From 6c7074b5f641f73e92b6b906f632cc5f97357408 Mon Sep 17 00:00:00 2001
From: Simon Ruderich <simon@ruderich.org>
Date: Mon, 27 Sep 2010 23:30:01 +0200
Subject: vim_mode: Print a warning for UTF-8 mode if Perl < 5.8.1.

---
 vim-mode/vim_mode.pl | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/vim-mode/vim_mode.pl b/vim-mode/vim_mode.pl
index 944db53..dbe953c 100644
--- a/vim-mode/vim_mode.pl
+++ b/vim-mode/vim_mode.pl
@@ -1075,6 +1075,11 @@ sub setup_changed {
         $non_word = qr/[^\w_\s]/o;
     }
 
+    if ($new_utf8 and (!$^V or $^V lt v5.8.1)) {
+        _warn("Warning: UTF-8 isn't supported very well in perl < 5.8.1! " .
+              "Please disable vim_mode_utf8.");
+    }
+
     $utf8 = $new_utf8;
 }
 
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