link farm

link farm n.  [UNIX] A directory tree that contains many
   links to files in a master directory tree of files.  Link farms
   save space when one is maintaining several nearly identical copies
   of the same source tree -- for example, when the only difference
   is architecture-dependent object files.  "Let's freeze the source
   and then rebuild the FROBOZZ-3 and FROBOZZ-4 link farms."  Link
   farms may also be used to get around restrictions on the number of
   `-I' (include-file directory) arguments on older C
   preprocessors.  However, they can also get completely out of hand,
   becoming the filesystem equivalent of {spaghetti code}.