When I run biftool on CentOS 7, faced following errors:

/pub/production/_lib/bif/biftool: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by /pub/production/_lib/bif/biftool)
/pub/production/_lib/bif/biftool: /lib64/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by /pub/production/_lib/bif/biftool)
/pub/production/_lib/bif/biftool: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by /pub/production/_lib/bif/biftool)

Below commands are the easiest way can avoid above errors on CentOS 7 - note that you should run below in root.

wget https://repo.anaconda.com/archive/Anaconda3-2019.07-Linux-x86_64.sh
sh Anaconda3-2019.07-Linux-x86_64.sh
cp anaconda3/lib/libstdc++.so.6.0.26 /usr/lib64
rm -f /usr/lib64/libstdc++.so.6
ln -s /usr/lib64/libstdc++.so.6.0.26 /usr/lib64/libstdc++.so.6

If you want to uninstall Anaconda

conda install anaconda-clean

You may also need to remove anaconda on your root directory.