python3: Relink `/lib/x86_64-linux-gnu/libsystemd.so.0' with `/lib/x86_64-linux-gnu/librt.so.1' for IFUNC symbol `clock_gettime'

Our environment is below. OS: Ubuntu18.0.4 Python:Python 3.6.9 tensorflow: tensorflow-gpu 2.0.0 roboschool: roboschool-1.0.49

We execute this command on tf2rl.

pip3 install . --user

and then

python3 run_ddpg.py

We receive this error.

python3: Relink `/lib/x86_64-linux-gnu/libsystemd.so.0' with `/lib/x86_64-linux-gnu/librt.so.1' for IFUNC symbol `clock_gettime'
python3: Relink `/lib/x86_64-linux-gnu/libudev.so.1' with `/lib/x86_64-linux-gnu/librt.so.1' for IFUNC symbol `clock_gettime'
Segmentation fault (core dumped)

How do I fix?

[AndreasLuckert]

Please, let me confirm. Do you still think that your problem comes from tf2rl?

No, I haven’t had any idea what might be the cause.

Never do that. I don’t think link means symbolic link but a job of linker (e.g. ld). You’re completely right, I wasn’t going to actually do that, but wanted to hypothesize something similar to what could be a viable approach, if there is any.

To sum up, thanks for your hints and tipps. I’m hoping for further help under my issue posted on the jupyter qtconsole GitHub-page. If anyone reading this knows the answer, feel free to let me know 😃

[ymd-h]

@AndreasLuckert

Please, let me confirm. Do you still think that your problem comes from tf2rl? I think your Qt installation is broken (and your problem is different problem from the original topic of this issue).

Qt is a GUI library and t2rl developers don’t know detail. (We don’t develop any GUI applications.)

ln -s /usr/lib/x86_64-linux-gnu/libQtCore.so.4 /lib/x86_64-linux-gnu/librt.so.1

Never do that. I don’t think link means symbolic link but a job of linker (e.g. ld).