Re: Fedora ? Java: The Death of Two SIGs

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On Mon, 27 Sept 2021 at 13:31, Richard W.M. Jones <rjones@xxxxxxxxxx> wrote:
>
> On Mon, Sep 27, 2021 at 12:15:32PM +0100, Mat Booth wrote:
> > On Mon, 27 Sept 2021 at 12:07, Richard W.M. Jones <rjones@xxxxxxxxxx> wrote:
> > >
> > > A question about this which is semi-related to your email.
> > >
> > > For some C library packages we have Java bindings, eg:
> > > https://github.com/libguestfs/libguestfs/tree/master/java
> > >
> > > These have been disabled in Fedora for ~2 years, but when they were
> > > around they had these BuildRequires:
> > >
> > >   BuildRequires: java-1.8.0-openjdk
> > >   BuildRequires: java-1.8.0-openjdk-devel
> > >   BuildRequires: jpackage-utils
> > >
> > > I believe the only requirements are javac, javah, javadoc (optional)
> > > and a JVM to run the tests on.
> > >
> > > Is it possible to keep this going, or would that require a lot of
> > > work?  I notice that javah no longer seems to exist.
> > >
> > > (Note I know almost nothing about how the modern JDK works)
> > >
> > > Rich.
> >
> > Hi, the functionality provided by javah has been folded into javac in
> > recent JDKs.
> >
> > These days you can make one call to "javac -h" instead of having to
> > call both "javac" and "javah"
> >
> > I ported quite a few packages this way when Fedora made the switch to
> > Java 11 by default. If you like I can probably take a look libguestfs
> > and send you a PR?
>
> Sure thing, thanks.
>
> However before you start you might also want to know that there are
> apparently some serious GC-related problems with how those bindings
> work:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1536762
>
> so it might be more of a saga than just changing a few commands.
>
> Rich.

Hi Rich,

TBH it looks like your Java bindings should build fine on Java 11
since this change:

https://github.com/libguestfs/libguestfs/commit/662dc5d0bf65e72dab11aa58d4bc373b5a3b7e75

>
> >
> > >
> > > --
> > > Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
> > > Read my programming and virtualization blog: http://rwmj.wordpress.com
> > > virt-p2v converts physical machines to virtual machines.  Boot with a
> > > live CD or over the network (PXE) and turn machines into KVM guests.
> > > http://libguestfs.org/virt-v2v
> > > _______________________________________________
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> > > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
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> >
> >
> >
> > --
> > Mat Booth
> > http://fedoraproject.org/get-fedora
> > _______________________________________________
> > devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx
> > To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
> > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> > List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
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>
> --
> Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
> Read my programming and virtualization blog: http://rwmj.wordpress.com
> virt-top is 'top' for virtual machines.  Tiny program with many
> powerful monitoring features, net stats, disk stats, logging, etc.
> http://people.redhat.com/~rjones/virt-top
> _______________________________________________
> devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx
> To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
> Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
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-- 
Mat Booth
http://fedoraproject.org/get-fedora
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