lndir  -  create  a  shadow  directory  of  symbolic  links  to another
   directory tree


   lndir [ -silent ] [ -ignorelinks ] [ -withrevinfo ] fromdir [ todir ]


   The lndir program makes  a  shadow  copy  todir  of  a  directory  tree
   fromdir,  except  that  the shadow is not populated with real files but
   instead with symbolic links pointing at the real files in  the  fromdir
   directory tree.  This is usually useful for maintaining source code for
   different  machine  architectures.   You  create  a  shadow   directory
   containing  links  to  the  real  source,  which  you will have usually
   mounted from a remote machine.  You can build in the shadow  tree,  and
   the  object  files  will  be  in the shadow directory, while the source
   files in the shadow directory are just symlinks to the real files.

   This scheme has the advantage that if you update the source,  you  need
   not  propagate the change to the other architectures by hand, since all
   source in all shadow directories are symlinks to the real  thing:  just
   cd to the shadow directory and recompile away.

   The  todir  argument is optional and defaults to the current directory.
   The fromdir argument may be relative (e.g., ../src) and is relative  to
   todir (not the current directory).

   Note  that  BitKeeper,  CVS,  CVS.adm,  .git,  .hg, RCS, SCCS, and .svn
   directories are shadowed only if the -withrevinfo  flag  is  specified.
   Files with names ending in ~ are never shadowed.

   If  you  add files, simply run lndir again.  New files will be silently
   added.  Old files will be checked that they have the correct link.

   Deleting files is a more painful problem; the symlinks will just  point
   into never never land.

   If  a file in fromdir is a symbolic link, lndir will make the same link
   in todir rather than making a link back to the (symbolic link) entry in
   fromdir.  The -ignorelinks flag changes this behavior.


          Normally  lndir  outputs  the  name  of  each subdirectory as it
          descends into it.  The -silent option  suppresses  these  status

          Causes  the  program  to  not  treat  symbolic  links in fromdir
          specially.  The link created in todir will  point  back  to  the
          corresponding  (symbolic  link) file in fromdir.  If the link is
          to a directory, this is almost certainly the wrong thing.

          This option exists mostly to emulate the behavior the C  version
          of lndir had in X11R6.  Its use is not recommended.

          Causes  any  source  control manager subdirectories (those named
          BitKeeper, CVS, CVS.adm, .git, .hg, RCS, SCCS, or  .svn)  to  be
          treated as any other directory, rather than ignored.


   The  program displays the name of each subdirectory it enters, followed
   by a colon.  The -silent option suppresses these messages.

   A warning message is displayed if the symbolic link cannot be  created.
   The  usual  problem  is  that  a  regular file of the same name already

   If the link already exists but doesn't point to the correct  file,  the
   program prints the link name and the location where it does point.




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