why I can not install gnome2

edwardq2266

bonobo-sample-controls.c: In function `main':
bonobo-sample-controls.c:130: `VERSION' undeclared (first use in this function)
bonobo-sample-controls.c:130: (Each undeclared identifier is reported only once
bonobo-sample-controls.c:130: for each function it appears in.)
gmake[3]: *** [bonobo-sample-controls.o] 错误 1
gmake[3]: Leaving directory `/usr/ports/x11-toolkits/libbonoboui/work/libbonoboui-2.4.3/samples/controls'
gmake[2]: *** [all-recursive] 错误 1
gmake[2]: Leaving directory `/usr/ports/x11-toolkits/libbonoboui/work/libbonoboui-2.4.3/samples'
gmake[1]: *** [all-recursive] 错误 1
gmake[1]: Leaving directory `/usr/ports/x11-toolkits/libbonoboui/work/libbonoboui-2.4.3'
gmake: *** [all] 错误 2
*** Error code 2

Stop in /usr/ports/x11-toolkits/libbonoboui.
*** Error code 1

Stop in /usr/ports/x11/gnomeapplets2.
*** Error code 1

Stop in /usr/ports/x11/gnome2.