make update problem?

[Glenn E. Sieb]

I'm trying to update a box from 5.1-RELEASE-p17 to 
5.3-RELEASE-current-p-level.

In preparation, I checked out 5.3-RELEASE from cvsup the other day:

(from my supfile:)
*default release=cvs tag=RELENG_5_3
*default delete use-rel-suffix

Then, just to be sure I've got what I need, I went to do a make update 
today (I just wanted to make sure I had the latest patch release before 
I did the build):

# make update
"Makefile.inc1", line 830: warning: String comparison operator should be 
either == or !=
"Makefile.inc1", line 830: Malformed conditional ((!defined(NO_RESCUE) 
||  defined(RELEASEDIR)) &&  (${TARGET_ARCH} != ${MACHINE_ARCH} || 
${BOOTSTRAPPING} < 501101))
"Makefile.inc1", line 830: Missing dependency operator
"Makefile.inc1", line 832: if-less endif
"Makefile.inc1", line 832: Need an operator
make: fatal errors encountered -- cannot continue
*** Error code 1

Stop in /usr/src.

This also happens if I try a make clean (which I usually do before I do 
any major builds, to be sure there's no cruft anywhere...):

 make clean
"Makefile.inc1", line 830: warning: String comparison operator should be 
either == or !=
"Makefile.inc1", line 830: Malformed conditional ((!defined(NO_RESCUE) 
||  defined(RELEASEDIR)) &&  (${TARGET_ARCH} != ${MACHINE_ARCH} || 
${BOOTSTRAPPING} < 501101))
"Makefile.inc1", line 830: Missing dependency operator
"Makefile.inc1", line 832: if-less endif
"Makefile.inc1", line 832: Need an operator
make: fatal errors encountered -- cannot continue
*** Error code 1

Stop in /usr/src.

Thanks in advance!

Best,
--Glenn