Compile IPerf 2.0.5 source for Android 5.0.2 with Position Independent compilation method

How can I compile IPerf 2.0.5 to generate Position Independent Executable for Android Lollipop 5.0? Can you also share more details on where to add compiler flags in make file of iperf 2.0.5 source code.

The Iperf Source code is found here.