-BOOST_FILESYSTEM = -lboost_filesystem
-BOOST_REGEX = -lboost_regex
-BOOST_SIGNALS = -lboost_signals
-BOOST_IOSTREAMS = -lboost_iostreams
+BOOST_REGEX = -lboost_regex$(BOOST_MT)
+BOOST_SIGNALS = -lboost_signals$(BOOST_MT)
+BOOST_LIBS = $(BOOST_REGEX) $(BOOST_SIGNALS)