Jupyter does not start after installing gcc package

[j0r1]

I've just installed Anaconda 5.0.1 for Linux x64, Python 3.6. When I run jupyter notebook everythings works fine. After I install the gcc package however (resolves to 4.8.5-7), jupyter no longer starts and I get the error:

Traceback (most recent call last):
  File "/home/jori/anaconda3-501/bin/jupyter-notebook", line 7, in <module>
    from notebook.notebookapp import main
  File "/home/jori/anaconda3-501/lib/python3.6/site-packages/notebook/notebookapp.py", line 39, in <module>
    from zmq.eventloop import ioloop
  File "/home/jori/anaconda3-501/lib/python3.6/site-packages/zmq/__init__.py", line 34, in <module>
    from zmq import backend
  File "/home/jori/anaconda3-501/lib/python3.6/site-packages/zmq/backend/__init__.py", line 40, in <module>
    reraise(*exc_info)
  File "/home/jori/anaconda3-501/lib/python3.6/site-packages/zmq/utils/sixcerpt.py", line 34, in reraise
    raise value
  File "/home/jori/anaconda3-501/lib/python3.6/site-packages/zmq/backend/__init__.py", line 27, in <module>
    _ns = select_backend(first)
  File "/home/jori/anaconda3-501/lib/python3.6/site-packages/zmq/backend/select.py", line 26, in select_backend
    mod = __import__(name, fromlist=public_api)
  File "/home/jori/anaconda3-501/lib/python3.6/site-packages/zmq/backend/cython/__init__.py", line 6, in <module>
    from . import (constants, error, message, context,
ImportError: /home/jori/anaconda3-501/lib/python3.6/site-packages/zmq/backend/cython/../../../../.././libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by /home/jori/anaconda3-501/lib/python3.6/sitepackages/zmq/backend/cython/../../../../../libzmq.so.5.1.2)

From a listing of libstdc++ libs:

-rw-rw-r-- 2 jori users 2943678 Nov 15  2016 libstdc++.a
-rwxrwxr-x 2 jori users 1055192 Nov 15  2016 libstdc++.so.6.0.19*
-rwxr-xr-x 2 jori users 8188008 Oct  6 06:05 libstdc++.so.6.0.24*
-rw-rw-r-- 1 jori users    2339 Feb  9 20:32 libstdc++.so.6.0.19-gdb.py
lrwxrwxrwx 1 jori users      19 Feb  9 20:32 libstdc++.so.6 -> libstdc++.so.6.0.19*
lrwxrwxrwx 1 jori users      19 Feb  9 20:32 libstdc++.so -> libstdc++.so.6.0.19*

It seems that after installing the gcc package, libstdc++.so now is a link to an older version without GLIBCXX_3.4.20.

After removing the gcc package again, it still didn't work but it seemed that now the ImportError pointed to one of my system libraries, not one of anaconda. A file listing of the libstdc++ libs now only shows

-rwxr-xr-x 2 jori users 8188008 Oct  6 06:05 libstdc++.so.6.0.24*

i.e., the symbolic links no longer exist. After restoring the symbolic links, jupyter starts again without problems.

[jjhelmus]

The gcc package has been replaced by the gcc_linux-64 package. Try removing gcc and installing gcc_linux-64. It may be necessary to reinstall libstdcxx-ng to restore libstdc++ to its original version.

[j0r1]

That indeed solves it, thanks!