Hi, all.

I got a bug report (http://bugs.gentoo.org/show_bug.cgi?id=138536) about
UML 2.6.16-bs2 failing to build.  I've checked it out, and it fails to
build because CONFIG_MK7 is set, which sets CONFIG_X86_USE_3DNOW, which
causes asm/arch/string.h to pull in asm/mmx.h, which doesn't exist
(because it's in asm/arch/mxx.h, this being UML).  The obvious solution
is to symlink it in, but this raises another question:

How useful are the various arch settings when building UML?  Does it
actually make a difference if I build with K7 rather than i686?  If so,
this should probably be fixed.  If not, the options to select ARCHES
should probably be removed when configuring UML.

Daniel