[patch] Find if we are big endian at compile time

[Chandler Carruth]

On Thu, Apr 11, 2013 at 4:53 PM, Rafael Espíndola <
rafael.espindola at gmail.com> wrote:

> On 11 April 2013 19:45, Rafael Espíndola <rafael.espindola at gmail.com>
> wrote:
> >> It's worth noting that __BYTE_ORDER__ and friends are only available
> >> starting with GCC 4.6.
> >
> > gah, that kill the patch :-(
> >
> > On OS X gcc defines __LITTLE_ENDIAN__. Do you know if that is also
> > true of other platforms?
>
> I just checked on linux and it doesn't :-(
>
> We could ifdef on the processor defines, but that would probably get
> nasty. I will see what I can do without the ICE.
>

Err, on essentially any modern system, I think you can use <endian.h> (see
the endian(3) man page) to get BYTE_ORDER to be defined.

I would suggest using the preprocessor pattern outlined at the bottom of
this page: http://sourceforge.net/p/predef/wiki/Endianness/


>
> Thanks,
> Rafael
>
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