Segmentation fault while creating Object for QApplication

[nrabara]

I have been using qt for embedded linux 4.5 on Embedded(arm) platform. While running simple qt application I got segmentation fault. I traced out and found that while creating object for QApplication its shows segmentation fault.(I have installed shared Lib at right location)
Below is my code..

int main(int argc, char * argv[])
{
   printf("Inside main\n");
    [B]QApplication app(argc, argv);[/B]    // Got error here
   printf("object created \n");
    Widget w;
    w.show();
    app.exec();
 
}
 
./my
Inside main
Segmentation fault

int main(int argc, char * argv[])
{
   printf("Inside main\n");
    [B]QApplication app(argc, argv);[/B]    // Got error here
   printf("object created \n");
    Widget w;
    w.show();
    app.exec();

}

./my
Inside main
Segmentation fault

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But I am able to create Object for QCoreApplication

int main(int argc, char * argv[])
{
   printf("Inside main\n");
    [B]QCoreApplication app(argc, argv);[/B]   
   printf("object created \n");
   a.arguments(); 
    a.flush();
 
}
 
./my
Inside main
object created

int main(int argc, char * argv[])
{
   printf("Inside main\n");
    [B]QCoreApplication app(argc, argv);[/B]   
   printf("object created \n");
   a.arguments(); 
    a.flush();

}

./my
Inside main
object created

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I don't understand why its not creating object for QApplication??
What is going wrong??
I am not able to find the reason, can anybody help me out??