- This will be useful for imported library dependencies
  - Replaces old cmTarget analyze-lib-depends stuff for linking
  - Formalizes graph construction and dump
  - Explicitly represents dependency inferral sets
  - Use BFS of initial dependencies to preserve order

  - Work-around bug in Watcom command line parsing for spaces in paths.
  - Add 'library' option before libraries specified by file path.

BUG: Be less aggressive about finding conflicts in the runtime path when the real soname is not known.

BUG: When a library file name is linked without a path make sure the link type is restored after the -l option.

  - This is purely an implementation improvement.  No interface has changed.
  - Create cmComputeLinkInformation class
  - Move and re-implement logic from:
      cmLocalGenerator::ComputeLinkInformation
      cmOrderLinkDirectories
  - Link libraries to targets with their full path (if it is known)
  - Dirs specified with link_directories command still added with -L
  - Make link type specific to library names without paths
    (name libfoo.a without path becomes -Wl,-Bstatic -lfoo)
  - Make directory ordering specific to a runtime path computation feature
    (look for conflicting SONAMEs instead of library names)
  - Implement proper rpath support on HP-UX and AIX.