breakage upgrading from 5.3-RC1 to 5.3-RELEASE

buildworld is failing during the rebuild of texinfo's makeinfo.  The
source tree was a clean copy of 5.3-RC1, upgraded to RELENG_5_3 earlier
today. /etc/make.conf was empty. Any suggestions?  

Nick

# rm -rf /usr/obj/*
# cd /usr/src
# make cleandir
[...]
# make cleandir
[...]
# uname -a 
FreeBSD xxxxx 5.3-RC1 FreeBSD 5.3-RC1 #0: Sun Oct 24 10:43:38 IST 2004     nick_at_xxxx:/data/usr.src/src/sys/i386/compile/GENERIC  i386
# cvsup -L 2 ~nick/cvsup/5.3-supfile <to RELENG_5_3>
# make buildworld
[...]
cc -O -pipe -DHAVE_CONFIG_H -DLOCALEDIR=\"/usr/share/locale\"  -I/data/usr.src/src/gnu/usr.bin/texinfo/makeinfo/../../../../contrib/texinfo -I/data/usr.src/src/gnu/usr.bin/texinfo/makeinfo/../../../../contrib/texinfo/lib  -I/usr/obj/data/usr.src/src/i386/legacy/usr/include  -static -L/usr/obj/data/usr.src/src/i386/legacy/usr/lib -o makeinfo cmds.o defun.o files.o footnote.o html.o index.o insertion.o lang.o macro.o makeinfo.o multi.o node.o sectioning.o toc.oxml.o /data/usr.obj/data/usr.src/src/i386/data/usr.src/src/gnu/usr.bin/texinfo/makeinfo/../libtxi/libtxi.a -legacy
cmds.o(.text+0x128b): In function `cm_center':
: undefined reference to `xmalloc'
defun.o(.text+0x3f): In function `accumulate_token':
: undefined reference to `xrealloc'
defun.o(.text+0x13c): In function `args_from_string':
: undefined reference to `xstrdup'
defun.o(.text+0x22a): In function `args_from_string':
: undefined reference to `substring'
[piles more undefined references to these names]