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https://issues.apache.org/jira/browse/DERBY-5485?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13140063#comment-13140063
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Knut Anders Hatlen commented on DERBY-5485:
-------------------------------------------

I successfully built Derby with Java 1.5, 1.6 and 1.7 on Solaris after applying 
the patch.

There's a small typo in BUILDING.html under Advanced Build:

> Derby is supposed to run in all of the following environments:
> (...)
> Java 6        JDBC 4.1

It should say JDBC 4.0 here, I think.
                
> Simplify PropertySetter so that it is less brittle and easier to maintain.
> --------------------------------------------------------------------------
>
>                 Key: DERBY-5485
>                 URL: https://issues.apache.org/jira/browse/DERBY-5485
>             Project: Derby
>          Issue Type: Improvement
>          Components: Build tools
>    Affects Versions: 10.9.0.0
>            Reporter: Rick Hillegas
>         Attachments: derby-5485-01-af-simplifyPlusJavadoc.diff
>
>
> The PropertySetter task sets up classpath variables so that the build can 
> take advantage of JVM-specific class libraries. Using those libraries makes 
> it possible for the compiler to flag code which is supposed to run on less 
> capable platforms but which calls methods from later JVMs. This is a very 
> tricky problem and we seem to have reached consensus that it requires too 
> much effort to make PropertySetter run correctly in all of the build 
> environments which Derby developers use. I will attach a proposal for how to 
> simplify PropertySetter so that it requires less effort to maintain.

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