Re: [lwip-users] Problem With dns.c Using 32-Bit Compilers

[Alain M.]

Jonathan Larmour escreveu:
> address@hidden wrote:
> > Jonathan Larmour wrote:
> > > One workaround may be to dispense with the uses of sizeof for those DNS
> > > records in that file, and replace them with e.g.
> > > #define SIZEOF_DNS_ANSWER 10
> > > and use that instead. The format and size is fixed after all.
> > >
> > >   
> > Wouldn't that be working around a bug in a compiler (that doesn't
> > support structure packing) which we agreed not to do?
>
> > From what he said, it does support structure packing, but still includes
> padding for alignment at the end.

I believe that is not a bug, on the contrary it looks like a bug-fixing. 
Let me explain: I use OpenWatcom and the new versions have the padding, 
the very old don't. I believe it is because of the array problem that 
has alredy been explained...

> I agree that no structure packing at all would not be worth attempting to
> support.

I agree too. Not to use packing would make the code bigger and all 
compilers have packing, it just a problem of syntax.

IMHP the appropriate pack/unpack files of each compiler should be 
included somewhere, so that any new user can use it :)

Alain