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NAME

     lib - manipulate @INC at compile time



SYNOPSIS
         use lib LIST;

         no lib LIST;




DESCRIPTION
     This is a small simple module which simplifies the
     manipulation of @INC at compile time.

     It is typically used to add extra directories to perl's
     search path so that later `use' or `require' statements will
     find modules which are not located on perl's default search
     path.

     Adding directories to @INC

     The parameters to `use lib' are added to the start of the
     perl search path. Saying

         use lib LIST;

     is almost the same as saying

         BEGIN { unshift(@INC, LIST) }

     For each directory in LIST (called $dir here) the lib module
     also checks to see if a directory called $dir/$archname/auto
     exists.  If so the $dir/$archname directory is assumed to be
     a corresponding architecture specific directory and is added
     to @INC in front of $dir.

     To avoid memory leaks, all trailing duplicate entries in
     @INC are removed.

     Deleting directories from @INC

     You should normally only add directories to @INC.  If you
     need to delete directories from @INC take care to only
     delete those which you added yourself or which you are
     certain are not needed by other modules in your script.
     Other modules may have added directories which they need for
     correct operation.

     The `no lib' statement deletes all instances of each named
     directory from @INC.

     For each directory in LIST (called $dir here) the lib module
     also checks to see if a directory called $dir/$archname/auto
     exists.  If so the $dir/$archname directory is assumed to be
     a corresponding architecture specific directory and is also
     deleted from @INC.

     Restoring original @INC

     When the lib module is first loaded it records the current
     value of @INC in an array `@lib::ORIG_INC'. To restore @INC
     to that value you can say

         @INC = @lib::ORIG_INC;




SEE ALSO
     FindBin - optional module which deals with paths relative to
     the source file.



AUTHOR
     Tim Bunce, 2nd June 1995.









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