This is on -current with pkgsrc HEAD from about two days ago:

 cc -DHAVE_CONFIG_H -I. -I../.. -I../../sysdeps/freebsd -I../../include -I/usr/pkgsrc/sysutils/libgtop2/work/.buildlink/include/glib/glib-2.0 -I/usr/pkgsrc/sysutils/libgtop2/work/.buildlink/lib/glib-2.0/include -DHAVE_STATVFS_READS_COUNT -DHAVE_STATVFS_WRITES_COUNT -I/usr/pkgsrc/sysutils/libgtop2/work/.buildlink/include -I/usr/include/krb5 -Winline -Wall -std=gnu89 -Wchar-subscripts -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wcast-align -Wsign-compare -fno-strict-aliasing -O2 -MT proctime.lo -MD -MP -MF .deps/proctime.Tpo -c proctime.c  -fPIC -DPIC -o .libs/proctime.o
proctime.c: In function `calcru':
proctime.c:74: warning: unused variable `tv'
proctime.c: In function `glibtop_get_proc_time_p':
proctime.c:128: error: storage size of `pstats' isn't known
proctime.c:128: warning: unused variable `pstats'
gmake[3]: *** [proctime.lo] Error 1


		--Steven M. Bellovin, http://www.cs.columbia.edu/~smb