Build error (make related?)

[Angelo Turetta]

This morning I'm trying to update my current system
   (7.0-CURRENT #14: Mon Jul  9 21:55:06 CEST 2007)

and when I issue the usual

   #make buildworld KERNCONF="GENERIC VIDEO VIDEODBG" buildkernel

after 5 seconds I get:
(....)

--------------------------------------------------------------
 >>> stage 2.1: cleaning up the object tree
--------------------------------------------------------------
cd /usr/src; MAKEOBJDIRPREFIX=/usr/obj  MACHINE_ARCH=amd64 
MACHINE=amd64  CPUTYPE= 
GROFF_BIN_PATH=/usr/obj/usr/src/tmp/legacy/usr/bin 
GROFF_FONT_PATH=/usr/obj/usr/src/tmp/legacy/usr/share/groff_font 
GROFF_TMAC_PATH=/usr/obj/usr/src/tmp/legacy/usr/share/tmac 
_SHLIBDIRPREFIX=/usr/obj/usr/src/tmp  INSTALL="sh 
/usr/src/tools/install.sh" 
PATH=/usr/obj/usr/src/tmp/legacy/usr/sbin:/usr/obj/usr/src/tmp/legacy/usr/bin:/usr/obj/usr/src/tmp/legacy/usr/games:/usr/obj/usr/src/tmp/usr/sbin:/usr/obj/usr/src/tmp/usr/bin:/usr/obj/usr/src/tmp/usr/games:/sbin:/bin:/usr/sbin:/usr/bin 
make -f Makefile.inc1 DESTDIR=/usr/obj/usr/src/tmp par-cleandir
===> share/info (cleandir)
===> lib (cleandir)
===> lib/csu/amd64 (cleandir)
rm -f crt1.o crti.o crtn.o gcrt1.o
rm -f .depend GPATH GRTAGS GSYMS GTAGS
===> lib/libc (cleandir)
2 open conditionals:
           at line 10 (evaluated to true)
          at line 3 (evaluated to true)
make: fatal errors encountered -- cannot continue
*** Error code 1

Deleting /usr/obj/* doesn not change anything, and I already tried 
deleting /usr/src and re-cvsup. I've not seen any recent tinderbox 
error, so is there something I could try do on my part?

Thanks,
Angelo.