Error loading shared library after upgrade to Kubuntu 25.04

[Jan-Pieter Jacobs]

Hi, I just wanted to report a problem I got recently.

After an upgrade from Kubuntu 24.10 to 25.04, I got the following error message:

"Load library ~/j9.7/bin/libj.so failed: ~/j9.7/bin/libj.so: cannot enable executable stack as shared object requires: Invalid argument"

_james_ on the #jsoftware IRC channel kindly pointed me to the solution:

install execstack, and do: execstack -c ~/j9.7/bin/libj.so

I have absolutely no clue what this performs, or what exactly triggers the problem, but now J works again. I added a note on the wiki to this end on the j9.7 installation page though I don't know if it's the right place and whether it's a problem that will be solved in the next release, or a bug in Kubuntu ... feel free to correct.

Best regards,

Jan-Pieter

[Norman Drinkwater]

This problem is related to glibc 2.41. I think it will be fixed in the next beta. In the meantime, if you run execstack -c path/to/libj.so it should fix the problem. Google glibc 2.41 execstack for further details.

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[Norman Drinkwater]

Woops, sorry didn’t read to the end before replying!

[Pascal Jasmin]

execstack -c did not seem to fix problem for j9.7 or j9.6 for me.

usr/lib/paxtest/execstack -c ~/j9.6/bin/libj.so
Executable stack                         : Killed

though paxtest may be a different program that just used the same name.  All arguments to program return the same line above

execstack has been removed from direct debian repositories for a few years now.

[Pascal Jasmin]

was indeed wrong execstack.  Right one at  https://ftp.debian.org/debian/pool/main/p/prelink/

though to run jqt, execstack -c command had to be repeated.