[head tinderbox] failure on ia64/ia64

[FreeBSD Tinderbox]

TB --- 2011-11-26 00:41:12 - tinderbox 2.8 running on freebsd-current.sentex.ca
TB --- 2011-11-26 00:41:12 - starting HEAD tinderbox run for ia64/ia64
TB --- 2011-11-26 00:41:12 - cleaning the object tree
TB --- 2011-11-26 00:41:14 - cvsupping the source tree
TB --- 2011-11-26 00:41:14 - /usr/bin/csup -z -r 3 -g -L 1 -h cvsup.sentex.ca /tinderbox/HEAD/ia64/ia64/supfile
TB --- 2011-11-26 00:41:26 - building world
TB --- 2011-11-26 00:41:26 - CROSS_BUILD_TESTING=YES
TB --- 2011-11-26 00:41:26 - MAKEOBJDIRPREFIX=/obj
TB --- 2011-11-26 00:41:26 - PATH=/usr/bin:/usr/sbin:/bin:/sbin
TB --- 2011-11-26 00:41:26 - SRCCONF=/dev/null
TB --- 2011-11-26 00:41:26 - TARGET=ia64
TB --- 2011-11-26 00:41:26 - TARGET_ARCH=ia64
TB --- 2011-11-26 00:41:26 - TZ=UTC
TB --- 2011-11-26 00:41:26 - __MAKE_CONF=/dev/null
TB --- 2011-11-26 00:41:26 - cd /src
TB --- 2011-11-26 00:41:26 - /usr/bin/make -B buildworld
>>> World build started on Sat Nov 26 00:41:27 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  -O2 -pipe -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/memory.cc -o memory.So
c++ -fpic -DPIC  -O2 -pipe -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/auxhelper.cc -o auxhelper.So
c++ -fpic -DPIC  -O2 -pipe -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/exception.cc -o exception.So
c++ -fpic -DPIC  -O2 -pipe -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/stdexcept.cc -o stdexcept.So
c++ -fpic -DPIC  -O2 -pipe -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/typeinfo.cc -o typeinfo.So
c++ -fpic -DPIC  -O2 -pipe -I/src/lib/libcxxrt/../../contrib/libcxxrt -c /src/lib/libcxxrt/../../contrib/libcxxrt/guard.cc -o guard.So
building shared library libcxxrt.so.1
/obj/ia64.ia64/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 00:54:22 - WARNING: /usr/bin/make returned exit code  1 
TB --- 2011-11-26 00:54:22 - ERROR: failed to build world
TB --- 2011-11-26 00:54:22 - 605.08 user 125.61 system 790.70 real


http://tinderbox.freebsd.org/tinderbox-head-HEAD-ia64-ia64.full