installworld problem

doing installworld i'm getting this:

ln -fs libbz2.so.2 /usr/lib/libbz2.so
install -C -o root -g wheel -m 444
/usr/src/lib/libbz2/../../contrib/bzip2/bzlib.h /usr/include
===> lib/libc (install)
install -C -o root -g wheel -m 444   libc.a /usr/lib
install -C -o root -g wheel -m 444   libc_p.a /usr/lib
install -s -o root -g wheel -m 444   -fschg -S  libc.so.7 /lib
ln -fs /lib/libc.so.7  /usr/lib/libc.so
/libexec/ld-elf.so.1: /lib/libc.so.7: version FBSD_1.0 required by ln not
defined
*** Error code 1

Stop in /usr/src/lib/libc.
*** Error code 1

Stop in /usr/src/lib.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.

cvsuped yesterday

[xnet] /usr/src> uname -a
/libexec/ld-elf.so.1: /lib/libc.so.7: version FBSD_1.0 required by uname not
defined