GLIBCXX_3.4.21 not defined in file libstdc++.so.6 with link time reference

Question

Apologies, I understand questions very similar to this have been asked relatively often, although none of the solutions seem to work for me.When attempting to run any c++ code o

Answer 1

update libstdc++6 download link to:

http://security.ubuntu.com/ubuntu/pool/main/g/gcc-5/libstdc++6_5.4.0-6ubuntu1~16.04.12_amd64.deb