[lwip-users] [lwip] Problems with struct member aligment within lwIP

[Konrad, Guido]

Hi,

porting lwIP to ARM7TDMI with ADS 1.1 if encounter problems with the member
alignement within structures. I've found the comment in arp.c to compile the
structure arp_hdr with __packed directive. Nevertheless it seems that some
more structures need this. Background is that the ARM compiler always
constructs structures with an aligment of 4! Only for structures preceeding
this __packed directive the alignment is 1. But this structures can not be
carsted to non packed structures, nor casted implizitly to e.g. void*.

Has anybody an answer?

Regards,

 Guido Konrad


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