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https://issues.apache.org/jira/browse/DERBY-3989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12663270#action_12663270
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Knut Anders Hatlen commented on DERBY-3989:
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Silly question, but... Does it work without the patch? If I understand the
comments on DERBY-3988 correctly, the combination of the IBM 1.5 compiler and
java16compile.classpath pointing to IBM 1.6 doesn't work. According to those
comments, the build should have printed a message telling you to use a Java 6
compiler. I'm wondering if the build doesn't emit that message because
java16compile.classpath was set implicitly from j16lib, and the build scripts
should be updated to check both java16compile.classpath and j16lib in
checkForProblematicSettings().
> Set the Java 5 compilation path based on the Java 6 compilation path if a
> Java 5 environment can't be found but a Java 6 environment can be
> -------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-3989
> URL: https://issues.apache.org/jira/browse/DERBY-3989
> Project: Derby
> Issue Type: Improvement
> Components: Build tools
> Affects Versions: 10.5.0.0
> Reporter: Rick Hillegas
> Attachments: derby-3989-01-aa-optionalJava5.diff,
> derby-3989-01-ab-optionalJava5.diff
>
>
> This will make the build even more flexible. Probably involves the following
> changes:
> 1) Relaxing the requirement in PropertySetter that a Java 5 JDK must exist
> 2) Having PropertySetter look for a Java 6 JDK (and set
> java16compile.classpath accordingly) just as PropertySetter looks for a Java
> 5 JDK today
> 3) Changing the setCompilerProperties target in the master build script so
> that it
> a) requires that java15compile.classpath or java16compile.classpath is set
> (it's ok for both to be set)
> b) sets java15compile.classpath to ${jdbc3stubs}:${java16compile.classpath}
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