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checking for exit in -lboost_system... yes
configure: Boost.System LIB: "-lboost_system"
checking for libtorrent... no
configure: error: Package requirements (libtorrent-rasterbar >= 1.2.12) were not met:

Requested 'libtorrent-rasterbar >= 1.2.12' but version of libtorrent-rasterbar is 1.2.6

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

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