Fresh install ports tree using svn.  
lastest revision my ports tree is r357566


looks smokeping cant find RRDp.pm 
root@sfc-monitor:/usr/local/lib/perl5 # find . -name "RRDp.pm"
./site_perl/5.16/RRDp.pm
root@sfc-monitor:/usr/local/lib/perl5 #



--------------------------------------------
checking for gnumake... no
checking for gmake... /usr/local/bin/gmake
checking checking for gnu make availablility... /usr/local/bin/gmake is GNU make
checking checking for perl module 'RRDs'... Failed
checking checking for perl module 'FCGI'... Ok
checking checking for perl module 'CGI'... Ok
checking checking for perl module 'CGI::Fast'... Ok
checking checking for perl module 'Config::Grammar'... Ok
checking checking for perl module 'Digest::HMAC_MD5'... Ok
checking checking for perl module 'LWP'... Ok

** Aborting Configure ******************************

   If you know where perl can find the missing modules, set
   the PERL5LIB environment variable accordingly.

   FIRST though, make sure that 'perl' starts the perl
   binary you want to use for SmokePing.

   Now you can install local copies of the missing modules
   by running

     ./setup/build-perl-modules.sh /usr/local/thirdparty

   The RRDs perl module is part of RRDtool. Either use the rrdtool
   package provided by your OS or install rrdtool from source.
   If you install from source, the RRDs module is located
   PREFIX/lib/perl

===>  Script "configure" failed unexpectedly.
Please report the problem to rodrigo@FreeBSD.org [maintainer] and attach the
"/usr/ports/net-mgmt/smokeping/work/smokeping-2.6.9/config.log" including the
output of the failure of your make command. Also, it might be a good idea to
provide an overview of all packages installed on your system (e.g. a
/usr/local/sbin/pkg-static info -g -Ea).
*** Error code 1