Re: [gentoo-alt] Using Gentoo Prefix to support a more recent version of Eclipse?

[Rabbe Fogelholm]

Konstantin Tokarev wrote:
>
>
> 20.08.2020, 10:52, "Rabbe Fogelholm" <rabbe@×××××××.se>:
>> Fabian Groffen wrote:
>>>   On 19-08-2020 22:52:38 +0200, Rabbe Fogelholm wrote:
>>>>   Thanks Benda for encouragement.
>>>>
>>>>   The bootstrapping was a breeze. I started it off and it finished in a couple of
>>>>   hours.
>>>>
>>>>   Emerging 'meld', another GTK application, was possible after adding some
>>>>   masks and USE flags.
>>>>
>>>>   With Java, no success yet. I am trying to use a LD_LIBRARY_PATH, but
>>>>   that causes Java to crash immediately. Maybe this is just not doable.
>>>
>>>   The Oracle SDKs (that are masked nowadays) always worked like a charm
>>>   for me. Perhaps you can use those?
>>
>> My understanding of the Eclipse problem is really limited. That said,
>> I think that Eclipse uses some framework named SWT, for the GUI. SWT
>> is somehow part of Java. And SWT uses GTK.
>
> SWT is not a part of Java (unlike Swing), it's an independent project (dev-java/swt)

Interesting! I tried building dev-java/swt, which succeeded. But then I
had problems. Very briefly I noticed this,

- not possible to mask oracle-jdk-bin-11, I finally removed the -11 ebuild file
from portage and ran
ebuild oracle-jdk-bin-1.8.0.202.ebuild digest

- the oracle-jdk-bin-8 does not emerge cleanly, it ends up with this warning:
QA Notice: Symbolic link /repo/zfograb/g2/usr/lib/jvm/oracle-jdk-bin-1.8 points to /opt/oracle-jdk-bin-1.8.0.202 which does not exist.
The link should probably point to /repo/zfograb/g2/opt/oracle-jdk-bin-1.8.0.202.
Having fixed this, and running eselect java-vm set system 1, I could finally
invoke Oracle Java 8 in the prefix.

But, no luck with Eclipse. It crashes just the same. Since it is not built
from source it may be that it uses the Ubuntu 16 SWT and fails.

--Rabbe

>
>>
>> So I tried to do a source build of Java in the prefix, hoping that SWT
>> would then use the up-to-date GTK in the prefix. I went for OpenJDK 11.
>> In the end this failed because net-print/cups is pulled in, and that
>> ebuild fails because it tries to install files outside the prefix.
>>
>> I tried putting -cups in make.conf and in other places, but the cups
>> dependency seems unavoidable.
>>
>> --Rabbe
>>
>>>   Fabian
>>>>   BR and thanks / Rabbe
>>>>
>>>>   Benda Xu wrote:
>>>>>   Hi Rabbe,
>>>>>
>>>>>   Rabbe Fogelholm <rabbe@×××××××.se> writes:
>>>>>
>>>>>>   I have a situation where Gentoo Prefix may possibly help.
>>>>>>
>>>>>>   I want to run Eclipse with a plugin for Erlang development. The plugin
>>>>>>   requires me to use a recent version of Eclipse. However, the platform
>>>>>>   that I am stuck with is Ubuntu 16.04.6 LTS, which has an old GTK 3
>>>>>>   version, which would force me to use Eclipse "Oxygen", not compatible
>>>>>>   with the Erlang plugin.
>>>>>>
>>>>>>   So, I am wondering: If I can get Gentoo Prefix set up, with presumably
>>>>>>   an up-to-date version of GTK 3, could I then hope that this Eclipse
>>>>>>   can find the newer GTK 3 and run happily?
>>>>>   Yes, Gentoo Prefix will help. That said, it might not work out of the
>>>>>   box. I don't know anyone who is using Eclipse on Gentoo Prefix.
>>>>>
>>>>>   You can expect bugs along your way to the destiny. And that's a good
>>>>>   way to contribute to Prefix by sharing your findings and solutions
>>>>>   through the bugzilla.
>>>>>
>>>>>   Yours,
>>>>>   Benda
>
>
> --
> Regards,
> Konstantin
>