'xeus C++11' kernel not appear in the jupyter notebook menu. about xeus-cling HOT 16 CLOSED

I do not see any C++ options when running jupyter-notebook with google chrome. Everything seems to work. I activate the (xeus-cling) environment and launch jupyter-notebook.

#217 Fixed my issue. Sorry for the duplicate.
conda install xeus-cling notebook -c QuantStack -c conda-forge

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More info:

root@7bac7e6baf53:~/.jupyter# jupyter kernelspec list
Available kernels:
  python3    /root/miniconda3/share/jupyter/kernels/python3
  python2    /usr/local/share/jupyter/kernels/python2
root@7bac7e6baf53:~/.jupyter# which jupyter
/root/miniconda3/bin/jupyter
root@7bac7e6baf53:~/.jupyter# source activate cling
(cling) root@7bac7e6baf53:~/.jupyter# which jupyter
/root/miniconda3/bin/jupyter
(cling) root@7bac7e6baf53:~/.jupyter# jupyter kernelspec list
Available kernels:
  python3    /root/miniconda3/share/jupyter/kernels/python3
  python2    /usr/local/share/jupyter/kernels/python2
(cling) root@7bac7e6baf53:~/.jupyter#

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The kernel specs appear to be installed in cling environment. Can you try launching notebook from an activated cling environment?

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It's the same. I think it is because there is a jupyter notebook on my system before install conda. I am going to install on a clear docker image. I will feedback later. Thanks.

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I reinstalled on ubuntu and centos docker image but meet the error: "post-link script failed for package QuantStack::gcc-7-7.2.0-1".
I finally installed on MAC os and it run.

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The post-link issue is something that has been reported earlier and which we are not reproducing locally.

In fact we only depend on gcc's STL so we should remove the faulty postlink check fron the recipe as a workaround.

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Dear @SylvainCorlay, I'm facing this post-link issue while trying to deploy a xtensor notebook from quantstack repo using mybinder.org. In order to reproduce it, one could deploy a new jupyter server for xtensor repo through mybinder.org. I hope this may help in reproducing the post-link issue.

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@aforechi I am not sure I understand. Do you have a local deployment of mybinder ?

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No. I refer to https://mybinder.org. There one can easily deploy jupyter notebook servers just by filling a form with a github repo such as for xtensor. By doing so we'll get the following link. Following the link you can read the post-link error messages.

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I can see that the master branch of xtensor triggers that issue on binder! Good that there is a situation where we can reproduce this.

Note that you can use 0.15.9 on binder without issue. Just click on the binder links in xtensor's readme.

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Great @SylvainCorlay! Actually, I'm facing the same issue but with my own repo, which I use for teaching C++ programming. I must thank you all at QuantStack for making this more interesting! I referred earlier to the xtensor repo because the issue might be correlated. Cheers!

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@aforechi OK, I think I might have a fix. Stay tuned.

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This is fixed now!

I am closing the issue but don't hesitate to comment here should you have the issue again and I will reopen.

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Hi.

Could this issue not be closed until we know at least which version of gcc must be installed?

If that is indeed the issue - and not "I installed jupyter before I installed conda" if that is the issue?

By the way The "I installed jupyter" issue stems from having met some people who wanted to use Jupyter without using conda. And if that is the issue, then it would be good to inform people about this.

Thanks!

Thanks

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