Error building kdenetwork-4.5.1

[Angelo Turetta]

  [ 45%] Building CXX object 
kget/transfer-plugins/bittorrent/CMakeFiles/kget_bittorrentfactory.dir/bttransfer.o
In file included from /usr/local/include/torrent/torrent.h:43,
                  from 
/space/usr/ports/net/kdenetwork4/work/kdenetwork-4.5.1/kget/transfer-plugins/bittorrent/bttransfer.cpp:24:
/usr/local/include/torrent/download.h:43:31: error: sigc++/connection.h: 
No such file or directory
/usr/local/include/torrent/download.h:44:34: error: 
sigc++/functors/slot.h: No such file or directory


Thanks for any workaround...

Angelo Turetta