undefined symbol, link problem. Please help

[Gride]

EDIT: fixed, thanks for help.

I get this when I try to make the project.
Errors caused tool to abort.
Link Error : Undefined symbol: 'CMyCompoundClass::CMyCompoundClass(void) (??0CMyCompoundClass@@QAE@XZ)'
Link Error : referenced from 'class CMyCompoundClass * CMyCompoundClass::NewL(void) (?NewL@CMyCompoundClass@@SAPAV1@XZ)' in CMyCompoundClass.cpp:19
Link Error : Undefined symbol: 'CMySimpleClass::CMySimpleClass(void) (??0CMySimpleClass@@QAE@XZ)'
Link Error : referenced from 'class CMySimpleClass * CMySimpleClass::NewL(void) (?NewL@CMySimpleClass@@SAPAV1@XZ)' in CMySimpleClass.cpp:17
Link Error : Link failed

I found some answers to this problem but still dont know how to fix it, so if someone could help.

My code is following:

#include "CMySimpleClass.h"
void CMySimpleClass::ConstructL()
{
iMember = 0;
}

CMySimpleClass* CMySimpleClass::NewLC()
{
CMySimpleClass *self= new (ELeave) CMySimpleClass;
CleanupStack::PushL(self);
self->ConstructL();
return self;
}

CMySimpleClass* CMySimpleClass::NewL()
{
CMySimpleClass *self = new (ELeave) CMySimpleClass;
CleanupStack::PushL(self);
self->ConstructL();
CleanupStack::Pop(self);
return self;
}

TInt CMySimpleClass::Get()
{
return iMember;
}

void CMySimpleClass::AddInt(TInt aValue)
{
iMember = iMember + aValue;
}


###################################################


#ifndef CMySimpleClass_H
#define CMySimpleClass_H
#include <e32base.h>
class CMySimpleClassublic CBase
{
public:
CMySimpleClass();
~CMySimpleClass();
void AddInt(TInt aValue);
TInt Get();
static CMySimpleClass* NewL();
static CMySimpleClass* NewLC();
void ConstructL();
private:

TInt iMember;

};

#endif


###################################################


#include "CMyCompoundClass.h"

void CMyCompoundClass::ConstructL()
{
iSimpleClass = CMySimpleClass :: NewL();
iSimpleClass->AddInt(5);
}

CMyCompoundClass* CMyCompoundClass::NewLC()
{
CMyCompoundClass* self= new (ELeave) CMyCompoundClass;
CleanupStack::PushL(self);
self->ConstructL();
return self;
}

CMyCompoundClass* CMyCompoundClass::NewL()
{
CMyCompoundClass *self = new (ELeave) CMyCompoundClass;
CleanupStack::PushL(self);
self->ConstructL();
CleanupStack::Pop(self);
return self;
}

TInt CMyCompoundClass::Get()
{
return iSimpleClass->Get();
}

void CMyCompoundClass::AddInt()
{
iSimpleClass->AddInt(5);
}


###################################################


#include <e32base.h>
#include "CMySimpleClass.h"
class CMyCompoundClassublic CBase
{
public:
CMyCompoundClass();
~CMyCompoundClass();
void AddInt();
TInt Get();
static CMyCompoundClass* NewL();
static CMyCompoundClass* NewLC();
void ConstructL();
private:

CMySimpleClass *iSimpleClass;

};


/* Copyright (c) 2004, Nokia. All rights reserved */


###################################################


// INCLUDE FILES
#include <coemain.h>
#include "HelloWorldBasicAppView.h"


// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------
// CHelloWorldBasicAppView::NewL()
// Two-phased constructor.
// -----------------------------------------------------------------------------
//
CHelloWorldBasicAppView* CHelloWorldBasicAppView::NewL( const TRect& aRect )
{
CHelloWorldBasicAppView* self = CHelloWorldBasicAppView::NewLC( aRect );
CleanupStack::Pop( self );
return self;
}

// -----------------------------------------------------------------------------
// CHelloWorldBasicAppView::NewLC()
// Two-phased constructor.
// -----------------------------------------------------------------------------
//
CHelloWorldBasicAppView* CHelloWorldBasicAppView::NewLC( const TRect& aRect )
{
CHelloWorldBasicAppView* self = new ( ELeave ) CHelloWorldBasicAppView;
CleanupStack::PushL( self );
self->ConstructL( aRect );
return self;
}

// -----------------------------------------------------------------------------
// CHelloWorldBasicAppView::ConstructL()
// Symbian 2nd phase constructor can leave.
// -----------------------------------------------------------------------------
//
void CHelloWorldBasicAppView::ConstructL( const TRect& aRect )
{
// Create a window for this application view
CreateWindowL();

// Set the windows size
SetRect( aRect );
iCompoundClass = CMyCompoundClass :: NewL();

// Activate the window, which makes it ready to be drawn
ActivateL();
}

// -----------------------------------------------------------------------------
// CHelloWorldBasicAppView::CHelloWorldBasicAppView()
// C++ default constructor can NOT contain any code, that might leave.
// -----------------------------------------------------------------------------
//
CHelloWorldBasicAppView::CHelloWorldBasicAppView()
{
// No implementation required
}


// -----------------------------------------------------------------------------
// CHelloWorldBasicAppView::~CHelloWorldBasicAppView()
// Destructor.
// -----------------------------------------------------------------------------
//
CHelloWorldBasicAppView::~CHelloWorldBasicAppView()
{
// No implementation required
delete iCompoundClass;
}


// -----------------------------------------------------------------------------
// CHelloWorldBasicAppView:raw()
// Draws the display.
// -----------------------------------------------------------------------------
//
void CHelloWorldBasicAppView:raw( const TRect& /*aRect*/ ) const
{
// Get the standard graphics context
CWindowGc& gc = SystemGc();

// Gets the control's extent
TRect rect = Rect();


// to the Draw-method:

// get the number
TInt number=iCompoundClass->Get();

// create a descriptor and copy the number into it
TBuf<32> numAsText;
numAsText.Num(number); // convert the number to the text


// write the text to the display
gc.UseFont(iCoeEnv->NormalFont());

gc.DrawText(numAsText, TPoint(10,40));
gc.DiscardFont();

ResetGc();

// Clears the screen
gc.Clear( rect );
}

// End of File

/* Copyright (c) 2004, Nokia. All rights reserved */


###################################################


#ifndef __HELLOWORLDBASICAPPVIEW_H__
#define __HELLOWORLDBASICAPPVIEW_H__

// INCLUDES
#include <coecntrl.h>
#include "CMyCompoundClass.h"

// CLASS DECLARATION
class CEikLabel;
class CHelloWorldBasicAppView : public CCoeControl
{
public: // New methods

/**
* NewL.
* Two-phased constructor.
* Create a CHelloWorldBasicAppView object, which will draw itself to aRect.
* @param aRect The rectangle this view will be drawn to.
* @return a pointer to the created instance of CHelloWorldBasicAppView.
*/
static CHelloWorldBasicAppView* NewL( const TRect& aRect );

/**
* NewLC.
* Two-phased constructor.
* Create a CHelloWorldBasicAppView object, which will draw itself
* to aRect.
* @param aRect Rectangle this view will be drawn to.
* @return A pointer to the created instance of CHelloWorldBasicAppView.
*/
static CHelloWorldBasicAppView* NewLC( const TRect& aRect );

/**
* ~CHelloWorldBasicAppView
* Virtual Destructor.
*/
virtual ~CHelloWorldBasicAppView();
void ConstructL(const TRect& aRect);

public: // Functions from base classes

/**
* From CCoeControl, Draw
* Draw this CAnimationAppView to the screen.
* @param aRect the rectangle of this view that needs updating
*/
void Draw( const TRect& aRect ) const;

private: // Constructors

/**
* ConstructL
* 2nd phase constructor.
* Perform the second phase construction of a
* CHelloWorldBasicAppView object.
* @param aRect The rectangle this view will be drawn to.
*/


/**
* CHelloWorldBasicAppView.
* C++ default constructor.
*/
CHelloWorldBasicAppView();
// CEikLabel* iLabel; // example label
// CEikLabel* iMyLabel; // added 4.9
// CEikLabel* iToDoLabel; // example label
CMyCompoundClass* iCompoundClass;

};

#endif // __HELLOWORLDBASICAPPVIEW_H__

// End of File


There is all the code, can someone say what am I doing wrong?

[eswar_illuri]

Hi,

You have not implemented default constructor in your CMyCompoundClass.

regards,
eswar

[Gride]

Thank you Eswar, that was it...
Very shamed about the rookie/newbie mistake =)

[NigelT]

I am having a similar issue, i am trying to follow the view server example on the NewLC website and have made all the necessary changes but get the following link errors when I compile the code:


Undefined symbol: 'int CFont::AscentInPixels(void) const (?AscentInPixels@CFont@@QBEHXZ)' referenced from 'void CClientSideAppView:raw(class TRect const &) const (?Draw@CClientSideAppView@@UBEXABVTRect@@@Z)' in ClientSideAppView.cpp:111

Undefined symbol: 'int CFont::TextWidthInPixels(class TDesC16 const &) const (?TextWidthInPixels@CFont@@QBEHABVTDesC16@@@Z)' referenced from 'void CClientSideAppView:raw(class TRect const &) const (?Draw@CClientSideAppView@@UBEXABVTRect@@@Z)' in ClientSideAppView.cpp:103 referenced from 'void CClientSideAppView:raw(class TRect const &) const (?Draw@CClientSideAppView@@UBEXABVTRect@@@Z)' in ClientSideAppView.cpp:110

Undefined symbol: 'void RWindowTreeNode::SetOrdinalPosition(int) (?SetOrdinalPosition@RWindowTreeNode@@QAEXH@Z)' referenced from 'void CClientSideAppView::ViewActivatedL(class TVwsViewId const &, class TUid, class TDesC8 const &) (?ViewActivatedL@CClientSideAppView@@EAEXABVTVwsViewId@@VTUid@@ABVTDesC8@@@Z)' in ClientSideAppView.cpp:141

I'm having trouble understanding the problem, have I left out a needed header file or something?

Here is the relevant function for reference:

void CClientSideAppView:raw(const TRect& /*aRect*/) const
{
_LIT(KTitle,"ClientSide App");
_LIT(KCredit,"Nigel");

CWindowGc& gc = SystemGc(); // Window graphics context
TRect rect = Rect(); // Area in which we shall draw
TPoint point(0,0);
const CFont* font = iEikonEnv->NormalFont();
gc.SetBrushColor(KRgbBlack);
gc.Clear(); // Start with a clear screen
gc.SetPenColor(KRgbWhite);
gc.UseFont(font);

point.iX = rect.Width()/2 - font->TextWidthInPixels(KTitle)/2;
point.iY = rect.Height()/2;

gc.DrawText(KTitle, point);
gc.DiscardFont();
font = iEikonEnv->AnnotationFont();

point.iX = rect.Width()/2 - font->TextWidthInPixels(KCredit)/2;
point.iY = font->AscentInPixels() + 10;

gc.UseFont(font);
gc.DrawText(KCredit, point);
gc.DiscardFont();
}

[antonypr]

Have you included gdi.lib and ws32.lib in your .mmp file?
Or, if you are using Carbide.c++, have you added them in the Project Properties? It seems that they are missing from your project file.

Antony

[wizard_hu_]

You have not mentioned the SDK you use. Note that implementation of CFont has been moved to gdi.lib starting from S60 3rd edition.

Edit: sorry Antony, somehow I haven't noticed the gdi.lib in your post at the first read.

[NigelT]

I have included my SDK and IDE in my sig (should have done this before).
I have both gdi.lib and ws32.lib in my .mmp file, but have not added them to my project properties. Could you explain this please, how do I add these .lib files to my project properties?

[NigelT]

I have just found this out.

But why do I have to do this for Carbide? Why is not enough to include them in the .mmp file?

[wizard_hu_]

Carbide.c++ does not use the .mmp file. It can import it, but it is a one-time action.
As I remember, if you generate a new project with Carbide.c++ it will have no .mmp at all.

[antonypr]

wizard_hu is right, you have to do it from Project Properties because Carbide.c++ doesn't process .mmp file.

One more thing to remember, you have to add those libraries in all targets, e.g. WINSCW, GCCE. Adding in one target will not add them in other targets.

Antony