query on documentation

[Andi Kleen]

raybry@us.ibm.com writes:

> You,re right -- I missed those in "info gcc".  But it doesn't appear to be
> a full list.
> For example, __builtin_constant_p and __builtin_return_address aren't
> there.
> (The list in info gcc appears to be related to var args processing.)

__builtin_return_address is documented in ``C extensions''/
``Return Address''

__builtin_constant_p in ``C extensions'' / ``Other builtins''

Both in the gcc manual.

-Andi