QT 처음사용해보는 초보입니다 이게 왜이런건지...

아예 다 에러가 나네요

hello.cpp:1:26: error: qapplication.h: 그런 파일이나 디렉토리가 없음
hello.cpp:3:20: error: qlabel.h: 그런 파일이나 디렉토리가 없음
hello.cpp: In function ‘int main(int, char**)’:
hello.cpp:11: error: ‘QApplication’ was not declared in this scope
hello.cpp:11: error: expected `;' before ‘app’
hello.cpp:13: error: ‘QLabel’ was not declared in this scope
hello.cpp:13: error: ‘hello’ was not declared in this scope
hello.cpp:13: error: expected type-specifier before ‘QLabel’
hello.cpp:13: error: expected `;' before ‘QLabel’
hello.cpp:17: error: ‘app’ was not declared in this scope
[root@jsydev NewPVViewer]# gcc -c hello.cpp -l$QTDIR/include
hello.cpp:1:26: error: qapplication.h: 그런 파일이나 디렉토리가 없음
hello.cpp:3:20: error: qlabel.h: 그런 파일이나 디렉토리가 없음
hello.cpp: In function ‘int main(int, char**)’:
hello.cpp:11: error: ‘QApplication’ was not declared in this scope
hello.cpp:11: error: expected `;' before ‘app’
hello.cpp:13: error: ‘QLabel’ was not declared in this scope
hello.cpp:13: error: ‘hello’ was not declared in this scope
hello.cpp:13: error: expected type-specifier before ‘QLabel’
hello.cpp:13: error: expected `;' before ‘QLabel’
hello.cpp:17: error: ‘app’ was not declared in this scope

지금 인턴으로 뷰어(이미 만들어져있는걸 소스만 조금 바꿔서 업데이트하는작업) 을 개발 하고 있는데 줄마다 에러가 떠서 걍 기초적인 걸 시험삼아 컴파일 시켜봤는데 이것도 마찬가지이네요

os는 페도라 리눅스 7.0이고요 큐티 버전은 QT4 4.3.2.
이네여 참고삼으시라고 제가 한 기초적인 소스도 올려봅니다.

#include

#include

int main( int argc, char **argv )

{

QApplication app( argc, argv );

QLabel *hello = new QLabel( "Hello Qt!"

"", 0 );

app.setMainWidget( hello );

hello->show();

return app.exec();

}
~