Wireshark · Wireshark-dev: Re: [Wireshark-dev] Structure sizes change between Linux and Windowshelp

[Jaap Keuter <jaap.keuter@xxxxxxxxx>]

Please note that this still doesn't get your dissector into the 
repository,
if that was ever the intention.

Thanks,
Jaap

On Fri, 29 Jul 2011 11:27:05 +0200, news.gmane.com wrote:

> Even if you shouldn't use structs as you can read in README.developer
> MSVC
> provides the tools:
>
> #ifndef GNUC
> #pragma pack(push)
> #pragma pack(1)
> #endif
>
> struct foo {
> char x;
> int y;
> }
> #ifdef GNUC
> __attribute__((packed))
> #endif
> ;
>
> struct bar {
> char a;
> long b;
> }
> #ifdef GNUC
> __attribute__((packed))
> #endif
> ;
>
> #ifndef GNUC
> #pragma pack(pop)
> #endif
>
> It looks as it is: ugly.
> Please note that the #ifdef GNU probably needs to be changed, I don't
> know
> the correct symbol to check for.
>
> "Alex Lindberg" wrote in
> message
> news:1311888444.59800.YahooMailClassic@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
> [2]...
> I am creating a dissector that overlays a complicated struct (bit
> fields,
> unions, etc) on the the tvb. My Linux version works as designed, 
> however
>
> when I move it to Windows (win32) the size of the struct changes and
> thus,
> won't overlay the tvb properly.
>
> I am not an expert with Windows, but is there a compiler flag that 
> will
> cause CC and/or LINK to work the same as GCC?
>
> Thanks for your help.
>
> Alex Lindberg