which libs are linked against

otool -L /sw/lib/libgmt.4.dylib
/sw/lib/libgmt.4.dylib:
	/sw/lib/libgmt.4.dylib (compatibility version 4.0.0, current version 4.5.9)
	/sw/lib/libnetcdf.7.dylib (compatibility version 10.0.0, current version 10.0.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 169.3.0)