Dose clang support armv4

[Ian Lepore]

On Mon, 2018-03-12 at 10:43 -0600, Warner Losh wrote:
> Hi Mori-san,
> 
> I've not tried my armv4 boards with clang 6 yet.
> 
> However, you are hanging in mountroot. What's normally printed there?
> Ian
> just did some things to fix it for USB ad ZFS. Maybe that broke this
> use
> case accidentally.
> 
> Warner
> 

Unfortunately, my only armv4/5 system that's anywhere close to bootable
 right now is a Dreamplug, and it also hangs at mountroot, but for a
different reason: somehow its ethernet driver gets a continuous "RX
error" interrupt storm (and my rootfs is on nfs).  I haven't had time
to try putting together a rootfs on sdcard or sata to see if it boots
all the way.

-- Ian