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Date: Tue, 25 Oct 2011 19:20:32 +0000 (UTC)
From: "Rick Hillegas (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (DERBY-5469) Make it possible to build Derby if
 you are on Mac OS X and your JDK is JDK 7
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    [ https://issues.apache.org/jira/browse/DERBY-5469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13135343#comment-13135343 ] 

Rick Hillegas commented on DERBY-5469:
--------------------------------------

Thanks, Kathey. The PropertySetter task does look at system properties. However, where it's falling down is in the part of its processing where it looks around the directory system to find other JDKs. It does this so that it can find libraries for lower versions of the JDK. In particular, it wants to find a 1.4 JDK if it can so that it can use those libraries when compiling the bulk of Derby code. Being able to use those libraries means that the compiler can object if someone tries to call a Java 6 method in code which is supposed to run on small devices.

It's a very tricky piece of logic and I am beginning to fear that the number of special cases may be expanding faster than we can keep up with them.

Standard attributes in the jar manifest are documented here: http://download.oracle.com/javase/1.4.2/docs/guide/jar/jar.html#Manifest%20Specification

Thanks,
-Rick
                
> Make it possible to build Derby if you are on Mac OS X and your JDK is JDK 7
> ----------------------------------------------------------------------------
>
>                 Key: DERBY-5469
>                 URL: https://issues.apache.org/jira/browse/DERBY-5469
>             Project: Derby
>          Issue Type: Improvement
>          Components: Build tools
>            Reporter: Rick Hillegas
>            Assignee: Rick Hillegas
>         Attachments: derby-5469-01-ae-add17andJavadoc.diff, derby-5469-01-af-dontSetUprevVariables.diff, derby-5469-01-ag-cleanedUp.diff
>
>


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