toolchain/45620: MAKEDEV failures remains unoticed in miniroot build

[njoly%pasteur.fr@localhost]

>Number:         45620
>Category:       toolchain
>Synopsis:       MAKEDEV failures remains unoticed in miniroot build
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 17 00:25:00 +0000 2011
>Originator:     Nicolas Joly
>Release:        NetBSD 5.99.56
>Organization:
Insitut Pasteur
>Environment:
System: NetBSD lanfeust.sis.pasteur.fr 5.99.56 NetBSD 5.99.56 (LANFEUST) #10: 
Wed Nov 16 11:44:37 CET 2011 
njoly%lanfeust.sis.pasteur.fr@localhost:/local/src/NetBSD/obj.amd64/sys/arch/amd64/compile/LANFEUST
 amd64
Architecture: x86_64
Machine: amd64
>Description:
While cross-building sparc on my amd64 workstation, i luckily found that
MAKEDEV failures remains unoticed while building miniroot:

[...]
#     strip  instbin
#    create  miniroot/devices.spec
rm -f devices.spec devices.spec.tmp
MACHINE=sparc MACHINE_ARCH=sparc  /bin/sh 
/local/src/NetBSD/src/etc/obj.sparc/MAKEDEV -s all  | 
/local/src/NetBSD/tool/bin/nbsed -e '/^\. type=dir/d' -e 's,^\.,./dev,'  > 
devices.spec.tmp  && sort -o devices.spec devices.spec.tmp
/local/src/NetBSD/src/etc/obj.sparc/MAKEDEV: bpp: unknown device
/local/src/NetBSD/src/etc/obj.sparc/MAKEDEV: bpp: unknown device
#    create  miniroot/work.spec
rm -f work.spec work.spec.tmp
[...]

>How-To-Repeat:
Build sparc miniroot.
>Fix: