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https://issues.apache.org/jira/browse/DERBY-3117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12541448
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Rick Hillegas commented on DERBY-3117:
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Thanks for the continuing feedback,Thomas. A couple responses follow:
1) The java14compile.classpath is supposed to point at the 1.4 libs. We use
this variable to tell the compiler where the 1.4 libraries live so that the
compiler can object if someone uses Java 5 or Java 6 code in classes which are
supposed to run on 1.4 VMs. Similarly, java15compile.classpath is supposed to
point at the Java 5 libs. That way the compiler can object if someone uses Java
6 code in classes which are supposed to run on Java 5 VMs. For instance, it
would be a mistake to reference JDBC 4.0 extensions in code which is supposed
to run on Java 5. So the setting of java15compile.classpath looks right to me.
The java15compile.classpath should point into a Java 5 library, not a Java 6
library.
2) I think that PropertySetter is picking up the JRE rather than the JDK
because both are visible to it at the same directory level above $JAVA_HOME. We
could put in special logic to make PropertySetter prefer the JDK to the JRE if
it finds both--but since the libraries ought to contain the same jar files, I
don't think this would have any practical impact.
Thanks.
> 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-3117-04-propertySetter-aa.diff, derby-3117-04-propertySetter-ab.diff,
> derby-3117-04-propertySetter-ac.diff, derby-3117-04-propertySetter-ad.diff,
> derby-3117-04-propertySetter-ae.diff, derby-3117-04-propertySetter-af.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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