From a54cea44ae94179b71eed1e990a761c0060f85e5 Mon Sep 17 00:00:00 2001
From: Davis King <davis@dlib.net>
Date: Thu, 16 Dec 2021 08:16:59 -0500
Subject: [PATCH] added a comment

---
 dlib/matrix/matrix_la.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlib/matrix/matrix_la.h b/dlib/matrix/matrix_la.h
index 53c4d674b..cc8be42b4 100644
--- a/dlib/matrix/matrix_la.h
+++ b/dlib/matrix/matrix_la.h
@@ -160,6 +160,8 @@ namespace dlib
 
         /* Householder's reduction to bidiagonal form. */
         g = x = 0.0;    
+        // We use *ei instead of e(i) because some versions of gcc emit a bogus warning message
+        // otherwise.
         auto ei = e.begin();
         for (i=0; i<n; i++, ei++)
         {