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https://issues.apache.org/jira/browse/DERBY-6856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15136684#comment-15136684
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Knut Anders Hatlen commented on DERBY-6856:
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Hopefully, Ant's javac task gets support for the new -release option before or
around the time JDK 9 gets out. If not, I suppose we can always add
{{<compilerarg line="-release 8" compiler="javac1.9"/>}} to the javac targets
in our build scripts. (The "javac1.9" compiler alias is only recognized by Ant
1.9.5 or newer.) I agree that reviving PropertySetter is not a good idea now
that the JDK is about to add a new and better mechanism for cross-compilation.
> Make it possible to build Derby using JDK 9
> -------------------------------------------
>
> Key: DERBY-6856
> URL: https://issues.apache.org/jira/browse/DERBY-6856
> Project: Derby
> Issue Type: Improvement
> Components: Build tools
> Affects Versions: 10.12.1.1
> Reporter: Rick Hillegas
> Attachments: derby-6856-01-ab-addShardingKey.diff,
> derby-6856-01-ac-cleanup.diff
>
>
> Derby can't be built with JDK 9. Java 9 introduces new JDBC classes like
> java.sql.ShardingKey and methods which refer to these new classes.
> In addition, project Jigsaw has created a new way to name classes (see
> http://openjdk.java.net/jeps/220). This breaks the PropertySetter build tool
> which we use so that old JVMs can compile Derby and so that Derby can be
> compiled to run on old JVMs.
> It is likely that we will need to leave this issue open throughout the
> development cycle of Java 9.
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