Is there a querying macro for `__alignof`?

Hi,

I'm trying to write a patch for Boost.TypeTraits to use clang's
type traits intrinsics. Is there a querying macro for checking availability of
`__alignof`? If not, is there any plan to add it?

Thanks in advance.

Regards,
Michel

__GNUC__ >= 3? I don't really see much point to a separate querying macro...

-Eli

Forgot to send to cfe-dev list; so I forward the message, for the record.