Re: [Predef-contribute] Predefined macro updates and fixes

[Hans-Christoph S. <ha...@at...>]

Hey Guillem,

Thanks for these info. Do you have any references on any of these?  I'm trying
to add links to the canonical source as I update the wiki.

.hc

On 11/23/2012 01:25 PM, Guillem Jover wrote:
> Hi!
> 
> Here's some corrections and updates:
> 
> 
> For GNU/kFreeBSD both __FreeBSD_kernel__ && __GLIBC__ should be
> checked, because FreeBSD has started defining __FreeBSD_kernel__
> (since FreeBSD 8.3, FreeBSD 9.1 and FreeBSD 10.0 on those branches).
> 
> For GNU/Hurd, __gnu_hurd__ is also defined, and because it's currently
> based on the GNU Mach kernel, so is __MACH__.
> 
> The same goes for GNU/Linux, the common check there is __linux__ &&
> __GLIBC__ instead of __gnu_linux__ (although valid).
> 
> To distinguish GNU/* systems in general, just testing for __GLIBC__
> should be enough.
> 
> 
> The new ARM64 architecture (officially called with the unfortunate
> name of AArch64...), defines the __aarch64__, __AARCH64EB__ and
> __AARCH64EL__ macros (the last two for big and little endian variants).
> 
> The new x32 architecture (or different ABI for AMD64, depending how
> one looks at it), can be distinguished with __amd64__ && __ILP32__.
> 
> 
> Regards,
> Guillem
> 
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