modular xorg: undefined reference to `drmOpenOnce'

[Per olof Ljungmark]

Took the dive and tested to build according to
http://wikitest.freebsd.org/ModularXorg
Sources are from today (2007-01-02)

Everything went fine until
cd /usr/ports/x11/xorg-apps && make install clean

where I had the below error.

Clues?

cc -O2 -fno-strict-aliasing -pipe -Wall -Wpointer-arith 
-Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations 
-Wnested-externs -o compiz main.o privates.o texture.o display.o 
screen.o window.o event.o paint.o option.o plugin.o session.o 
-Wl,--export-dynamic  -L/usr/local/lib -L/usr/X11R6/lib -lpng -lz 
/usr/X11R6/lib/libXcomposite.so /usr/X11R6/lib/libXdamage.so 
/usr/X11R6/lib/libXfixes.so /usr/X11R6/lib/libXrandr.so 
/usr/X11R6/lib/libXrender.so /usr/X11R6/lib/libXinerama.so 
/usr/X11R6/lib/libXext.so /usr/local/lib/libstartup-notification-1.so 
/usr/X11R6/lib/libSM.so /usr/X11R6/lib/libICE.so 
/usr/X11R6/lib/libX11.so /usr/X11R6/lib/libXau.so 
/usr/X11R6/lib/libXdmcp.so -lrpcsvc -lGL -lm -Wl,--rpath 
-Wl,/usr/X11R6/lib -Wl,--rpath -Wl,/usr/local/lib -Wl,--rpath 
-Wl,/usr/X11R6/lib -Wl,--rpath -Wl,/usr/local/lib
/usr/X11R6/lib/libGL.so: undefined reference to `drmOpenOnce'
/usr/X11R6/lib/libGL.so: undefined reference to `drmCloseOnce'
*** Error code 1

Stop in /usr/ports/x11-wm/compiz/work/compiz-0.3.6/src.
*** Error code 1

Stop in /usr/ports/x11-wm/compiz/work/compiz-0.3.6.
*** Error code 1

Stop in /usr/ports/x11-wm/compiz/work/compiz-0.3.6.
*** Error code 1

Stop in /usr/ports/x11-wm/compiz.
*** Error code 1

Stop in /usr/ports/x11/xorg-apps.