I've cvs'ed /usr/xsrc and /usr/src (with netbsd-2-0 tag). When building 
with 'sh build.sh -x -u -T /usr/tools -M /usr/obj -D /usr/build distribution'
I get an 'undefined reference to `openpty''. Looks like a missing -lutil.

[...]
dependall ===> bin/xconsole
#    create  xconsole/xconsole.d
CC=/usr/tools/bin/i386--netbsdelf-gcc /usr/tools/bin/nbmkdep -f xconsole.d --      -DCSRG_BASED -DFUNCPROTO=15 -DNARROWPROTO -I/usr/build/usr/X11R6/include  -nostdinc -isystem /usr/build/usr/include   /usr/xsrc/xfree/xc/programs/xconsole/xconsole.c
#    create  xconsole/.depend
rm -f .depend
CC=/usr/tools/bin/i386--netbsdelf-gcc /usr/tools/bin/nbmkdep -d -f .depend -s .o\ .ln xconsole.d
#   compile  xconsole/xconsole.o
/usr/tools/bin/i386--netbsdelf-gcc -O2   -Werror   -DCSRG_BASED -DFUNCPROTO=15 -DNARROWPROTO -I/usr/build/usr/X11R6/include  -nostdinc -isystem /usr/build/usr/include  -c    /usr/xsrc/xfree/xc/programs/xconsole/xconsole.c
#      link  xconsole/xconsole
/usr/tools/bin/i386--netbsdelf-gcc -Wl,-nostdlib   -Wl,-rpath-link,/usr/build/usr/X11R6/lib  -R/usr/X11R6/lib  -L/usr/build/usr/X11R6/lib   -o xconsole  -Wl,-rpath-link,/usr/build/lib:/usr/build/usr/lib  -L/usr/build/lib  -B/usr/build/usr/lib/ -B/usr/build/usr/lib/   xconsole.o -lXaw -lXmu -lXt -lSM -lICE -lXpm -lXext -lX11   -L/usr/build/usr/lib -L/usr/build/usr/lib
xconsole.o(.text+0xd5c): In function `get_pty':
: undefined reference to `openpty'
collect2: ld returned 1 exit status

*** Failed target:  xconsole
*** Failed command: /usr/tools/bin/i386--netbsdelf-gcc -Wl,-nostdlib -Wl,-rpath-link,/usr/build/usr/X11R6/lib -R/usr/X11R6/lib -L/usr/build/usr/X11R6/lib -o xconsole -Wl,-rpath-link,/usr/build/lib:/usr/build/usr/lib -L/usr/build/lib -B/usr/build/usr/lib/ -B/usr/build/usr/lib/ xconsole.o -lXaw -lXmu -lXt -lSM -lICE -lXpm -lXext -lX11 -L/usr/build/usr/lib -L/usr/build/usr/lib
*** Error code 1

Stop.
nbmake: stopped in /usr/src/x11/bin/xconsole

*** Failed target:  dependall
*** Failed command: cd /usr/src/x11/bin/xconsole; /usr/tools/bin/nbmake realall
*** Error code 1

Stop.
nbmake: stopped in /usr/src/x11/bin/xconsole

*** Failed target:  dependall-xconsole
*** Failed command: targ=dependall;dir=xconsole; case "$dir" in /*) echo "$targ ===> $dir"; cd "$dir"; /usr/tools/bin/nbmake "_THISDIR_=$dir/" $targ; ;; *) echo "$targ ===> bin/$dir"; cd "/usr/src/x11/bin/$dir"; /usr/tools/bin/nbmake "_THISDIR_=bin/$dir/" $targ; ;; esac
*** Error code 1

Stop.
nbmake: stopped in /usr/src/x11/bin

*** Failed target:  dependall-bin
*** Failed command: targ=dependall;dir=bin; case "$dir" in /*) echo "$targ ===> $dir"; cd "$dir"; /usr/tools/bin/nbmake "_THISDIR_=$dir/" $targ; ;; *) echo "$targ ===> $dir"; cd "/usr/src/x11/$dir"; /usr/tools/bin/nbmake "_THISDIR_=$dir/" $targ; ;; esac
*** Error code 1

Stop.
nbmake: stopped in /usr/src/x11

*** Failed target:  do-build
*** Failed command: (cd /usr/src/x11 && /usr/tools/bin/nbmake dependall)
*** Error code 1

Stop.
nbmake: stopped in /usr/src/x11

*** Failed target:  build
*** Failed command: (cd /usr/src/x11 && /usr/tools/bin/nbmake do-build)
*** Error code 1

Stop.
nbmake: stopped in /usr/src/x11

*** Failed target:  do-x11
*** Failed command: (cd /usr/src/x11 && /usr/tools/bin/nbmake build)
*** Error code 1

Stop.
nbmake: stopped in /usr/src

*** Failed target:  build
*** Failed command: (cd /usr/src && /usr/tools/bin/nbmake do-x11)
*** Error code 1

Stop.
nbmake: stopped in /usr/src

*** Failed target:  distribution
*** Failed command: (cd /usr/src && /usr/tools/bin/nbmake NOPOSTINSTALL=1 build)
*** Error code 1

Stop.
nbmake: stopped in /usr/src

ERROR: Failed to make distribution
*** BUILD ABORTED ***
#