version GLIBCXX_3.4.21 not defined in file libstdc++.so.6 with link time reference
在python中运行如下:
$ python
>>> import wx
输出：symbol _ZNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEE5eraseEmm, version GLIBCXX_3.4.21 not defined in file libstdc++.so.6 with link time reference。