Wireshark · Wireshark-dev: Re: [Wireshark-dev] Naive attempt to dissect.

[Jeff Morriss <jeff.morriss.ws@xxxxxxxxx>]

Bruno Hivert wrote:
> Hello,
>
> I’m trying some very simple decoding for gsm-map packets. It’s very 
> simple, because the dissector I need already exists, it’s just not 
> called in the proper context.
>
> If you have a look at the attached diff file, you’ll understand what I’m 
> trying to do.
>
> However, I cannot even try this apparently trivial-as-an-API-call 
> modification, because it does not compile.
[...]
> epan/.libs/libwireshark.so: undefined reference to `de_bearer_cap'

[...]

> What am I doing wrong, and where can I express the dependency without 
> pulling way to many things in ?

The basic problem is that de_bearer_cap() is declared as static in 
packet-gsm_a_dtap.c: that means no other module (.c file) can use it. 
If you remove the keyword "static" it will at least link.  (Of course it 
would also be better to have a prototype in a header file, etc.)