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.