dev-cpp-users

[Dev-C++] Strange linking problem (?)

[Hielke <hie...@he...>]

Hi all,

During the compilation of the following constructor I get a =
"'GetInstance' undeclared" error. However I included an headerfile which =
includes the appropriate header (windows.h) to use that function.

// topwindow1.cc
#include "windowwrappers.ih"

TopWindow::TopWindow(WindowClass &winClass, int resId)
:
  Window(winClass)
{
  d_style =3D WS_OVERLAPPEDWINDOW;
  HINSTANCE hInst =3D GetInstance();
  d_windowName =3D ResourceString(hInst, resId);
}

// windowwrappers.ih
#include "window.h"
#include "topwindow.h"

#include "../winexception.h"
#include "../resourcestring.h"

#include <windows.h>


I don't get why it won't compile. Especially because I use the very same =
function in a classmember of another class:

// setdefaults.cc
#include "classwrappers.ih"

void WindowClass::SetDefaults()
{
  /* <some code> */

  d_class.lpszClassName =3D GetName();=20
  d_class.hInstance =3D GetInstance();=20

  /* <some more code> */
}

// classwrappers.ih
#include "simplewindowclass.h"
#include "windowclass.h"
#include "topwindowclass.h"

#include "../resourcestring.h"
#include "../winexception.h"

#include <windows.h>
#include <string>

Note that I use a nonstandard extension for the headerfiles (following =
the "internal header" approach where classmembers include a common =
headerfile (which in turn includes the header containing =
classdeclaration)). This might be the cause of linker problems when =
using Dev-C++ but I already tried projectfile options. Currently the =
*.ih files are neither included during compilation nor during =
linkingprocess.

Thanks in advance. Hope somebody sees what I'm doing wrong.=20

Regards,
    Hielke
    zw...@he...

Re: [Dev-C++] Strange linking problem (?)

[Billiam <bon...@ya...>]

Do you have all the libraries linked to it that you should have? That might be the problem, but Im not sure.

Hielke <hie...@he...> wrote:Hi all,
 
During the compilation of the following constructor I get a "'GetInstance' undeclared" error. However I included an headerfile which includes the appropriate header (windows.h) to use that function.
 
// topwindow1.cc
#include "windowwrappers.ih"
 
TopWindow::TopWindow(WindowClass &winClass, int resId)
:
  Window(winClass)
{
  d_style = WS_OVERLAPPEDWINDOW;
  HINSTANCE hInst = GetInstance();
  d_windowName = ResourceString(hInst, resId);
}
 
// windowwrappers.ih
#include "window.h"
#include "topwindow.h"
 
#include "../winexception.h"
#include "../resourcestring.h"
 
#include <windows.h>
 
 
I don't get why it won't compile. Especially because I use the very same function in a classmember of another class:
 
// setdefaults.cc
#include "classwrappers.ih"
 
void WindowClass::SetDefaults()
{
  /* <some code> */
 
  d_class.lpszClassName = GetName(); 
  d_class.hInstance = GetInstance(); 

  /* <some more code> */
}
 
// classwrappers.ih
#include "simplewindowclass.h"
#include "windowclass.h"
#include "topwindowclass.h"
 
#include "../resourcestring.h"
#include "../winexception.h"
 
#include <windows.h>
#include <string>

Note that I use a nonstandard extension for the headerfiles (following the "internal header" approach where classmembers include a common headerfile (which in turn includes the header containing classdeclaration)). This might be the cause of linker problems when using Dev-C++ but I already tried projectfile options. Currently the *.ih files are neither included during compilation nor during linkingprocess.
 
Thanks in advance. Hope somebody sees what I'm doing wrong. 
 
Regards,
    Hielke
    zw...@he...


		
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Re: [Dev-C++] Strange linking problem (?)

[Hielke <hie...@he...>]

Billiam wrote:

> Do you have all the libraries linked to it that you should have? That 
> might be the problem, but Im not sure.

That's probably not it cause as mentioned I did use the GetInstance() 
API call on another place with the very same includes. The 
(internal)header files included by the source only include 
self-implemented classheaderfiles besides the <windows.h> header. Those 
classes do not include any other header not also mentioned in those 
internal headers. That's why I think it is a linkerproblem. However I 
don't get it solved no matter what change in the projects filesettings.

Regards,
  Hielke
  zw...@he...

Re: [Dev-C++] Strange linking problem (?)

[Scott S. <age...@co...>]

Try changing the order you include headers. Normally you have to include 
the Windows header first. Also, you can try another compiler, like the 
MSVC++ compiler. Look around on MSDN for it, you can download just the 
compiler for free. Or you can try Borland's command line compiler.
Hielke wrote:

> Billiam wrote:
>
>> Do you have all the libraries linked to it that you should have? That 
>> might be the problem, but Im not sure.
>
>
> That's probably not it cause as mentioned I did use the GetInstance() 
> API call on another place with the very same includes. The 
> (internal)header files included by the source only include 
> self-implemented classheaderfiles besides the <windows.h> header. 
> Those classes do not include any other header not also mentioned in 
> those internal headers. That's why I think it is a linkerproblem. 
> However I don't get it solved no matter what change in the projects 
> filesettings.
>
> Regards,
>  Hielke
>  zw...@he...
>
>
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