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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