[En-Nut-Discussion] IP Checksum calculation broken. Reenabled old algorithm for the meantime.

[Ole Reinhardt]

Hi Harald,

> > architecture could overwrite it with it's own code supplied in the emac
> > driver file? Or is this a gcc specific extension?
> 
> As far as I know, weak declarations are not language, but linker
> specific. Furthermore, the __attribute__ keyword is GCC specific.

> Anyway, I do not have any problems with toolchain specific declarations
> in general. As long as you can make sure, that the code will still
> compile and link with other C89 tools. In its most simple form:

Good point, but this might raise a linker problem with non-GNU linkers,
if we add an architecture specific NutIpChkSumPartial() which would then
be defined twice. 

A simple way to avoid this would be to define an architecture specific
implementation for GNUC only as well.

Bye,

Ole

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