Problems compiling kdelibs under RELENG_5

I upgraded on RELENG_5, but while compiling kdelibs3, I have the
following error:

gmake[3]: Entering directory
`/usr/ports/x11/kdelibs3/work/kdelibs-3.2.3/kdecore'
../dcop/dcopidl/dcopidl ./ksycoca.h > ksycoca.kidl || ( rm -f
ksycoca.kidl ; false )
Fatal error 'Spinlock called when not threaded.' at line 83 in file
/usr/src/lib/libpthread/thread/thr_spinlock.c (errno = 0)
Abort trap (core dumped)
gmake[3]: *** [ksycoca.kidl] Error 1
gmake[3]: Leaving directory
`/usr/ports/x11/kdelibs3/work/kdelibs-3.2.3/kdecore'
gmake[2]: *** [all-recursive] Error 1
gmake[2]: Leaving directory
`/usr/ports/x11/kdelibs3/work/kdelibs-3.2.3/kdecore'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/usr/ports/x11/kdelibs3/work/kdelibs-3.2.3'
gmake: *** [all] Error 2
*** Error code 2

Stop in /usr/ports/x11/kdelibs3.


What I am doing bad?

Thanks. TR