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Steve Marsden - 01 Dec 2004 17:35 GMT

Hi

I have a project which uses some C code and some C++ code. I have a
structure I want to use in both the C code and the C++ code. I have this
structure defined in an include file which I have included in the C file and
the C++ file.

The project is compiled with /clr and compiles OK but when it links I get:

Error LNK2022 metadata operation failed (8013118D) : Inconsistent layout
information in duplicated types (job_mdb_item): (0x0200000b)

The types are not duplicated. The structure job_mdb_item is only declared
once in the include file but I assume it is getting compiled differently in
the C++ file than it is in the C file so the end result is the error caused
here.

How can I ensure that it is complied the same in the C++ file as it is in
the C file to avoid this error. I am experienced in C but new to C++ and
managed C++

Thanks

Steve

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Carl Daniel [VC++ MVP] - 01 Dec 2004 17:47 GMT

> Hi
>
[quoted text clipped - 16 lines]
> the C file to avoid this error. I am experienced in C but new to C++ and
> managed C++

In your C++ file (but not your C file), instead of

#include "job_mdb.h"

use

extern "C" {
#include "job_mdb.h"
}

Alternatively, inside your header file you can use

#ifdef __cplusplus
extern "C" {
#endif

struct job_mdb
{
//...
};

#ifdef __cplusplus
}
#endif

HTH

-cd

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Steve Marsden - 02 Dec 2004 10:22 GMT

Hi Carl

Thanks for the reply.

Sadly this doesnt work. I still get the same linker error.

Steve

>> Hi
>>
[quoted text clipped - 46 lines]
>
> -cd

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