5 @@
 $TESTDATA_DIR$/simple2js.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -output
 $TEMP_DIR$/out.js
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/sourceMap.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -source-map
 -source-map-prefix
 ./
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/sourceMapCharEscape.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -source-map
 -source-map-embed-sources
 always
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/sourceMapDuplicatePath/
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -source-map
 -source-map-base-dirs
 $TESTDATA_DIR$/sourceMapDuplicatePath/foo:$TESTDATA_DIR$/sourceMapDuplicatePath/bar
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/sourceMap.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -source-map
 -source-map-prefix
 ./
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/sourceMap.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -source-map
 -source-map-prefix
 /localhost/src/
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/sourceMapRelativeRoot/lib/src/lib.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -source-map
 -meta-info
 -output
@@ -7,6 +8,7 @@ $TESTDATA_DIR$/sourceMapRelativeRoot/lib/out/lib.js
 ---
 $TESTDATA_DIR$/sourceMapRelativeRoot/main/src/main.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -libraries
 $TESTDATA_DIR$/sourceMapRelativeRoot/lib/out/
 -source-map
@@ -1,6 +1,7 @@
 $TESTDATA_DIR$/sourceMapRoot/foo/file1.kt
 $TESTDATA_DIR$/sourceMapRoot/bar/file2.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -source-map
 -source-map-prefix
 ./
@@ -1,6 +1,7 @@
 $TESTDATA_DIR$/sourceMapRoot/foo/file1.kt
 $TESTDATA_DIR$/sourceMapRoot/bar/file2.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -source-map
 -source-map-base-dirs
 $TESTDATA_DIR$/
@@ -3,6 +3,7 @@ $TESTDATA_DIR$/sourceMapRoot/bar/file2.kt
 $TESTDATA_DIR$/sourceMapRoot/bar/baz/file3.kt
 $TESTDATA_DIR$/sourceMapRoot/foo/baz/file4.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -source-map
 -source-map-base-dirs
 $TESTDATA_DIR$/sourceMapRoot/foo
@@ -1,6 +1,7 @@
 $TESTDATA_DIR$/sourceMapRoot/foo/file1.kt
 $TESTDATA_DIR$/sourceMapRoot/bar/file2.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -source-map
 -source-map-base-dirs
 $TESTDATA_DIR$/foo:$TESTDATA_DIR$/bar
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/../warnings.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -nowarn
 -output
 $TEMP_DIR$/out.js
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/withLib.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -libraries
 $TESTDATA_DIR$/folderAsLib
 -output
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/withLib.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -libraries
 $TESTDATA_DIR$/lib/LibraryExample.jar
 -output
@@ -1,5 +1,6 @@
 $TESTDATA_DIR$/simple2js.kt
 -Xlegacy-deprecated-no-warn
+-Xuse-deprecated-legacy-compiler
 -no-stdlib
 -libraries
 $TESTDATA_DIR$/wrongAbiVersionLib/wrongAbiLib.meta.js
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/hello.kt] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -4,6 +4,7 @@
    <target name="build">
        <kotlin2js src="${test.data}/hello.kt" output="${temp}/out.js">
            <compilerarg value="-Xno-inline"/>
+            <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
        </kotlin2js>
    </target>
 </project>
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -5,6 +5,8 @@
    <kotlin2js src="${test.data}/root1"
               output="${temp}/out.js"
               outputPrefix="${test.data}/prefix"
-               outputPostfix="${test.data}/postfix" />
+               outputPostfix="${test.data}/postfix">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1, [TestData]/bar.kt, [TestData]/root2/Foo.kt] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -9,6 +9,7 @@
           <include name="**/*.kt"/>
         </fileset>
       </src>
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
    </kotlin2js>
  </target>
 </project>
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" outputPostfix="${test.data}/postfix" />
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" outputPostfix="${test.data}/postfix">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" outputPrefix="${test.data}/prefix" />
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" outputPrefix="${test.data}/prefix">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -2,7 +2,14 @@ OUT:
 Buildfile: [TestData]/build.xml

 build:
-     [java] warning: legacy compiler is deprecated. Please migrate onto IR.
+     [java] warning: ==========
+     [java] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+     [java]
+     [java] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+     [java] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+     [java]
+     [java] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+     [java] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -6,6 +6,7 @@
        <pathelement location="${kotlin.lib}/kotlin-stdlib.jar"/>
      </classpath>
      <arg value="${test.data}/root1/foo.kt"/>
+      <arg value="-Xuse-deprecated-legacy-compiler"/>
      <arg value="-output"/>
      <arg value="out.js"/>
      <jvmarg value="-noverify"/>
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call"/>
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -4,9 +4,23 @@ Buildfile: [TestData]/build.xml
 build:
    [mkdir] Created dir: [Temp]/lib
 [kotlin2js] Compiling [[TestData]/jslib-example] => [[Temp]/lib/jslib-example.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
     [copy] Copying 2 files to [Temp]

 BUILD SUCCESSFUL
@@ -5,12 +5,15 @@
  <target name="build">
    <mkdir dir="${temp.library.path}"/>

-    <kotlin2js src="${library.path}" output="${temp.library.path}/jslib-example.js" metaInfo="true"/>
+    <kotlin2js src="${library.path}" output="${temp.library.path}/jslib-example.js" metaInfo="true">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>

    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call">
      <libraries>
        <pathelement path="${temp.library.path}/jslib-example.meta.js"/>
      </libraries>
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
    </kotlin2js>
    <copy todir="${temp}">
      <fileset dir="${temp.library.path}">
@@ -4,9 +4,23 @@ Buildfile: [TestData]/build.xml
 build:
    [mkdir] Created dir: [Temp]/lib
 [kotlin2js] Compiling [[TestData]/jslib-example] => [[Temp]/lib/jslib-example.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
     [copy] Copying 2 files to [Temp]
     [copy] Copying 1 file to [Temp]

@@ -5,12 +5,15 @@
  <target name="build">
    <mkdir dir="${temp.library.path}"/>

-    <kotlin2js src="${library.path}" output="${temp.library.path}/jslib-example.js" metaInfo="true" moduleKind="umd"/>
+    <kotlin2js src="${library.path}" output="${temp.library.path}/jslib-example.js" metaInfo="true" moduleKind="umd">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>

    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call" moduleKind="amd">
      <libraries>
        <pathelement path="${temp.library.path}/jslib-example.meta.js"/>
      </libraries>
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
    </kotlin2js>
    <copy todir="${temp}">
      <fileset dir="${temp.library.path}">
@@ -4,15 +4,36 @@ Buildfile: [TestData]/build.xml
 build:
    [mkdir] Created dir: [Temp]/lib
 [kotlin2js] Compiling [[TestData]/jslib-example1] => [[Temp]/lib/jslib-example1.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
 [kotlin2js] Compiling [[TestData]/jslib-example2] => [[Temp]/lib/jslib-example2.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
   [delete] Deleting: [Temp]/lib/jslib-example1.js
   [delete] Deleting: [Temp]/lib/jslib-example2.js
   [delete] Deleting: [Temp]/lib/jslib-example1.meta.js
   [delete] Deleting: [Temp]/lib/jslib-example2.meta.js
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
     [copy] Copying 1 file to [Temp]

 BUILD SUCCESSFUL
@@ -6,11 +6,14 @@
  <target name="build">
    <mkdir dir="${temp.library.path}"/>

-    <kotlin2js src="${library.path1}" output="${temp.library.path}/jslib-example1.js" metaInfo="true"/>
+    <kotlin2js src="${library.path1}" output="${temp.library.path}/jslib-example1.js" metaInfo="true">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
    <kotlin2js src="${library.path2}" output="${temp.library.path}/jslib-example2.js" metaInfo="true">
      <libraries>
        <pathelement path="${temp.library.path}/jslib-example1.meta.js"/>
      </libraries>
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
    </kotlin2js>

    <concat destfile="${temp.library.path}/jslib-example.js">
@@ -29,6 +32,7 @@
      <libraries>
        <pathelement path="${temp.library.path}/jslib-example.js"/>
      </libraries>
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
    </kotlin2js>
    <copy todir="${temp}">
      <fileset dir="${temp.library.path}">
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call"/>
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call"/>
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -4,11 +4,32 @@ Buildfile: [TestData]/build.xml
 build:
    [mkdir] Created dir: [Temp]/lib
 [kotlin2js] Compiling [[TestData]/jslib-example1] => [[Temp]/lib/jslib-example1.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
 [kotlin2js] Compiling [[TestData]/jslib-example2] => [[Temp]/lib/jslib-example2.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
     [copy] Copying 4 files to [Temp]

 BUILD SUCCESSFUL
@@ -6,11 +6,14 @@
  <target name="build">
    <mkdir dir="${temp.library.path}"/>

-    <kotlin2js src="${library.path1}" output="${temp.library.path}/jslib-example1.js" metaInfo="true"/>
+    <kotlin2js src="${library.path1}" output="${temp.library.path}/jslib-example1.js" metaInfo="true">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
    <kotlin2js src="${library.path2}" output="${temp.library.path}/jslib-example2.js" metaInfo="true">
      <libraries>
        <pathelement path="${temp.library.path}/jslib-example1.meta.js"/>
      </libraries>
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
    </kotlin2js>

    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call">
@@ -18,6 +21,7 @@
        <pathelement path="${temp.library.path}/jslib-example1.meta.js"/>
        <pathelement path="${temp.library.path}/jslib-example2.meta.js"/>
      </libraries>
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
    </kotlin2js>
    <copy todir="${temp}">
      <fileset dir="${temp.library.path}">
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call"/>
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" noStdlib="true" output="${temp}/out.js"/>
+    <kotlin2js src="${test.data}/root1" noStdlib="true" output="${temp}/out.js">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -4,9 +4,23 @@ Buildfile: [TestData]/build.xml
 build:
    [mkdir] Created dir: [Temp]/lib
 [kotlin2js] Compiling [[TestData]/jslib-example] => [[Temp]/lib/jslib-example.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
     [copy] Copying 2 files to [Temp]

 BUILD SUCCESSFUL
@@ -5,12 +5,15 @@
  <target name="build">
    <mkdir dir="${temp.library.path}"/>

-    <kotlin2js src="${library.path}" noStdlib="true" output="${temp.library.path}/jslib-example.js" metaInfo="true"/>
+    <kotlin2js src="${library.path}" noStdlib="true" output="${temp.library.path}/jslib-example.js" metaInfo="true">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>

    <kotlin2js src="${test.data}/root1" noStdlib="true" output="${temp}/out.js" main="call">
      <libraries>
        <pathelement path="${temp.library.path}"/>
      </libraries>
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
    </kotlin2js>
    <copy todir="${temp}">
      <fileset dir="${temp.library.path}">
@@ -4,9 +4,23 @@ Buildfile: [TestData]/build.xml
 build:
    [mkdir] Created dir: [Temp]/lib
 [kotlin2js] Compiling [[TestData]/jslib-example] => [[Temp]/lib/jslib-example.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========
     [copy] Copying 2 files to [Temp]

 BUILD SUCCESSFUL
@@ -5,12 +5,15 @@
  <target name="build">
    <mkdir dir="${temp.library.path}"/>

-    <kotlin2js src="${library.path}" noStdlib="true" output="${temp.library.path}/jslib-example.js" metaInfo="true"/>
+    <kotlin2js src="${library.path}" noStdlib="true" output="${temp.library.path}/jslib-example.js" metaInfo="true">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>

    <kotlin2js src="${test.data}/root1" noStdlib="true" output="${temp}/out.js" main="call">
      <libraries>
        <pathelement path="${temp.library.path}/jslib-example.meta.js"/>
      </libraries>
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
    </kotlin2js>
    <copy todir="${temp}">
      <fileset dir="${temp.library.path}">
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" sourcemap="true"/>
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" sourcemap="true">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -3,7 +3,14 @@ Buildfile: [TestData]/build.xml

 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" nowarn="true"/>
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" nowarn="true">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -6,7 +6,14 @@ build:
 [kotlin2js] logging: using Kotlin home directory [KotlinProjectHome]/dist/kotlinc
 [kotlin2js] logging: exception on loading scripting plugin: java.lang.ClassNotFoundException: org.jetbrains.kotlin.scripting.compiler.plugin.ScriptingCompilerConfigurationComponentRegistrar
 [kotlin2js] logging: compiling source files: [TestData]/root1/foo.kt
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" verbose="true"/>
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" verbose="true">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -4,7 +4,14 @@ Buildfile: [TestData]/build.xml
 build:
 [kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
 [kotlin2js] info: kotlinc-js [KotlinVersion] (JRE [JREVersion])
-[kotlin2js] warning: legacy compiler is deprecated. Please migrate onto IR.
+[kotlin2js] warning: ==========
+[kotlin2js] This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+[kotlin2js]
+[kotlin2js] Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+[kotlin2js] Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+[kotlin2js]
+[kotlin2js] You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+[kotlin2js] ==========

 BUILD SUCCESSFUL
 Total time: [time]
@@ -2,6 +2,8 @@
  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

  <target name="build">
-    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" printVersion="true"/>
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" printVersion="true">
+      <compilerarg value="-Xuse-deprecated-legacy-compiler"/>
+    </kotlin2js>
  </target>
 </project>
@@ -9,4 +9,11 @@ Output:
 -- JS --
 Exit code: OK
 Output:
-warning: legacy compiler is deprecated. Please migrate onto IR.
+warning: ==========
+This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+
+Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+
+You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+==========
@@ -9,4 +9,11 @@ Output:
 -- JS --
 Exit code: OK
 Output:
-warning: legacy compiler is deprecated. Please migrate onto IR.
+warning: ==========
+This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+
+Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+
+You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+==========
@@ -21,7 +21,14 @@ actual class Foo2 actual constructor(actual val y: String)
 -- JS --
 Exit code: COMPILATION_ERROR
 Output:
-warning: legacy compiler is deprecated. Please migrate onto IR.
+warning: ==========
+This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+
+Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+
+You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+==========
 compiler/testData/multiplatform/inlineClasses/js.kt:5:1: error: actual class 'Foo2' has no corresponding expected declaration
 The following declaration is incompatible because modifiers are different (companion, inner, inline):
    public final expect inline class Foo2
@@ -5,4 +5,11 @@ Output:
 -- JS --
 Exit code: OK
 Output:
-warning: legacy compiler is deprecated. Please migrate onto IR.
+warning: ==========
+This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+
+Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+
+You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+==========
@@ -9,4 +9,11 @@ Output:
 -- JS --
 Exit code: OK
 Output:
-warning: legacy compiler is deprecated. Please migrate onto IR.
+warning: ==========
+This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+
+Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+
+You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+==========
@@ -9,4 +9,11 @@ Output:
 -- JS --
 Exit code: OK
 Output:
-warning: legacy compiler is deprecated. Please migrate onto IR.
+warning: ==========
+This project currently uses the Kotlin/JS Legacy compiler backend, which has been deprecated and will be removed in a future release.
+
+Please migrate your project to the new IR-based compiler (https://kotl.in/jsir).
+Because your build tool will not support the new Kotlin/JS compiler, you will also need to migrate to Gradle.
+
+You can continue to use the deprecated legacy compiler in the current version of the toolchain by providing the compiler option -Xuse-deprecated-legacy-compiler.
+==========