-BOOST_FILESYSTEM = $(top_builddir)/boost/libs/filesystem/src/libboost_filesystem.la
-BOOST_REGEX = $(top_builddir)/boost/libs/regex/src/libboost_regex.la
-BOOST_SIGNALS = $(top_builddir)/boost/libs/signals/src/libboost_signals.la
-BOOST_IOSTREAMS = $(top_builddir)/boost/libs/iostreams/src/libboost_iostreams.la