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From "Rick Hillegas (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1078) Be able to build Derby when JAVA_HOME is set 1.6
Date Thu, 16 Mar 2006 21:59:00 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1078?page=comments#action_12370759 ] 

Rick Hillegas commented on DERBY-1078:
--------------------------------------

Bryan adds:

Can you use <presetdef> for this? It lets you override/extend tasks and provide additional
parms, etc.

http://ant.apache.org/manual/CoreTasks/presetdef.html
http://stefan.samaflost.de/blog/en/Apache/Ant/customization_and_user_preferences_with_presetdef.writeback


> Be able to build Derby when JAVA_HOME is set 1.6
> ------------------------------------------------
>
>          Key: DERBY-1078
>          URL: http://issues.apache.org/jira/browse/DERBY-1078
>      Project: Derby
>         Type: Improvement
>   Components: Build tools
>     Versions: 10.2.0.0
>     Reporter: Rick Hillegas
>      Fix For: 10.3.0.0

>
> Currently, the 1.4 compiler is used to build most of Derby. We use the 1.6 compiler to
(optionally) build the JDBC4 support. If you try to build Derby in a shell window with a 1.6
JAVA_HOME, the 1.4 bits will fail to build. This is because those bits do not satisfy the
JDBC4 contract. In addition, even if you could build those bits under 1.6, the 1.6 class files
would fail to load on a 1.4 vm.
> We need to be able to use 1.6 as our default build environment but still generate jar
files which run on 1.4 and 1.5. There may be compiler switches which allow this. If not, building
in a 1.6 environment could fault in the 1.4 compiler as necessary.

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