Re: definition for __builtin_constant_p and __outb_p

Stephen Williams (steve@icarus.icarus.com)
Fri, 19 Sep 1997 23:24:15 +0800


where is the definition for __builtin_constant_p and __outb_p in
linux kernel source code? I find these function ( macro?) used in
include/asm/io.h, but I can not find any definition for them.

davem@jenolan.rutgers.edu said:
> They are "magic" and embedded internally inside of GCC itself.

I really wish that the GCC documentation mentioned them, because I could
use them in my own embedded O/S.

Does anybody have notes lying around that describe these things?

-- 
Steve Williams
steve@icarus.com
steve@picturel.com

"The woods are lovely, dark and deep. But I have promises to keep, And lines to code before I sleep, And lines to code before I sleep."