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Altera_Forum's avatar
Altera_Forum
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21 years ago

C++ example

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.

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    21 years ago

    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's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    21 years ago

    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.