qt designer 에서 qthread질문 다시 올립니다..

안녕하세요..

얼마전에 qt designer 에서 qthread에 관해서 질문을 올렸었는데요...

다른 에러가 생겨서 다시 한번 올립니다...

우선 버튼 입력을 받아서 쓰레드가 진행되는 프로그램을 짧게 구현 했습니다..

풀 소스는 다음과 같습니다...

////serial.h///////

#ifndef SERIAL_H
#define SERIAL_H

#include <qvariant.h>
#include <qdialog.h>
#include "thread.h"

class QVBoxLayout;
class QHBoxLayout;
class QGridLayout;
class QPushButton;

class serial : public QDialog
{
    Q_OBJECT

public:
    serial( QWidget* parent = 0, const char* name = 0, bool modal = FALSE, WFlags fl = 0 );
    ~serial();

    QPushButton* StartButton;

public slots:
    virtual void Start();

protected:

protected slots:
    virtual void languageChange();

private:
    Thread thread;
    
private slots:
    virtual void startThread();

};

#endif // SERIAL_H

////serial.ui.h///////

#include "serial.h"

void serial::Start()
{
    startThread();
}


void serial::startThread()
{
    if(thread.running())
    {
	thread.stop();
    }
    else
    {
	thread.start();
    }
}

////serial.cpp///////

#include "serial.h"
#include "thread.h"

#include <qvariant.h>
#include <qpushbutton.h>
#include <qlayout.h>
#include <qtooltip.h>
#include <qwhatsthis.h>
#include <qimage.h>
#include <qpixmap.h>

#include "serial.ui.h"
/* 
 *  Constructs a serial as a child of 'parent', with the 
 *  name 'name' and widget flags set to 'f'.
 *
 *  The dialog will by default be modeless, unless you set 'modal' to
 *  TRUE to construct a modal dialog.
 */
serial::serial( QWidget* parent, const char* name, bool modal, WFlags fl )
    : QDialog( parent, name, modal, fl )

{
    if ( !name )
	setName( "serial" );

    StartButton = new QPushButton( this, "StartButton" );
    StartButton->setGeometry( QRect( 340, 310, 95, 29 ) );
    languageChange();
    resize( QSize(600, 480).expandedTo(minimumSizeHint()) );

    // signals and slots connections
    connect( StartButton, SIGNAL( clicked() ), this, SLOT( Start() ) );
}

/*
 *  Destroys the object and frees any allocated resources
 */
serial::~serial()
{
    // no need to delete child widgets, Qt does it all for us
}

/*
 *  Sets the strings of the subwidgets using the current
 *  language.
 */
void serial::languageChange()
{
    setCaption( tr( "Form1" ) );
    StartButton->setText( tr( "Start" ) );
}

///////thread.h//////

#ifndef THREAD_H
#define THREAD_H

#include <qthread.h>

class Thread : public QThread
{
public:
    Thread();
	
    virtual void run();
     
private:
     
};
#endif // THREAD_H

///////thread.cpp//////

#include "thread.h"

Thread::Thread()
{
}

void Thread::run()
{
}

//////main.cpp//////

#include <qapplication.h>
#include "serial.h"
#include "thread.h"

int main( int argc, char ** argv )
{
    QApplication a( argc, argv );
    serial w;
    w.show();
    a.connect( &a, SIGNAL( lastWindowClosed() ), &a, SLOT( quit() ) );
    return a.exec();
}

위의 코드와 같습니다...

그런데 make컴파일 시키니까

.ui/serial.h:39: 'Thread' is used as a type, but is not defined as a type.

serial.ui.h: In member function `virtual void serial::startThread()':

serial.ui.h:19: `thread' undeclared (first use this function)
serial.ui.h:19: (Each undeclared identifier is reported only once for each
   function it appears in.)

make: *** [.obj/serial.o] 오류 1

위와 같은 오류가 나는데....

Thread와 thread가 정의 되어 있지 않다고 나오네요...

정의가 왜 되어 있지 않은지 감이 안오네요...ㅡㅡ

Makefile에
cxxflag에 -DQT_THREAD_SUPPORT 추가 되어있고...

그리고 .pro 파일에 thread를 추가했습니다....

고수님들의 답변 부탁드리겠습니다...