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Re: [cross-project-issues-dev] JarProcessor and Java versions
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Andrew, John,
Thanks for your input. I am using Java 1.6 to do the packaging. The
problem arises when someone using Java 1.5 tries to unpack.
The whole objective with my exercise is to be able to build Java 1.5
compatible binaries with only Java 1.6 installed so pointing to a Java
1.5 version of the pack200 is not an option for me.
I looked at the API docs for pack200. It says that "In order to maintain
backward compatibility, if the input JAR-files are solely comprised of
1.5 (or lesser) classfiles, a 1.5 compatible pack file is produced.
Otherwise a 1.6 compatible pack200 file is produced." So I checked the
original zip file and its contained jar files, nested jar files and all
files contained in them. I have no class file that has a major version
higher then 49 (Java 6 is >= 50). The same is true after the file has
been normalized. So something else must be happening.
- thomas
Andrew Niefer wrote:
If this error message is implying that your classes were compiled 1.6,
it would be a good idea to use a 1.6 vm to do the packing.
As John points out there is an option to choose the pack200 by setting
system property to the directory containing the pack200 tools.
-Andrew
*John Arthorne/Ottawa/IBM@IBMCA*
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11/30/2007 09:28 AM
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Re: [cross-project-issues-dev] JarProcessor and Java versions
This page lists all the options supported by the jar processor:
http://wiki.eclipse.org/JarProcessor_Options
Note at the bottom of the page there is a system property where you
can specify the exact pack200 command to use.
--
*Thomas Hallgren <thomas@xxxxxxx>*
Sent by: cross-project-issues-dev-bounces@xxxxxxxxxxx
11/29/2007 07:32 PM
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[cross-project-issues-dev] JarProcessor and Java versions
Hi,
I'm wondering if there are some options that can be passed to the
Eclipse jarProcessor that will restrict the pack200 to a certain target
level. My objective is to restrict builds to a certain target level
(Java 1.5) regardless of what JVM that is used for the build. The build
uses the ant task 'eclipse.jarProcessor'
At present, a machine running Java 1.5 will fail with the following on
the top of the stack:
Stack Trace:
java.io.IOException: Corrupted pack file: magic/ver = CAFED00D/160.1
should be CAFED00D/150.7
at com.sun.java.util.jar.pack.NativeUnpack.start(Native Method)
at com.sun.java.util.jar.pack.NativeUnpack.run(Unknown Source)
at com.sun.java.util.jar.pack.NativeUnpack.run(Unknown Source)
at com.sun.java.util.jar.pack.UnpackerImpl.unpack(Unknown Source)
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