freebsd stable - Jun 2010 - problems building amd64 kernel, cvsup 3 hours ago, no apparent change since

RELENG_8 - cvsup appx 15:00 PDT

1.  performed 'make clean' followed by 'make buildworld'.  Build
complained that the architecture "amd64:i386" did not exist (I think
that was the correct error message) on line 139 of Makefile.inc1 .

2.  performed 'make buildworld TARGET=amd64' to force the build target.
  Everything appeared to work until the lib/libc target was reached, at
which point an error on line 3 of syscall.S 'invalid register name
%r10'.

It appears that architecture selection is not working properly, and it
prevents libc build from its compiling assembly language files.

uname output

FreeBSD hack.SFT.local 8.0-STABLE FreeBSD 8.0-STABLE #0: Wed Apr  7
11:02:24 PDT 2010     root@hack.SFT.local:/usr/obj/usr/src/sys/GENERIC
amd64