QT5.2 has no special dependencies. I have built it on platforms back to 11 with no problem. In fact, it has been successfully compiled and ported on platforms like raspberry pi with minimal problems. Here is a list of build requirements:
Git (>= 1.6.x) Perl (>=5.14) Python (>=2.6.x)
Libxcb
There are even helper compilation libraries for 11.
You can find all the information at: http://qt-project.org/wiki/Building_Qt_5_from_Git