From 03cebb9a7f94125db823c6adb2795645cb051fe8 Mon Sep 17 00:00:00 2001
From: Bill Hoffman <bill.hoffman@kitware.com>
Date: Sat, 7 Nov 2009 20:45:34 -0500
Subject: create a better error message

---
 Source/cmSystemTools.cxx | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 49a64e7..5fcadda 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -1823,7 +1823,11 @@ bool cmSystemTools::CreateTar(const char* outFileName,
       int wlen = archive_write_data(a, buff, len);
       if(wlen != len)
         { 
-        cmSystemTools::Error("Problem with archive_write_data:",
+        cmOStringStream error;
+        error << "Problem with archive_write_data\n"
+              << "Tried to write  [" << len << "] bytes.\n"
+              << "archive_write_data wrote  [" << wlen << "] bytes.\n";
+        cmSystemTools::Error(error.str().c_str(),
                              archive_error_string(a)
           );
         return false;
-- 
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