Re: [lwip-users] LwIP and IAR Workbench

[Jonathan Larmour]

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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