Earlier I said that I on my unclean system it builds ok through ./configure
&& make
Today I went ahead and setup cowbuilder/pbuilder in order to build on a
clean system. Of course the build failed.
Then it hit me. On my unclean system I had manually packaged and installed
libtorrent 0.16.16 while the official version is at 0.16.13. I reverted
back to libtorrent 0.16.13 from the Debian repos and now my ./configure &&
make on my unclean system also fails.
So you probably have to package a newer libtorrent version and try again.