libgtop2 build failed

[wsk]

hi,list:
build the libgtop2 failed with following errors:
cc -DHAVE_CONFIG_H -I. -I. -I../.. -D_IN_LIBGTOP -D_GNU_SOURCE
-DGLIBTOP_NAMES -I../.. -I../.. -I../../sysdeps/freebsd -I../../include
-I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -Winline
-Wall -std=gnu89 -Wchar-subscripts -Wmissing-declarations
-Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wcast-align
-Wsign-compare -fno-strict-aliasing -O2 -fno-strict-aliasing -pipe
-I/usr/X11R6/include -DGTOPLOCALEDIR=\"/usr/X11R6/share/locale\"
-DLIBGTOP_VERSION=\"2.8.1\" -DLIBGTOP_SERVER_VERSION=\"5\"
-DLIBGTOP_VERSION_CODE=2008001
-DLIBGTOP_SERVER=\"/usr/X11R6/bin/libgtop_server2\" -I/usr/local/include
-Winline -Wall -std=gnu89 -Wchar-subscripts -Wmissing-declarations
-Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wcast-align
-Wsign-compare -fno-strict-aliasing -O2 -fno-strict-aliasing -pipe -c
procmap.c -fPIC -DPIC -o .libs/procmap.o
procmap.c: In function `glibtop_get_proc_map_p':
procmap.c:275: error: structure has no member named `v_cachedid'
procmap.c:276: error: structure has no member named `v_cachedfs'
gmake[3]: *** [procmap.lo] Error 1
gmake[3]: Leaving directory
`/usr/ports/devel/libgtop2/work/libgtop-2.8.1/sysdeps/freebsd'
gmake[2]: *** [all-recursive] Error 1
gmake[2]: Leaving directory
`/usr/ports/devel/libgtop2/work/libgtop-2.8.1/sysdeps'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/usr/ports/devel/libgtop2/work/libgtop-2.8.1'
gmake: *** [all-recursive-am] Error 2
*** Error code 2

Stop in /usr/ports/devel/libgtop2.


any ideas?