ssume that file names are
     the same from host to host.

  6. The system needs a simple library version number abstraction, so
     that shared libraries can be upgraded in place.  The programmer
     should be informed how to design the interfaces to the library to
     maximize binary compatibility.

  7. The install 'Makefile' target should warn the package installer to
     set the proper environment variables ('LD_LIBRARY_PATH' or
     equivalent), or run 'ldconfig'.

