problem with static library linking

[send2harish]

Hi All,

I have a problem with the linking as explained below.


I created a new library mylib.a which uses a function func() present in the already existing library libpcap.a.

When I build mylib.a I did not see any error.

But when I build mylib.a with an executable I got a linking error of undefined reference to the function func(). Thi error was shown in a file which is present in mylib.a

On my link line I have tried the following order of linking.

1. libpcap.a mylib.a
2. mylib.a libpcap.a

But I am still having this error.

Could you please help me out.

Regards
-Harish

[send2harish]

I have resolved the error.

The reason is the way I was including the header file.

The function func() present in the file ipv6hdrs.h( definition in ipv6hdrs.c) and in the library libpcap.a

In the library mylib.a and in the file test.cc I included ipv6hdrs.h as below

#include "ipv6hdrs.h"


Later I noticed that the definition of func() is present in the .c file rather than .cc file.

So I changed the header file inclusion to

extern C
{
#include "ipv6hdrs.h"
}

and it worked. I could build my executable properly.