libstdc++.so.6: version `GLIBCXX_3.4.20' not found

[hyOzd]

I've installed CAMotics via this debian package on Linux Mint 17.3 . When I run camotics I get this error in the command line:

camotics: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by camotics)

I have this version of libstdc++6 package installed:

4.8.4-2ubuntu1~14.04.1

[jcoffland]

You need at least libstdc++.so.6.0.20 for GLIBCXX_3.4.20 support. This library is provided by libstdc++6 v4.9.0. Since you have v4.8.4 you are one minor version behind. v4.8.4 provides C++ ABI support only up to GLIBCXX_3.4.19.

[jcoffland]

As a work around you could either try running the Ubuntu package or building from source.

[hyOzd]

Hmm, thanks for info. I think it would be good idea to add this dependency into the debian package.

[jcoffland]

Good point. Even better would be to get CAMotics in to Debian. I've been hoping to find someone to help me with this.

[jcoffland]

Here's a solution for this problem in Ubuntu/Mint:

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-4.9
sudo apt-get upgrade libstdc++6

You can check if you have GLIBCXX_3.4.20 like this:

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

[chenz16]

The following solution works for me:

Follow these steps to solve the issue:

go to the right location and backup your current anaconda2 shortcut (change its name so it isn't overwritten):

cd ~/anaconda2/lib
mv -vf libstdc++.so.6 libstdc++.so.6.old

create a new shortcut using the ln command (I am assuming that I am in the previous location ~/anaconda2/lib):

ln -s /usr/lib/x86_64-linux-gnu/libstdc++.so.6 ./libstdc++.so.6

restart spyder / other interface you use

---

replace anaconda2 with anaconda or anaconda3 as needed.

[jcoffland]

v1.2.0 now requires GLIBCXX_3.4.21 so this issue will not be fixed. The only viable solution is to get a CAMotics source package accepted into Debian.