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https://issues.apache.org/jira/browse/DERBY-5485?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13145548#comment-13145548
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Dag H. Wanvik commented on DERBY-5485:
--------------------------------------

I teste drove this patch on Windows Vista / Cygwin / Norwegian locale, with JDK 
1.7, JDK 1.6 and JDK 1.5 to build sane jars after clobber. My ant.properties 
was minimal, see below. No issues seen: verified by running sysinfo. 

ant.properties:
---------------------
proceed=false
deprecation=off
printCompilerProperties=true
                
> 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, 
> derby-5485-01-ag-changeJDBClevel.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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