On Tue, Jun 21, 2005 at 01:14:25PM -0500, James Chacon wrote:
> BTW: -ffreestanding doesn't even imply it's what I would be using for
> this:
> 
>        -ffreestanding
>            Assert that compilation takes place in a freestanding environment.
>            This implies -fno-builtin.  A freestanding environment is one in
>            which the standard library may not exist, and program startup may
>            not necessarily be at "main".  The most obvious example is an OS
>            kernel.  This is equivalent to -fno-hosted.

Actually, it does say all the necessary thing.

(a) The standard library may not exist. --> can't depend on the behaviour
(b) -fno-builtin is the more important part.

If you consider printf a partial builtin like e.g. sqrt under certain
circumstances, it makes a lot more sense.

Joerg