RE: [lwip-users] LwIP and IAR Workbench

[Zeder, Stacy]

Jifl...

I looked for the files arch/bpstruct.h and arch/epstruct.h but don't
find them in the 1.3.0 distribution.  Obviously I'm missing something.
Here's the download:
http://download.savannah.gnu.org/releases/lwip/lwip-1.3.0.zip I used.
Is there another place I should be looking?

...Stacy


-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf
Of Jonathan Larmour
Sent: Tuesday, August 19, 2008 1:47 PM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] LwIP and IAR Workbench

FreeRTOS.org Info wrote:
> Everywhere there is a macro that aligns a struct you have to add in:
> 
> #pragma data_alignment=4
> 
> Everywhere there is a macro that packs a struct you have to add in:
> 
> #pragma pack(1)
> 
> Because they use a # you cannot simply define the macro
PACK_STRUCT_STRUCT
> to do this for you.

This is why lwIP also provides PACK_STRUCT_USE_INCLUDES and provide two 
files: arch/bpstruct.h and arch/epstruct.h (begin packed struct and end 
packed struct).

You can then put the #pragma pack(1) in bpstruct.h and #pragma 
data_alignment=4 in epstruct.h.

Jifl
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