[ECOS] Ignore earlier dumb question, but here is another

Gary Thomas gthomas@redhat.com
Tue Jan 9 05:53:00 GMT 2001

On 09-Jan-2001 Lewin A.R.W. Edwards wrote:
> Hi Gary,
>> > told me the correct switch to use. I've recompiled eCos with -fpack-struct
>> > and all is seemingly well. However I worry that the OS might not have been
>> > tested in this configuration. Any known caveats?
>>I have tried it when building network code.  It doesn't break antyhing, AFAIK,
>>but it also may not always do just what you want.  YMMV
> Do you by chance have an alternate suggestion? Really the only part of my 
> code that needs this functionality is the filesystem (and my JPEG codec). 
> There must be a mechanism for accomplishing what I need.
> I did try a "composite build" wherein my code was compiled with packed 
> structures and eCos was compiled with aligned structures, and it DID work, 
> but that's probably because I'm not using any OS functionality at all.

Look at the networking code.  We use __attribute__(pack) on the structures
which matter and it works just fine.  It avoids the "big hammer" which often
does not function as intended.

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