mount_union and OBSD 3.5

From: clvrmnky (clvrmnky-uunet_at_coldmail.com.invalid)
Date: 09/29/04 

Date: Wed, 29 Sep 2004 10:50:01 -0400

Are there known problems with mount_union and OpenBSD 3.5? I usually
create a CD with the contents of src.tar.gz, and mount that to /usr/src
via mount_union:

# mount /dev/cd0a /mnt
# mount -t union -o -b /mnt /usr/src

This works a treat on 3.1.

I did this on 3.5 with a new CD I burned, and applied all the relevant
patches to the source tree. The first thing I decided to rebuild is
cvs, as it was first on the patch list.

Unfortunately, "make" cannot open up or access the Makefile (sorry, I
forgot the actual message.) umounting hung the box solid. I had to
kill the power.

I just reminded myself that perhaps my image doesn't have the empty
"obj" directories required. I'm still concerned that mount_union is
flaky (again?). I know it's use was once warned against. Is this still
the case? A Google search came up short, and searching tech@ is a pain.

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