Should "make -DNOCLEAN buildworld" always rebuild clang?

[David Wolfskill]

As some of you may be aware, I track stable/9 daily.  (A recent history
of "uname -vp" outputs for stable/9 on my laptop may be seen at
<http://www.catwhisker.org/~david/FreeBSD/history/laptop_i386_9.txt>.)

And lest this message is misinterpreted: I am not complaining.  In
particular, I am not complaining about clang: I switched to using clang
for the system-build compiler shortly after BSDCan 2012, and I've never
looked back.  I'm very happy to have an alternative to gcc.

Yesterday, I had built r251096M; this morning, I updated to r251113M
and rebuilt with "touch /sys/conf/newvers.sh && make -j4 -DNOCLEAN
buildworld".  (Copy of typescript file available at
<http://www.catwhisker.org/~david/FreeBSD/stable_9/bw.txt>.)

As shown in the typescript, the sole change showed up as:

Script started on Thu May 30 04:22:12 2013
svn update /usr/src
Updating '/usr/src':
U    /usr/src/usr.sbin/newsyslog/newsyslog.c
Updated to revision 251129.

Script done on Thu May 30 04:22:18 2013


which would seem to have had minimal effect on the toolchain.

Yet the vast bulk of the above-cited typescript appears to be showing
the toolchain being rebuilt.  Is this intended?

Some other salient bits:

/etc/src.conf:

d129(9.1-S)[2] cat /etc/src.conf 
KERNCONF=CANARY
PORTS_MODULES=x11/nvidia-driver
CC=clang
CXX=clang++
CPP=clang-cpp
WITH_LIBCPLUSPLUS=yes
d129(9.1-S)[3] 

/etc/make.conf:

d129(9.1-S)[3] cat /etc/make.conf
SENDMAIL_MC=/etc/mail/laptop.mc
NET_SNMP_SYS_CONTACT="david at catwhisker.org"
NET_SNMP_SYS_LOCATION="variable"
NET_SNMP_LOGFILE=/var/log/snmpd.log
NET_SNMP_PERSISTENTDIR=/var/net-snmp
WITH_BSD_JDK=TRUE
FORCE_PKG_REGISTER=     NO
# For mplayer
WITHOUT_RUNTIME_CPUDETECTION=   YES
WITH_OPTIMIZED_CFLAGS=  YES
WITHOUT_CJK=    YES
NO_SUID_XSERVER=YES
# For Linux compat
OVERRIDE_LINUX_BASE_PORT=f10
OVERRIDE_LINUX_NONBASE_PORTS=f10
# added by use.perl 2012-09-16 05:37:23
PERL_VERSION=5.14.2
INSTALL_AS_NCFTP=yes
WITHOUT_PKGNG=  YES
d129(9.1-S)[4] 

Thanks.

Peace,
david
-- 
David H. Wolfskill				david at catwhisker.org
Taliban: Evil men with guns afraid of truth from a 14-year old girl.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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