Hello,
I'm quite new here, but there's a problem that needs solution. I think the title says exactly what I want to do. I need to use C for a reason I don't think is this important to mention. I tried searching Google, and found the same solution on most of the results.
After some searching I made a test application using solutions I found... but I can't get it working, I get a linker error.
If it's important: I'm using GCC 4.2.4 on a Linux.

Now some code...

main.c

#include <stdio.h>
#include "wrp.h"

int main(){
    printf("wrapper\n");
    wrp();
}

wrp.h

#ifdef __cplusplus
extern "C"
#endif
void wrp();

cppcode.cpp

#include <iostream>
#include "wrp.h"

extern "C" void wrp(){
     std::cout << "wrapper zakonczyl dzialanie!\n";
}

Linker error I get:

/tmp/cc6Irctr.o: In function `main':
main.c:(.text+0x1e): undefined reference to `wrp'
collect2: ld returned 1 exit status

Command I use: gcc main.c -o test

Thanks in advance for Your help.
-Marek

PS. I don't know if this thread belongs to C or C++ forum.

It worked! I can't believe it was so simple :)

Output:

wrapper
wrapper zakonczyl dzialanie!

Thanks a lot!

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