Build error: OpenOffice.org-2

Hi list,

I've got the following error message during building 
/usr/ports/editors/openoffice.org-2 (my system is
7-Current amd64):

mkdir ./unxfbsdx.pro/misc/build/xt-20051206/
cd ./unxfbsdx.pro/misc/build/xt-20051206/ && dmake  product="full"  && touch /d2/ports/editors/openoffice.org-2/work/OOF680_m18/xt/./unxfbsdx.pro/misc/build/so_built_xt
-------------
/usr/local/bin/ant -Dprj=../../../.. -Dprjname=xt -Ddebug=off -Doptimize=on  -Dtarget=compile -Dsolar.update=on -Dout=../../../../unxfbsdx.pro -Dinpath=unxfbsdx.pro -Dproext=".pro"  -Dsolar.bin=/d2/ports/editors/openoffice.org-2/work/OOF680_m18/solver/680/unxfbsdx.pro/bin -Dsolar.jar=/d2/ports/editors/openoffice.org-2/work/OOF680_m18/solver/680/unxfbsdx.pro/bin -Dsolar.doc=/d2/ports/editors/openoffice.org-2/work/OOF680_m18/solver/680/unxfbsdx.pro/doc  -Dcommon.jar=/d2/ports/editors/openoffice.org-2/work/OOF680_m18/solver/680/unxfbsdx.pro/bin -Dcommon.doc=  -Dsolar.sourceversion=OOF680 -Dsolar.lastminor=m18  -Dsolar.build=9161 -f build.xml  -emacs
Buildfile: build.xml
/libexec/ld-elf.so.1: /lib/libpthread.so.2: Undefined symbol "_malloc_prefork"
dmake:  Error code 1, while making 'ANTBUILD'
'---* tg_merge.mk *---'
dmake:  Error code 255, while making './unxfbsdx.pro/misc/build/so_built_xt'
'---* tg_merge.mk *---'

ERROR: Error 65280 occurred while making /d2/ports/editors/openoffice.org-2/work/OOF680_m18/xt
dmake:  Error code 1, while making 'build_instsetoo_native'
'---*  *---'
*** Error code 255

Stop in /d2/ports/editors/openoffice.org-2.


Any tips?

Regards,
Serguey.