$ otool -L libboost_iostreams-mt.dylib libboost_iostreams-mt.dylib: /opt/local/lib/libboost_iostreams-mt.dylib (compatibility version 0.0.0, current version 0.0.0) /opt/local/lib/libbz2.1.0.dylib (compatibility version 1.0.0, current version 1.0.6) /opt/local/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.8) /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version