ports最新に更新してrrdtoolをインストールしようとしたらエラー吐かれました。
どこが悪いんだろう・・・

# pwd
/usr/ports/net/rrdtool
# make
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Makefile:144: Commands for `/usr/local/lib/ruby/1.8/i386-freebsd6/RRD.so' will be ignored in favor of those for`RRD.so'.
gmake[4]: Circular /usr/local/lib/ruby/1.8/i386-freebsd6/RRD.so <- /usr/local/lib/ruby/1.8/i386-freebsd6/RRD.so dependency dropped.
cc -I. -I. -I/usr/local/lib/ruby/1.8/i386-freebsd6 -I. -I../../src -fPIC -O2 -fno-strict-aliasing -pipe -fPIC -c main.c
/usr/bin/install -c -o root -g wheel -m 0755 RRD.so /usr/local/lib/ruby/1.8/i386-freebsd6
install: RRD.so: No such file or directory
gmake[4]: *** [/usr/local/lib/ruby/1.8/i386-freebsd6/RRD.so] Error 71
gmake[4]: Leaving directory `/usr/ports/net/rrdtool/work/rrdtool-1.2.23/bindings/ruby'
gmake[3]: *** [ruby] Error 2
gmake[3]: Leaving directory `/usr/ports/net/rrdtool/work/rrdtool-1.2.23/bindings'
gmake[2]: *** [all-recursive] Error 1
gmake[2]: Leaving directory `/usr/ports/net/rrdtool/work/rrdtool-1.2.23/bindings'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/usr/ports/net/rrdtool/work/rrdtool-1.2.23'
gmake: *** [all] Error 2
*** Error code 2

Stop in /usr/ports/net/rrdtool.
*** Error code 1

Stop in /usr/ports/net/rrdtool.