Re: Problem building new style plugin

[Paul Offord <Paul.Offord () advance7 com>]

Hi Anders,

Yes – I’ve deleted the entire wsbuild64 directory and rebuilt, but the problem is that I’m not completely clear on 
what’s required in my code.  I think I need to understand _imp_ and imports in general.  The thing I can’t work out is 
that I’ve written other plugins that call DLL functions and I’ve never really had to think about it – it just seemed to 
work.

Best regards…Paul

From: Wireshark-dev [mailto:wireshark-dev-bounces () wireshark org] On Behalf Of Anders Broman
Sent: 06 February 2018 05:33
To: Developer support list for Wireshark <wireshark-dev () wireshark org>
Subject: Re: [Wireshark-dev] Problem building new style plugin

Hi,
Did you try to delete the build dir and start over with cmake/msbuild ?
Regards
Anders

Den 6 feb. 2018 2:17 fm skrev "João Valverde" <joao.valverde () tecnico ulisboa pt<mailto:joao.valverde () tecnico 
ulisboa pt>>:
Hi Paul,

DLL_PUBLIC is not "new style" (it's just a macro definition), although the inference is understandable.

The hello plugin example is specific to Linux and GCC, the idea being that you can just apt install wireshark (or 
equivalent) and build only your plugin against that.

As far as visibility goes you can just include ws_symbol_export.h and use WS_DLL_PUBLIC as usual.

Hope that helps.

On 06-02-2018 00:12, Paul Offord wrote:
Sorry to bother you all with this but I can’t seem to figure this out.

I was running with a git master branch that I think was 2.5.  I had a plugin that I could build and it worked OK.  At 
the weekend I did a git pull for master and now I can’t get my plugin to build.  I reread the plugin.README and 
dissector.README files and I think I’ve done everything necessary to code the plugin in the new style.

I’ve tried copying some of the code from the hello.c example, specifically I’ve added this to the top of my plugin:

#ifndefVERSION

#defineVERSION "0.0.0"

#endif

#defineDLL_PUBLIC__attribute__((__visibility__("default")))

DLL_PUBLICconstgchar plugin_version[] = VERSION;

DLL_PUBLICconstgchar plugin_release[] = VERSION_RELEASE;

DLL_PUBLICvoidplugin_register(void);

The VERSION line errors on:

  * DLL_PUBLIC – expected a type specifier
  * const – expected a ‘{‘

I’ve got more issues, but I suspect they relate to DLL linkage (lots of _/imp/_XXXX link errors).

The DLL_PUBLIC error seems pretty fundamental.  What am I doing wrong?

I’m using VS2015 on Windows 10.

Thanks and regards…Paul


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