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Re: [ARM] EABI and the default to short enums

Sorry for being late to the party.

On Wed, Feb 15, 2012 at 9:55 AM, Ian Lance Taylor <> wrote:
> Ouch, I did not know that the EABI left this open. ?That seems like a
> bug, because it prevents code from being interoperable. ?This is
> precisely the kind of thing an ABI should address. ?Does anybody know
> why they did this?

It's a matter of platform variants.  There are a sufficient number of
ARM use cases where the extra bytes matter (or else, there are a
sufficient number of ARM vendors / customers who feel that it
matters).  But there's also cases like Linux where the advantages of
int-sized enums outweigh the space cost.  So the platform ABI
supplement is supposed to decide.

I believe that the Linux variant has other deviations from base than
just this.  The one I remember in particular is TLS models but there
may be others.  Please check the full range of differences before you
decide which would be a better base for RTEMS.


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