ok, I've done it, add library 'librt.so.1' in 'wpa_gui.pro', in my case it looks this like:
LIBS += /home/dev/ti-sdk-am335x-evm-06.00.00.00/linux-devkit/sysroots/armv7ahf-vfp-neon-3.2-oe-linux-gnueabi/lib/librt.so.1
although wpa-gui-a from TI SDK 06.00.00.00 launches fine on platform, my new one compilation show on screen:
"Could not get status from wpa supplicant"
Seems GUI from SDK is different from compiled from sources,
Any help - very welcome
Thanks a lot,
Vasiliy