Using c DLL into c++ project

Question

So I have a problem. I have read many things but nothing seems to be working for me.

I have this C library, and I made project with file:

//send.h
#ifndef SEND_H
#define SEND_H

#ifdef __cplusplus
extern "C" {
#endif
        static int Send_Sample(void);


#ifdef __cplusplus
}
#endif

#endif /* SEND_H */

And I have

//send.c
#include "thatLibrary.h"
static int Send_Sample(void)
{ return 0; }

So I created project as Empty DLL and than after that i built it, and its ok. But when i made another project, and referenced this one in it, I do

#include "send.h"

And this include is working, he sees that .h file, but when i build the other project, it says:

Error   C2129   static function 'int Send_Sample(void)' declared but not defined    AzureEventHubClient c:\users\v-vlvesi\documents\github\azureeventhubclibrary\azureeventhubclient\source.cpp 9

Does anyone know how to fix this ?

Thanks !

Try removing the `static` modifier from your function. – StaticBeagle Nov 04 '16 at 14:59 — StaticBeagle, Nov 04 '16 at 14:59

score 1 · Answer 1 · edited May 23 '17 at 12:19

1

The 'static' keyword actually prevents the function from being exported from the DLL. You also have to make use of dllimport and dllexport.

You can refer to this previous answer for how to instrument your code: Exporting functions from a DLL with dllexport

edited May 23 '17 at 12:19

Community

1
1

answered Nov 04 '16 at 15:18

Stéphane Perras

71
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Using c DLL into c++ project

1 Answers1