why qte2.3.1 can kill tty? how to solve it?

[gwhhwgy]

I have already cross compile qte2.3.1 for a ARM9 device.

now I write a little program:

#include <stdio.h>
#include <qapplication.h>
#include <qpushbutton.h>
#include <qlabel.h>
#include <qlistbox.h>
int main(int argc, char *argv[])
{
  printf("before qapp\n");
  QApplication app(argc,argv);
  printf("before label\n");
  QLabel *btn = new QLabel("Hello Qt!",0);
  printf("before conn\n");
 printf("before setmain\n");
  app.setMainWidget(btn);
  printf("before show\n");
  btn->show();
  printf("before exec\n");
  return app.exec();
  printf("after exec\n");
}

#include <stdio.h>
#include <qapplication.h>
#include <qpushbutton.h>
#include <qlabel.h>
#include <qlistbox.h>
int main(int argc, char *argv[])
{
  printf("before qapp\n");
  QApplication app(argc,argv);
  printf("before label\n");
  QLabel *btn = new QLabel("Hello Qt!",0);
  printf("before conn\n");
 printf("before setmain\n");
  app.setMainWidget(btn);
  printf("before show\n");
  btn->show();
  printf("before exec\n");
  return app.exec();
  printf("after exec\n");
}

To copy to clipboard, switch view to plain text mode 

I use minicom connect to the ARM9 device, then I typing: myApp -qws ENTER
the qt window can be display(through a TV),but only one line "before qapp" display on the minicom. and I can't type character into minicom anymore. Ctrl+C also can't work.

what's the reason? who can help me.