In order to run qt applications in WEGA-AM335x follow below procedure.

Regarding "qmake", you don't need to ptxdist build compile system for qmake, just download and extract qt-cross-hf.tar.bz2 
in "/opt" folder in your PC or Laptop. 

Eg :
	$ cd /opt
	$ sudo tar -xvf qt-cross-hf.tar.bz2

Give the path of "qmake" which is in bin folder.