c++ - no graphics visible on LCD on running qt application -

i trying cross compile , run qt application on arm board has lcd connected it. used below code , cross compiled arm. when run application executes no graphics visible on lcd. can me. need export something.

#include <qapplication> #include <qpushbutton>  int main(int argc, char *argv[]) {    qapplication app(argc, argv);     qpushbutton hello("hello world!");     hello.show();    return app.exec(); } 

i have done project "rfid based authorization system" had run qt application on lcd interfaced raspberry pi (arm board).

please provide more information can of more you.

make sure had done:

1. correct qt package (qt on arm embedded system)
2. every time port program intel (your computer) arm based, need configure project on qt creator.
3. make sure graphics environment enabled on arm board working. default, command line interface enabled on arm board , need enable gui separately.