[head tinderbox] failure on mips/mips

[FreeBSD Tinderbox]

TB --- 2011-11-26 00:45:51 - tinderbox 2.8 running on freebsd-current.sentex.ca
TB --- 2011-11-26 00:45:51 - starting HEAD tinderbox run for mips/mips
TB --- 2011-11-26 00:45:51 - cleaning the object tree
TB --- 2011-11-26 00:45:54 - cvsupping the source tree
TB --- 2011-11-26 00:45:54 - /usr/bin/csup -z -r 3 -g -L 1 -h cvsup.sentex.ca /tinderbox/HEAD/mips/mips/supfile
TB --- 2011-11-26 00:46:07 - building world
TB --- 2011-11-26 00:46:07 - CROSS_BUILD_TESTING=YES
TB --- 2011-11-26 00:46:07 - MAKEOBJDIRPREFIX=/obj
TB --- 2011-11-26 00:46:07 - PATH=/usr/bin:/usr/sbin:/bin:/sbin
TB --- 2011-11-26 00:46:07 - SRCCONF=/dev/null
TB --- 2011-11-26 00:46:07 - TARGET=mips
TB --- 2011-11-26 00:46:07 - TARGET_ARCH=mips
TB --- 2011-11-26 00:46:07 - TZ=UTC
TB --- 2011-11-26 00:46:07 - __MAKE_CONF=/dev/null
TB --- 2011-11-26 00:46:07 - cd /src
TB --- 2011-11-26 00:46:07 - /usr/bin/make -B buildworld
>>> World build started on Sat Nov 26 00:46:07 UTC 2011
>>> Rebuilding the temporary build tree
>>> stage 1.1: legacy release compatibility shims
>>> stage 1.2: bootstrap tools
>>> stage 2.1: cleaning up the object tree
>>> stage 2.2: rebuilding the object tree
>>> stage 2.3: build tools
>>> stage 3: cross tools
>>> stage 4.1: building includes
>>> stage 4.2: building libraries
[...]
c++ -fpic -DPIC  -O -pipe -G0 -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/memory.cc -o memory.So
c++ -fpic -DPIC  -O -pipe -G0 -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/auxhelper.cc -o auxhelper.So
c++ -fpic -DPIC  -O -pipe -G0 -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/exception.cc -o exception.So
c++ -fpic -DPIC  -O -pipe -G0 -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/stdexcept.cc -o stdexcept.So
c++ -fpic -DPIC  -O -pipe -G0 -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/typeinfo.cc -o typeinfo.So
c++ -fpic -DPIC  -O -pipe -G0 -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/guard.cc -o guard.So
building shared library libcxxrt.so.1
/obj/mips.mipsel/src/tmp/usr/bin/ld: cannot find -lpthread
*** Error code 1

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

Stop in /src.
*** Error code 1

Stop in /src.
*** Error code 1

Stop in /src.
*** Error code 1

Stop in /src.
TB --- 2011-11-26 00:58:00 - WARNING: /usr/bin/make returned exit code  1 
TB --- 2011-11-26 00:58:00 - ERROR: failed to build world
TB --- 2011-11-26 00:58:00 - 547.89 user 123.61 system 728.79 real


http://tinderbox.freebsd.org/tinderbox-head-HEAD-mips-mips.full