Requires GLIBCXX 3.4.32

[SoapSpangledGames]

I am trying to use Tree3D on Ubuntu 20.04, which has glibc 2.31, but the Tree3D Linux binaries are built against glib 3.4.32. Is there a way to get libraries compatible with Ubuntu 20.04?

[FibreFoX]

Ubuntu 20 LTS will drop support in 2025 (see https://ubuntu.com/about/release-cycle), so keep in mind that they will remove their support too in half a year.

Godot itself does not have any requirements to the used OS (see https://docs.godotengine.org/en/stable/about/system_requirements.html#desktop-or-laptop-pc-recommended):

Right now we use Ubuntu 24 for compiling the binaries (see

gdTree3D/Dockerfile

Line 1 in f34effd

FROM ubuntu:24.04

). I was not aware of such a problem, will check if this can be easily downgraded.

[FibreFoX]

Which Godot version are you using? @SoapSpangledGames

[FibreFoX]

Note to self: needs some more work than just switching to Ubuntu 20.04 inside the Dockerfile:

root@d75a78707437:/source# scons target=template_debug arch=x86_64
scons: Reading SConscript files ...
SCons 4.0 or greater required, but you have SCons 3.1.2

Will check if using PIP for installing SCons will help, and I will check if generated binaries still work with later glibc version. (I hate these version conflicts)

[SoapSpangledGames]

I'm using Godot 4.3. I am planning on building Tree3D myself in order to get the correct binaries for Ubuntu 20.04.

[SoapSpangledGames]

I downloaded SCons 4.8.1, so I think I will be able to build it.

[SoapSpangledGames]

It's building now.

[FibreFoX]

I've found an issue over at the Godot project regarding glibc, but they are discussion glibc 2.x stuff,: godotengine/godot#95182

Not sure if we need to supply special versions here, I would prefer to glibc 3, but it needs to be documented. I'm building the extension on my local machine too and will then push through all the test-devices I have.

[SoapSpangledGames]

The build completed, but I don't know what to do now. Since you're building, perhaps I should just wait for you to finish.

[FibreFoX]

Depending on how you've built it, look into the demo/addons/Tree3D directory, the binaries should be placed there. I will report back when I've found a proper way for having the binary working 😺

[SoapSpangledGames]

I built it with "scons target=template_release arch=x86_64 platform=linux", and I found it under demo/addons/Tree3D. However, I need to build the debug version.

[FibreFoX]

I am a bit puzzled, I have rechecked the build system, the glibc installed there is having glibc 2.39 installed:

root@a5ca9727583b:/source# /lib/x86_64-linux-gnu/libc.so.6
GNU C Library (Ubuntu GLIBC 2.39-0ubuntu8.3) stable release version 2.39.
Copyright (C) 2024 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 13.2.0.
libc ABIs: UNIQUE IFUNC ABSOLUTE
Minimum supported kernel: 3.2.0
For bug reporting instructions, please see:
<https://bugs.launchpad.net/ubuntu/+source/glibc/+bugs>.

When switching to Ubuntu 20.04 it states the following:

root@3bdb336af230:/source# /lib/x86_64-linux-gnu/lib
libc-2.31.so        libc.so.6           libfakeroot/        libpthread-2.31.so  libpthread.so       libpthread.so.0
root@3bdb336af230:/source# /lib/x86_64-linux-gnu/libc.so.6
GNU C Library (Ubuntu GLIBC 2.31-0ubuntu9.16) stable release version 2.31.
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 9.4.0.
libc ABIs: UNIQUE IFUNC ABSOLUTE
For bug reporting instructions, please see:
<https://bugs.launchpad.net/ubuntu/+source/glibc/+bugs>.

Can you show me, what lib the .so file is showing to on your system?
ldd demo/addons/Tree3D/libTree3D.linux.template_debug.x86_64.so

How did you get the information about glibc 3.4.32 ?

[SoapSpangledGames]

Woohoo! It worked! I have a default tree in my scene now:

[SoapSpangledGames]

ldd libTree3D.linux.template_debug.x86_64.so

linux-vdso.so.1 (0x00007ffcdd0eb000)
libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f406a6cf000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f406a57f000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f406a387000)
/lib64/ld-linux-x86-64.so.2 (0x00007f406a9af000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f406a367000)

[FibreFoX]

I am looking back to the original report: #2 (comment)

Can you please change the title of this issue to Requires GLIBCXX 3.4.32 please? Because that's a different library ;)

Just to make sure, can you post me which version it is (ls -althr /lib/x86_64-linux-gnu/libstdc++.so.6) ?

EDIT:
Can you post what versions your system supports?

strings /lib/x86_64-linux-gnu/libstdc++.so.6  | grep GLIBCXX