[ipv6hackers] Definition of "struct ip6_opt" in Mac OS

[Fernando Gont]

On 07/19/2012 09:24 PM, Adrian Bool wrote:
> There is a /usr/include/Availability.h file which includes,
> 
>     #define __MAC_10_0      1000
>     #define __MAC_10_1      1010
>     #define __MAC_10_2      1020
>     #define __MAC_10_3      1030
>     #define __MAC_10_4      1040
>     #define __MAC_10_5      1050
>     #define __MAC_10_6      1060
>     #define __MAC_10_7      1070
>     #define __MAC_NA        9999   /* not available */
> 
> 
> If you've got 10.6 headers installed; then I'd imagine the __MAC_10_7
> contact would be undefined…  Perhaps a good enough handle to make a choice?

I assume I'd have to include this file myself before checking the
relevant constants, right?

That aside, some Google'ing revealed that (apparently) there's the
"__APPLE_CC__" constant, which specifies the xcode version:

Xcode 3.0              5465
Xcode 3.1              5470
Xcode 3.1 (GCC 4.2)    5553
Xcode 3.2.3            5664  (Got this value from my own compiler)

(source:
<http://stackoverflow.com/questions/3592805/detecting-compiler-versions-during-compile-time>)

Can anyone double-check this?

Thanks!

Best regards,
-- 
Fernando Gont
SI6 Networks
e-mail: fgont at si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492