Re: [gentoo-java] Falling to the lowest jdk available

["Miroslav Šulc" <miroslav.sulc@startnet.cz>]

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Caster napsal(a):
> Miroslav Šulc wrote:
>   
>> Hi,
>>
>> I've faced a problem with migrated packages on my laptop. If I remember
>> well, I've read somewhere that the new Java system will always try to
>> build packages with the lower JDK possible. At least on my laptop (it's
>> a fresh install of Gentoo - I've installed it about two weeks ago)
>> packages are not built with the lowest JDK possible which results in
>> these bugs when compiling packages dependant on a badly built package:
>>     
>
> It's like this:
>
> DEPEND=">=virtual/jdk-1.4" will make it use 1.4 or higher JDK (it
> prefers the higher, you can tune that in
> /etc/java-config-2/build/jdk.conf) but it will rewrite the build.xml
> file(s) to -source 1.4 -target 1.4 so even with 1.5 JDK it should
> produce 1.4 compatible class files.
>
> DEPEND="=virtual/jdk-1.4" will use 1.4 JDK specifically, in case the
> package needs not just 1.4 language compliance but e.g. also breaks on
> 1.4 -> 1.5 API changes or relies on something else that is specific only
> to 1.4.
>
> So seeing "Using: sun-jdk-1.5" is not a bug, note you also see the
> "Rewriting ./build.xml" that ensures proper -source and -target
> arguments. The problem could be if you have built something with 1.5
> before the migration - run java-1.5-fixer to fix that. But it is also
> possible that the build.xml file(s) weren't properly rewritten, some
> were ommitted... and that would be a bug. You just need to find out
> which package is causing that (probably some that will want to be
> rebuilt with java-1.5-fixer over and over again).
>   
Thank you for explanation. Now it's clear to me. I've discovered that
jaxme, aspectwerkz and subversion want to be rebuild over and over again:

# java-1.5-fixer
 * Generating a list of jars which ant uses
...                                                                                                                                                         
[ ok ]
 * Checking for > 1.4 bytecode in ant jars
...                                                                                                                                                          
[ ok ]
 * Generating a list of jars in the system
...                                                                                                                                                          
[ ok ]
 * Checking for > 1.4 bytecode in system jars
...                                                                                                                                                       
[ ok ]
 * Attempting to fix broken packages ...
 * Packages to fix this run:
=dev-java/aspectwerkz-2.0_rc2-r1 =dev-java/aspectwerkz-2.0_rc2-r1
=dev-java/aspectwerkz-2.0_rc2-r1 =dev-java/aspectwerkz-2.0_rc2-r1
=dev-java/jaxme-0.3.1-r1 =dev-java/jaxme-0.3.1-r1
=dev-java/jaxme-0.3.1-r1 =dev-java/jaxme-0.3.1-r1
=dev-java/jaxme-0.3.1-r1 =dev-java/jaxme-0.3.1-r1
=dev-util/subversion-1.3.2-r3
> Caster
>   

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