STLPort using C++11

I'm trying to migrate my office code from C++ to C++11 and we make heavy use of STLPorts.

There's a compiler macro (http://www.stlport.org/doc/configure.html) - _STLP_LONG_LONG, which is used in our code and works fine in C++.

However, in C++ 11, this is not defined.

#defined (_STLP_LONG_LONG)
// Doesn't come here

How can I fix this? I tried searching on the internet but the resources are very limited.