undefined reference to virtual table / type_info function

Quote:
but now i've added the cpp files to my project

There's your problem. Friends don't let friends use C++.

(Sorry for not having anything actually useful to add..)

In Antwort auf:
You've not implemented the method and it's complaining.

No, that would be too simple

The type_info function is an internal gcc function and i get a undefined reference to virtual table linker error if i declare a c'tor or d'tor.

Quote:
The type_info function is an internal gcc function and i get a undefined reference to virtual table linker error if i declare a c'tor or d'tor.

Quote:
There's your problem. Friends don't let friends use C++.

In which case I advise you to get that, almost entirely C++, player binary the heck off your empeg

Peter

Quote:
In which case I advise you to get that, almost entirely C++, player binary the heck off your empeg

Peter

In Antwort auf:
Are you using ld, gcc or g++ as the linker command? You get extra magic if you link using g++.

In Antwort auf:
Otherwise I'd suggest that you've failed to implement a method somewhere -- GCC "keys" generation of the vtable to one of the methods (to avoid having to compile it multiple times) and, if it happens to have picked one you haven't implemented, linking will fail.

In Antwort auf:
Try compiling the C sources with g++, too. It may be a mangling issue.

In Antwort auf:
My guess is that you're trying to call C++ functions from C and the C object file is expecting to see myfunc() and the C++ object file is providing gnu_int_int_myfunc() or some such nonsense.

#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/ioctl.h>

int main ()
{
if (0 != fork ())
{
return 0;
}
return 0;
}

Quote:
Try to compile the following code with g++:
Code:

---

#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/ioctl.h>

int main ()
{
if (0 != fork ())
{
return 0;
}
return 0;
}

---

In Antwort auf:
But try including unistd.h.

In Antwort auf:
It doesn't compile, because fork() is in <unistd.h>. Once that's corrected, it certainly links. C++ is less forgiving than C of missing declarations, and thus of missing header files.