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https://issues.apache.org/jira/browse/LUCENE-9767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17284010#comment-17284010
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Dawid Weiss commented on LUCENE-9767:
-------------------------------------

I've tried on my local (old-ish) ubuntu, I get this:
{code}
dweiss@:~/tmp/icu$ ./usr/local/sbin/gennorm2
./usr/local/sbin/gennorm2: error while loading shared libraries: 
libicutu.so.68: cannot open shared object file: No such file or directory
{code}
and when I set LD_LIBRARY_PATH:
{code}
export LD_LIBRARY_PATH=/home/dweiss/tmp/icu/usr/local/$LD_LIBRARY_PATH
dweiss@:~/tmp/icu$ ./usr/local/sbin/gennorm2
./usr/local/sbin/gennorm2: /lib/x86_64-linux-gnu/libm.so.6: version 
`GLIBC_2.29' not found (required by 
/home/dweiss/tmp/icu/usr/local/lib/libicuuc.so.68)
{code}

So yeah... perhaps better to compile from sources in *nix systems.

> port ICU regeneration to gradle build
> -------------------------------------
>
>                 Key: LUCENE-9767
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9767
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Robert Muir
>            Priority: Major
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> When we upgrade ICU dependency we have to regenerate a lot of stuff. The ant 
> build has it all automated.
> You do need icu4c installed corresponding to the icu4j version to regenerate 
> some of the datastructures. There are also some java regenerators that do 
> processing of unicode data and so on.
> Will try to see if I can get this hobbling when I have the time, the icu 
> dependency is quite old at this point. The hard part for me is learning 
> gradle's crazy ways every time, but maybe i can start it off super-ugly with 
> something like shell script that everyone hates, but at least works 
> correctly. 
> cc [~dweiss]



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