On Mon, Nov 07, 2005 at 10:30:46AM -0600, John D. Baker wrote:
> When I build a kernel with any CPU-specific optimization flags
> (-march=pentium-mmx, -march=pentium or even just -mcpu=pentium-mmx,
> -mcpu=pentium which should produce i386-compatible code), the resulting
> kernel hangs immediately upon loading.

Yeah, the pentium targets do not work, pentium2 does work (on other machines).
I think there is a PR about it, it is likely a gcc bug.

Martin