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https://issues.apache.org/jira/browse/DERBY-3117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12538095
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Rick Hillegas commented on DERBY-3117:
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Hi Knut,
You raise a good point here. This gets to be a little tricky to do in an xml
script-my experience is that xml is a lousy language in which to write
procedural code. Fortunately, there's a trapdoor for this kind of problem,
viz., you write a custom ant Task. The Task would have to be compiled before
we needed to look at jdk14, jdk15, java14comple.classpath, and
java15compile.classpath. The Task could use
org.apache.tools.ant.taskdefs.Property to set those properties based on the
JDK vendor, the operating system, and $JAVA_HOME. I could write this task and
plug in the logic for Max OS X. Other people could plug in the logic for their
favorite build environments later on. And of course, the current model of
forcibly setting values in ant.properties would continue to work.
> Adjust master build script to require the Java 5 compiler to build Derby
> ------------------------------------------------------------------------
>
> Key: DERBY-3117
> URL: https://issues.apache.org/jira/browse/DERBY-3117
> Project: Derby
> Issue Type: Improvement
> Components: Build tools
> Affects Versions: 10.4.0.0
> Reporter: Rick Hillegas
> Assignee: Rick Hillegas
> Attachments: BuildDefaults.txt, derby-3117-01-enforceJava5-aa.diff,
> derby-3117-01-enforceJava5-ab.diff, derby-3117-01-enforceJava5-ac.diff,
> derby-3117-02-website-aa.diff, derby-3117-03-junit-aa.diff, derby_source.html
>
>
> Require the Java 5 compiler in order to build Derby as approved by the
> community recently:
> http://www.nabble.com/-VOTE--Require-Java-5-%28or-later%29-compiler-to-build-Derby-tf4522491.html#a13030783
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