Hi L.Suresh,
It appears that the libipq.a is a C ABI library, but the header file(s) for libipq.a are not specified as using the C ABI when compiled with C++.
For example, if you look at one of the those header files (I'm guessing "ipq.h") does it have this near the top (AFTER any included header files in the ipq.h):
#ifdef __cplusplus
extern "C" {
#endif...and this near the bottom...
#ifdef __cplusplus } #endif
If it doesn't have those C++ guards, then to include the C++-ignorant C header file, you should do this in your iptables.cpp file (I'm just making them up off the top of my head):
#include "iptable.h"
extern "C" {
#include "ipq.h"
}
#include <iostream>
#include <cstddef>
#include <cassert>Or what I've seen developers do is make a ipq.hpp file that only contains this:
extern "C" {
#include "ipq.h"
}Then your C++ code doesn't look so polluted, and just contains this: #include "iptable.h" #include "ipq.hpp" #include <iostream> #include <cstddef> #include <cassert>
HTH, --Eljay
