Hi,

I have a link error concerning ??_GMYCLASS@MYNAMESPACE@@QAEPAXI@Z (void *syscall MYNAMESPACE::MYCLASS::scal_del_dtor(unsigned)) for one of my classes when linking. The same code compiles and links fine with both MSVC6 and Mingw gcc.

Anything I should look for or change so that my code links with DM?

Regards,
Gilles

Try shrinking your code to the smallest possible example and post it / email it so I can have a look. -Walter

"Gilles Depeyrot" <gilles_depeyrot@mac.com> wrote in message news:brhrd9$24vj$1@digitaldaemon.com...
> Hi,
>
> I have a link error concerning ??_GMYCLASS@MYNAMESPACE@@QAEPAXI@Z (void *syscall MYNAMESPACE::MYCLASS::scal_del_dtor(unsigned)) for one of my classes when linking. The same code compiles and links fine with both MSVC6 and Mingw gcc.
>
> Anything I should look for or change so that my code links with DM?
>
> Regards,
> Gilles

Hi,

I will try to do that but the code is rather complex including DLLs with classes that are imported or exported according to whether the DLLs define them or use them (using __declspec(dllimport) and __declspec(dllexport)) and templates.

I have determined that it is related to the use of both dllimport/dllexport and templates but I am having trouble producing a small test case.

I already have a difference in the code for Visual C++ versus GNU C++ because the template classes need to be explicitly exported for Visual C++. I do this using macros that export the instantiated templates for Visual C++:

#ifdef __GNUC__
#  define DefineScalarArray(name, element, range, export) \
      typedef MY_ScalarArray<element, range> name
#else
#  define DefineScalarArray(name, element, range, export) \
      typedef MY_ScalarArray<element, range> name; \
      template class export MY_BaseArray<element, range>; \
      template class export MY_ScalarArray<element, range>
#endif

Any chance there would be some similar problem with DigitalMars C++?

Regards,
Gilles

Walter wrote:

> Try shrinking your code to the smallest possible example and post it / email
> it so I can have a look. -Walter
> 
> "Gilles Depeyrot" <gilles_depeyrot@mac.com> wrote in message
> news:brhrd9$24vj$1@digitaldaemon.com...
> 
>>Hi,
>>
>>I have a link error concerning ??_GMYCLASS@MYNAMESPACE@@QAEPAXI@Z (void
>>*syscall MYNAMESPACE::MYCLASS::scal_del_dtor(unsigned)) for one of my
>>classes when linking. The same code compiles and links fine with both
>>MSVC6 and Mingw gcc.
>>
>>Anything I should look for or change so that my code links with DM?

"Gilles Depeyrot" <gilles_depeyrot@mac.com> wrote in message news:brlbeg$19qs$1@digitaldaemon.com...
> Hi,
>
> I will try to do that but the code is rather complex including DLLs with
> classes that are imported or exported according to whether the DLLs
> define them or use them (using __declspec(dllimport) and
> __declspec(dllexport)) and templates.

My experience with such things, though, is no matter how complex they look, they nearly always boil down to 20 lines of code or less that shows the problem.

> Any chance there would be some similar problem with DigitalMars C++?

I don't know.