~/src/ledger$ otool -L ledger
ledger:
       	/usr/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 7.0.0)
	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 476.19.0)
        /opt/local/lib/libboost_serialization-d.dylib (compatibility version 0.0.0, current version 0.0.0)
	/opt/local/lib/libboost_iostreams-d.dylib (compatibility version 0.0.0, current version 0.0.0)
	/opt/local/lib/libboost_filesystem-d.dylib (compatibility version 0.0.0, current version 0.0.0)
        /opt/local/lib/libboost_system-d.dylib (compatibility version 0.0.0, current version 0.0.0)
	/opt/local/lib/libboost_date_time-d.dylib (compatibility version 0.0.0, current version 0.0.0)
	/opt/local/lib/libboost_regex-d.dylib (compatibility version 0.0.0, current version 0.0.0)
        /usr/lib/libedit.2.dylib (compatibility version 2.0.0, current version 2.9.0)
	/opt/local/lib/libmpfr.1.dylib (compatibility version 4.0.0, current version 4.0.0)
	/opt/local/lib/libgmp.3.dylib (compatibility version 9.0.0, current version 9.0.0)
        /usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 7.4.0)
	/usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.4)
~/src/ledger$ port installed boost
The following ports are currently installed:
  boost @1.35.0_0+darwin_9+python25
  boost @1.37.0_0+darwin_9+debug+python25+st
  boost @1.40.0_1+debug+python26+st (active)