Calling C++ function from C code
 

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.

Re: Calling C++ function from C code
 

g++ -c cppcode.cpp

gcc -c main.c

g++ -o test main.o cppcode.o

Oh, and that might not work either.

This is how to mix C and C++
http://www.parashift.com/c++-faq-lit...c-and-cpp.html
In particular, the main() needs to be C++ so that global ctors/dtors get called.

Re: Calling C++ function from C code
 

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

Output:

wrapper

wrapper zakonczyl dzialanie!

Thanks a lot!