checking for STUFF... configure: error: Package requirements (sigc++-2.0 libcurl >= 7.12.0 libtorrent >= 0.12.0) were not met:

No package 'libtorrent' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables STUFF_CFLAGS
and STUFF_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.