Re: [2.6 patch] re-add -ffreestanding

From: Adrian Bunk
Date: Mon Aug 21 2006 - 17:47:42 EST

On Mon, Aug 21, 2006 at 11:24:44PM +0200, Andi Kleen wrote:
> On Mon, 21 Aug 2006 23:21:54 +0200
> Adrian Bunk <bunk@xxxxxxxxx> wrote:
> > I got the following compile error with gcc 4.1.1 when trying to compile
> > kernel 2.6.18-rc4-mm2 for m68k:
> I object to this change. -ffreestanding shouldn't be forced on everybody


The Linux kernel is a freestanding environment.

Omitting -ffreestanding only for allowing gcc to automatically use
builtins isn't a good idea (as we have already seen).

We can easily enable as many gcc builtins as we want.
We could even do this for all platforms in include/linux/string.h

It might make sense to do this properly since it could e.g. be the gcc
builtins produce no worse code than the inlines in

But if this should be done, let's do it right and explicitely.

> -Andi



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