Decent multiarch with make O=

runqemu

@@ -43,8 +43,7 @@ done
 shift "$(($OPTIND - 1))"
 extra_flags="$extra_flags $@"
 
-./setoutarch "$arch"
-buildroot_out_dir='./buildroot/output'
+buildroot_out_dir="./buildroot/output.${arch}~"
 images_dir="$buildroot_out_dir/images"
 qemu_common="\
 $debug_qemu \
@@ -62,6 +61,7 @@ case "$arch" in
     cmd="$qemu_common \
       -M pc \
       -append 'root=/dev/vda $extra_append' \
+      -device edu \
       -drive file=${images_dir}/rootfs.ext2,if=virtio,format=raw \
       -kernel ${images_dir}/bzImage \
       -net nic,model=virtio \