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eccerr0r
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 Posted: Tue Oct 31, 2023 4:09 pm Post subject: jdk/jre icedtea confusion with packages that want any jre? |
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I installed dev-java/icedtea-bin-3.16.0 for using out-of-portage mkgmap and it installed virtual/jre-1.8.0-r3 and virtual/jdk-1.8.0-r6 as it should.
I subsequently installed sci-geosciences/josm-bin (source code has apache license btw, but nevermind that as this is a bytecode compiled java program) which has the requirement of >=virtual/jre-1.8 which icedtea-bin satisfies so I didn't see anything strange going on.
However now if I do a world update, it notices that it wants >=virtual/jre-1.8 so ... hey, virtual/jre-17 meets this requirement and is stable, but there is no icedtea that fits this. Therefore it unneedingly wants to install openjdk-17 along with leaving icedtea alone. For me, having both JRE's is redundant -- one or the other is enough.
So is icedtea becoming deprecated and we should be using openjdk, or will I have to add a manual mask to block out >virtual/jre-2 so virtual/jre-1.8 will remain being the main and active JRE, and stop installing the redundant openjdk-17?
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fedeliallalinea
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| Posted: Tue Oct 31, 2023 5:35 pm Post subject: |
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IcedTea support only java 8, if you want jre-17 you should install openjdk or openjdk-bin.
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eccerr0r
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| Posted: Tue Oct 31, 2023 6:09 pm Post subject: |
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I guess it's also a "if it works don't fix it" ... mkgmap and josm seem to work fine with java8/icedtea. I suppose the proper solution really is to just upgrade to openjdk 17 and hope things just work?
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fedeliallalinea
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| Posted: Tue Oct 31, 2023 6:20 pm Post subject: |
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Usually backward compatibility works with java.
So if you use a new virtual machine you can run code compiled with older jdk, not vice versa.
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eccerr0r
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| Posted: Tue Oct 31, 2023 9:12 pm Post subject: |
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hmm... probably should go ahead and try a new jre and ditch icedtea... now why has icedtea been kept so long if the new JREs can run old bytecode just fine...?
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fedeliallalinea
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| Posted: Wed Nov 01, 2023 8:34 am Post subject: |
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I think it is related to the fact that back in the day, although released open source the code, some components were proprietary like JavaWebStart or sound support.
This did not allow the software to be compiled with other open source software, so IcedTea implements these parts with dev-java/icedtea-web and dev-java/icedtea-sound.
Over time these problems were solved (JavaWebStart is deprecated) and today OpenJDK is released under GPL-2 with classpath exception.
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logrusx
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| Posted: Wed Nov 01, 2023 10:06 am Post subject: |
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emerge --deselect icedtea-bin should solve your issue.
ARAIR icedtea is a build bootstrapped completely with free software, because at that time there were some proprietary parts of JDK. I think we won't see another release of icedtea as AFAIK all parts of jdk are now open source.
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eccerr0r
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| Posted: Thu Nov 02, 2023 8:14 am Post subject: |
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Might just be time to ditch icedtea then...
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logrusx
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| Posted: Thu Nov 02, 2023 9:25 am Post subject: |
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| eccerr0r wrote: | | Might just be time to ditch icedtea then... |
I might have mislead you, I see the github repo is alive and well. They are currently working on IcedTea-16 which supports Java 21. I'm not sure what Gentoo Java team thinks about the future of icedtea in Gentoo, maybe ask them in #gentoo-java@Libera.Chat.
However I'm pretty sure everything you need can be done by openjdk-bin.
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Georgi |
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eccerr0r
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| Posted: Thu Nov 02, 2023 2:24 pm Post subject: |
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what the heck... now what's the value proposition of icedtea...
I thought I chose icedtea way back because it was mostly OSS. Now what are they doing if openjdk is likewise ...
I ended up flipping to openjdk-17 on one machine and fortunately things are still working,..
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logrusx
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| Posted: Thu Nov 02, 2023 2:51 pm Post subject: |
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| eccerr0r wrote: | what the heck... now what's the value proposition of icedtea...
I thought I chose icedtea way back because it was mostly OSS. Now what are they doing if openjdk is likewise ...
I ended up flipping to openjdk-17 on one machine and fortunately things are still working,.. |
According to Wikipedia it provides some stuff others don't, but that information is outdated. I'm pretty sure you would know if you needed something that the others don't have.
Best Regards,
Georgi |
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fedeliallalinea
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| Posted: Thu Nov 02, 2023 3:47 pm Post subject: |
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| eccerr0r wrote: | | I ended up flipping to openjdk-17 on one machine and fortunately things are still working,.. |
It is not luck as mentioned the java vm can execute bytecode compiled with versions of java less than or equal to its version.
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eccerr0r
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| Posted: Thu Nov 02, 2023 6:41 pm Post subject: |
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As with any upgrade there's always a chance of breaking something, maybe not so with javavm, but emerge definitely can break stuff :)
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logrusx
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| Posted: Fri Nov 03, 2023 6:21 am Post subject: |
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| fedeliallalinea wrote: | | eccerr0r wrote: | | I ended up flipping to openjdk-17 on one machine and fortunately things are still working,.. |
It is not luck as mentioned the java vm can execute bytecode compiled with versions of java less than or equal to its version. |
That's not completely correct. While it holds true for the bytecode itself, libraries change, things get deprecated and removed and quite a lot is gone between Java 8 and 17.
Best Regards,
Georgi |
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