Re: ATL and MFC causing link error - LNK2019: unresolved external

=?Utf-8?B?TGlzYSBM?= <llombardo@nospam.nospam>
Mon, 1 Oct 2007 15:42:01 -0700
If I do as you ask then the project hosting these classes no longer compiles.

My other non-ATL-based projects do not need that re-arrangement.
Why does this ATL-based project need the code different?
Are there settings I can change in the project?

here is my stdafx.h....

//#if !defined(AFX_STDAFX_H__698a6960-1ea3-11dc-81ae-00197d6b5501__INCLUDED_)
//#define AFX_STDAFX_H__698a6960-1ea3-11dc-81ae-00197d6b5501__INCLUDED_

#pragma warning (disable : 4503)
#pragma warning (disable : 4786)

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#define STRICT
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0500
#define VC_EXTRALEAN // Exclude rarely-used stuff from Windows headers

#include <afxwin.h>
#include <afxdisp.h>
//#include <afxtempl.h>
//#include <afxmt.h>
#include <afxext.h>

#include <atlbase.h>
#include <winsvc.h>
//maximum number of character size allowed for service

//You may derive a class from CComModule and use it if you want to override
//something, but do not change the name of _Module

class CServiceModule : public CComModule
    HRESULT RegisterServer(BOOL bRegTypeLib, BOOL bService);
    HRESULT UnregisterServer();
    void Init(_ATL_OBJMAP_ENTRY* p, HINSTANCE h, UINT nServiceNameID, const
GUID* plibid = NULL);
    void Start();
    void ServiceMain(DWORD dwArgc, LPTSTR* lpszArgv);
    void Handler(DWORD dwOpcode);
    void Run();
    BOOL IsInstalled();
    BOOL Install();
    BOOL Uninstall();
    LONG Unlock();
    void LogEvent(DWORD EventType, DWORD EventId);
    void SetServiceStatus(DWORD dwState);
    void SetupAsLocalServer();

    static void WINAPI _ServiceMain(DWORD dwArgc, LPTSTR* lpszArgv);
    static void WINAPI _Handler(DWORD dwOpcode);

// data members
    SERVICE_STATUS_HANDLE m_hServiceStatus;
    SERVICE_STATUS m_status;
    DWORD dwThreadID;
    BOOL m_bService;

extern CServiceModule _Module;
#include <atlcom.h>

// Microsoft Visual C++ will insert additional declarations immediately
before the previous line.

//#endif //

Here is my compiler command line....
/Od /I "..\..\Utilities" /I "..\..\STLport\stlport" /I
"..\..\products\Common" /I "..\..\products\MySTL" /I
"..\..\products\ThreadApi" /D "NDEBUG" /D "_WINDOWS" /D "_ATL_DLL" /D
"_AFXDLL" /D "_MBCS" /FD /EHsc /MD /Yu"stdafx.h" /Fp"Release\MyManager.pch"
/Fo"Release\\" /Fd"Release\MyManager.pdb" /W3 /nologo /c /Wp64 /Zi /Gd /TP

Here is my linker command line...

/VERBOSE /OUT:"..\..\Products\Release\MyManager.exe" /INCREMENTAL:NO /NOLOGO
/LIBPATH:"..\..\stlport\lib" /LIBPATH:"..\..\products\release" /MANIFEST
/NODEFAULTLIB /IGNOREIDL /DEBUG /PDB:"..\..\products\release\MyManager.pdb"
mfcs80.lib MSVCrt.lib Kernel32.lib user32.lib msimg32.lib comdlg32.lib
winspool.lib advapi32.lib shell32.lib comctl32.lib shlwapi.lib uuid.lib
oledlg.lib ole32.lib oleaut32.lib urlmon.lib atl.lib atls.lib Utilities.lib
MySTL.lib Common.lib ThreadAPI.lib wbemuuid.lib wmiutils.lib

"Giovanni Dicanio" wrote:

"Lisa L" <llombardo@nospam.nospam> ha scritto nel messaggio

I still get the same LINK error

1>MyManager.obj : error LNK2019: unresolved external symbol "protected:
__thiscall CSingletonObj::CSingletonObj(void)" (??0CSingletonObj@@IAE@XZ)
referenced in function "private: __thiscall CMyManager::CMyManager(void)"

Here is some code...

In the H file.

class CSingletonObj
/// Destructor
virtual ~CSingletonObj() {};
/// Constructor

Could you try the following, please?

Adjust the above code putting the CSingletonObj ctor implementation inside
class definition, i.e.:

 class CSingletonObj
    virtual ~CSingletonObj() {};

        // Autoregister with the CSingletonMgr

Then in the CPP file remove the CSingletonObj ctor definition.

(Make sure that CSingletonMgr is defined before CSingletonObj.)


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