Deprecate flush.pl with a warning

diff --git a/lib/flush.pl b/lib/flush.pl
index 8aa6d55..577f7c7 100644 (file)
--- a/lib/flush.pl
+++ b/lib/flush.pl
@@ -1,12 +1,18 @@
 #
 # 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.
 #
 # Suggested alternative: IO::Handle
-#
+
+warn( "The 'flush.pl' legacy library is deprecated and will be"
+      . " removed in the next major release of perl. Please use the"
+      . " IO::Handle module instead." );
+
 ;# Usage: &flush(FILEHANDLE)
 ;# flushes the named filehandle