Deprecate look.pl with a warning

diff --git a/lib/look.pl b/lib/look.pl
index ccc9b61..fec31fe 100644 (file)
--- a/lib/look.pl
+++ b/lib/look.pl
@@ -2,10 +2,15 @@
 #
 # This library is no longer being maintained, and is included for backward
 # compatibility with Perl 4 programs which may require it.
+# This legacy library is deprecated and will be removed in a future
+# release of perl.
 #
 # In particular, this should not be used as an example of modern Perl
 # programming techniques.
-#
+
+warn( "The 'look.pl' legacy library is deprecated and will be"
+      . " removed in the next major release of perl." );
+
 ;# Sets file position in FILEHANDLE to be first line greater than or equal
 ;# (stringwise) to $key.  Pass flags for dictionary order and case folding.