C++ example

Altera_Forum · ‎03-31-2005

Hi everyone,

I was wondering if there comes an C++ example for the lightweight ip stack with NIOSII ? I only see c examples, but if i want to extend them with C++ it won't work because of the differences in C and C++. Ofcourse i can change the code to work with C++ but if there is a specific example i like too know,

Thanks in advance,

jmastron.

Altera_Forum · ‎03-31-2005

There should be no problem with calling the LWIP C functions from C++. The only thing you have to ensure is that function prototypes are declared to be external C functions.

The easiest way to do this is to wrap the include for the LWIP files in an extern "C" decleration, e.g.:

extern "C" {# include "lwip/sys.h"# include "lwip/netif.h"# include "lwip/sockets.h"

};

Other than that, everything should work fine.

Altera_Forum · ‎03-31-2005

Ok, I know that I should use extern "C".

I only wants to have an working C++ example for the lwip module, because the given examples are in C, and it is not so easy to convert them to C++ (I tried, but didn't get it working). Adding "extern "C"" isn't enough.

Thanks anyway,

Michel.