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From "Robert Scholte (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MCOMPILER-339) Skip --release flag if compilerVersion is lower than 1.9
Date Mon, 16 Apr 2018 17:24:00 GMT

    [ https://issues.apache.org/jira/browse/MCOMPILER-339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16439752#comment-16439752
] 

Robert Scholte commented on MCOMPILER-339:
------------------------------------------

My first impression was: duplicate of MCOMPILER-270: reducing release to source/target is
dangerous, because when using {{release}} you are ensured that you're only using code compatible
with version N. By translating it to source/target automatically you will loose this.
The difference in this case is the compilerVersion, but I still have my doubts. I would try
to solve this with a jdk 9 activated profile setting the release value.

> Skip --release flag if compilerVersion is lower than 1.9
> --------------------------------------------------------
>
>                 Key: MCOMPILER-339
>                 URL: https://issues.apache.org/jira/browse/MCOMPILER-339
>             Project: Maven Compiler Plugin
>          Issue Type: Improvement
>    Affects Versions: 3.7.0
>            Reporter: David J. M. Karlsen
>            Priority: Major
>
> usecase: I have a build which is jdk10 by default, declared via the parent-pom.
>  However, one submodule must be compiled and run with java8. I had hoped to get this
working, by setting:
> {noformat}
> <properties>
>   <maven.compiler.release>8</maven.compiler.release>
>   <maven.compiler.source>1.8</maven.compiler.source>
>   <maven.compiler.target>1.8</maven.compiler.target>
>   <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
> </properties>
> {noformat}
>  
> but it will fail with 
> {noformat}
> Caused by: java.lang.IllegalArgumentException: invalid flag: --release*11:53:45*    
at com.sun.tools.javac.api.JavacTool.processOptions (JavacTool.java:206)*11:53:45*     at
com.sun.tools.javac.api.JavacTool.getTask (JavacTool.java:156)*11:53:45*     at com.sun.tools.javac.api.JavacTool.getTask
(JavacTool.java:107)*11:53:45*     at com.sun.tools.javac.api.JavacTool.getTask (JavacTool.java:64)*11:53:45*
    at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess (JavaxToolsCompiler.java:125)*11:53:45*
    at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile (JavacCompiler.java:174)*11:53:45*
    at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute (AbstractCompilerMojo.java:1075)*11:53:45*
    at org.apache.maven.plugin.compiler.TestCompilerMojo.execute (TestCompilerMojo.java:176)*11:53:45*
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:134)*11:53:45*
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)*11:53:45*
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)*11:53:45*
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)*11:53:45*
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)*11:53:45*
    at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
(MultiThreadedBuilder.java:200)*11:53:45*     at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
(MultiThreadedBuilder.java:196)*11:53:45*     at java.util.concurrent.FutureTask.run (FutureTask.java:266)*11:53:45*
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)*11:53:45*
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)*11:53:45*     at java.util.concurrent.ThreadPoolExecutor.runWorker
(ThreadPoolExecutor.java:1149)*11:53:45*     at java.util.concurrent.ThreadPoolExecutor$Worker.run
(ThreadPoolExecutor.java:624)*11:53:45*     at java.lang.Thread.run (Thread.java:748)
> {noformat}
> If the release flag could only be enabled for compiler versions supporting it it would
be easier to juggle the build.



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