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https://jira.codehaus.org/browse/MCOMPILER-205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=326661#comment-326661
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SebbASF commented on MCOMPILER-205:
-----------------------------------

Ant had an issue with the package-info.java files and solved it by creating 
empty class files if the javac compiler failed to do so. This is (now) optional 
behaviour.

See https://issues.apache.org/bugzilla/show_bug.cgi?id=52096 for a useful 
discussion.

It points out that JDK 7 javac has the option -Xpkginfo:always

The difference with Ant is that it does not recompile everything just because a 
single p-i file is out of date.
That's an optimisation that Maven could easily implement.
                
> maven-compiler-plugin: incremental compilation broken
> -----------------------------------------------------
>
>                 Key: MCOMPILER-205
>                 URL: https://jira.codehaus.org/browse/MCOMPILER-205
>             Project: Maven 2.x Compiler Plugin
>          Issue Type: Bug
>    Affects Versions: 3.1
>            Reporter: Lukas Fryc
>         Attachments: hello.tgz, no-class-in-java-file.zip
>
>
> When we do {{clean}} -> {{compile}} -> {{compile}}, all Java sources are 
> re-compiled for second compilation steps:
> {code}
> [framework]$ mvn clean
> ...
> [framework]$ mvn compile
> ...
> [INFO] --- maven-compiler-plugin:3.1:compile (precompile-sources-for-cdk) @ 
> richfaces-framework ---
> [INFO] Changes detected - recompiling the module!
> [INFO] Compiling 915 source files to 
> /mnt/workspace/workspaces/richfaces/richfaces5/framework/target/classes
> ...
> [framework]$ mvn compile
> ...
> [INFO] --- maven-compiler-plugin:3.1:compile (precompile-sources-for-cdk) @ 
> richfaces-framework ---
> [INFO] Changes detected - recompiling the module!
> [INFO] Compiling 915 source files to 
> /mnt/workspace/workspaces/richfaces/richfaces5/framework/target/classes
> ...
> {code}
> The source code of the affected project: 
> https://github.com/richfaces/richfaces5/tree/077dcfc0a46d03d7ba9a7ac3e701a4adfb834c71

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