Today while I was updating py27-m2crypto package on FreeBSD 10 using portmaster, the following error message was displayed:

Shared object "libstdc++.so.6" not found, required by "swig"

Fortunately, someone else has found the problem and solution before me. According this blog post, FreeBSD 10 includes a new C++ stack and gcc, including libstdc++, is not installed by default.

Therefore, to fix the missing this libstdc++.so.6 issue, we need to install lang/gcc.

If you use portmaster, the command to install lang/gcc is:

# portmaster lang/gcc

Credit: http://www.laszlopusztai.net/2014/01/26/running-perforce-on-freebsd-10/