RELENG_8 buildworld broken?

[Pieter de Goeje]

I've blown away /usr/obj, checked out a fresh source tree, but no luck:

cc -O2 -pipe  -DHAVE_GTHR_DEFAULT -DIN_GCC -DIN_TARGET_LIBS -I. -I/data/FreeBSD/FreeBSD-8.x/src/gnu/lib/libobjc/../../usr.bin/cc/cc_tools -I/data/FreeBSD/FreeBSD-8.x/src/gnu/lib/libobjc/../../../contrib/libobjc/objc -I/data/FreeBSD/FreeBSD-8.x/src/gnu/lib/libobjc/../../../contrib/libobjc -I/data/FreeBSD/FreeBSD-8.x/src/gnu/lib/libobjc/../../../contrib/gcc/config -I/data/FreeBSD/FreeBSD-8.x/src/gnu/lib/libobjc/../../../contrib/gcc -I/data/FreeBSD/FreeBSD-8.x/src/gnu/lib/libobjc/../../../contrib/gcclibs/include -fexceptions -frandom-seed=RepeatabilityConsideredGood -std=gnu99 -fstack-protector  -c /data/FreeBSD/FreeBSD-8.x/src/gnu/lib/libobjc/../../../contrib/libobjc/encoding.c
In file included from ./tm.h:4,                 
from /data/FreeBSD/FreeBSD-8.x/src/gnu/lib/libobjc/../../../contrib/libobjc/encoding.c:34:
./options.h:457: error: redeclaration of enumerator 'OPT_Werror'
./options.h:398: error: previous definition of 'OPT_Werror' was here
*** Error code 1

Stop in /data/FreeBSD/FreeBSD-8.x/src/gnu/lib/libobjc.
*** Error code 1

When trying to build on:
FreeBSD 8.0-STABLE #9: Tue Dec  1 21:48:13 CET 2009     amd64

- Pieter de Goeje