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Posted to issues@maven.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2016/08/10 19:37:21 UTC

[jira] [Commented] (MCOMPILER-270) Support release=8 on JDK 9 (with fallback on source=8 and target=8 on JDK 8)

    [ https://issues.apache.org/jira/browse/MCOMPILER-270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15415874#comment-15415874 ] 

Hudson commented on MCOMPILER-270:
----------------------------------

SUCCESS: Integrated in maven-plugins #7161 (See [https://builds.apache.org/job/maven-plugins/7161/])
[MCOMPILER-270] Support release=8 on JDK 9 (with fallback on source=8 and target=8 on JDK 8) (rfscholte: [http://svn.apache.org/viewvc/?view=rev&rev=1755804])
* maven-compiler-plugin/src/it/MCOMPILER-270_release
* maven-compiler-plugin/src/it/MCOMPILER-270_release/invoker.properties
* maven-compiler-plugin/src/it/MCOMPILER-270_release/pom.xml
* maven-compiler-plugin/src/it/MCOMPILER-270_release/src
* maven-compiler-plugin/src/it/MCOMPILER-270_release/src/main
* maven-compiler-plugin/src/it/MCOMPILER-270_release/src/main/java
* maven-compiler-plugin/src/it/MCOMPILER-270_release/src/main/java/MyClass.java
* maven-compiler-plugin/src/it/MCOMPILER-270_release/src/test
* maven-compiler-plugin/src/it/MCOMPILER-270_release/src/test/java
* maven-compiler-plugin/src/it/MCOMPILER-270_release/src/test/java/MyTest.java
* maven-compiler-plugin/src/it/MCOMPILER-270_release/verify.groovy
* maven-compiler-plugin/src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java
* maven-compiler-plugin/src/main/java/org/apache/maven/plugin/compiler/CompilerMojo.java
* maven-compiler-plugin/src/main/java/org/apache/maven/plugin/compiler/TestCompilerMojo.java


> Support release=8 on JDK 9 (with fallback on source=8 and target=8 on JDK 8)
> ----------------------------------------------------------------------------
>
>                 Key: MCOMPILER-270
>                 URL: https://issues.apache.org/jira/browse/MCOMPILER-270
>             Project: Maven Compiler Plugin
>          Issue Type: New Feature
>    Affects Versions: 3.5.1
>            Reporter: Geoffrey De Smet
>            Assignee: Robert Scholte
>            Priority: Blocker
>             Fix For: 3.6
>
>
> JDK 9 now supports the the follow argument:
> {code}
> javac -release 7
> {code}
> This replaced both `-source 7` and `-target 7`. And it prevents from using methods introduced in JDK 9 or JDK 8 when compiling for 7 with JDK 9. So `-release 8` basically better in every way than `-source 7 -target 7`.
>   http://mail.openjdk.java.net/pipermail/jdk9-dev/2015-July/002414.html
> Support this in the maven-compiler plugin, something like:
> {code}
>         <plugin>
>           <artifactId>maven-compiler-plugin</artifactId>
>           <configuration>
>             <release>7</release>
>           </configuration>
>         </plugin>
> {code}
> When compiling with JDK 9, it should just do `javac -release 7`.
> When compiling with JDK 8 or lower, it should fallback to `javac -source 7 -target 7`, so it behaves exactly like:
> {code}
>         <plugin>
>           <artifactId>maven-compiler-plugin</artifactId>
>           <configuration>
>             <source>7</source>
>             <target>7</target>
>           </configuration>
>         </plugin>
> {code}



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