gcc-13/changes.html: Mention -fstrict-flex-arrays and its impact

[Qing Zhao <qing.zhao@oracle.com>]

Hi,

This is the patch for mentioning -fstrict-flex-arrays and -Warray-bounds=2 changes in gcc-13/changes.html.

Let me know if you have any comment or suggestions.

Thanks.

Qing.

=======================================
From c022076169b4f1990b91f7daf4cc52c6c5535228 Mon Sep 17 00:00:00 2001
From: Qing Zhao <qing.zhao@oracle.com>
Date: Tue, 20 Dec 2022 16:13:04 +0000
Subject: [PATCH] gcc-13/changes: Mention -fstrict-flex-arrays and its impact.

---
 htdocs/gcc-13/changes.html | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/htdocs/gcc-13/changes.html b/htdocs/gcc-13/changes.html
index 689178f9..47b3d40f 100644
--- a/htdocs/gcc-13/changes.html
+++ b/htdocs/gcc-13/changes.html
@@ -39,6 +39,10 @@ a work-in-progress.</p>
     <li>Legacy debug info compression option <code>-gz=zlib-gnu</code> was removed
       and the option is ignored right now.</li>
     <li>New debug info compression option value <code>-gz=zstd</code> has been added.</li>
+    <li><code>-Warray-bounds=2</code> will no longer issue warnings for out of bounds
+      accesses to trailing struct members of one-element array type anymore. Please
+      add <code>-fstrict-flex-arrays=level</code> to control how the compiler treat
+      trailing arrays of structures as flexible array members. </li>
 </ul>
 
 
@@ -409,6 +413,17 @@ a work-in-progress.</p>
 <h2>Other significant improvements</h2>
 
 <!-- <h3 id="uninitialized">Eliminating uninitialized variables</h3> -->
+<h3 id="flexible array">Treating trailing arrays as flexible array members</h3>
+
+<ul>
+ <li>GCC can now control when to treat the trailing array of a structure as a 
+     flexible array member for the purpose of accessing the elements of such
+     an array. By default, all trailing arrays of structures are treated as 
+     flexible array members. Use the new command-line option
+     <code>-fstrict-flex-array=level</code> to control how GCC treats the trailing
+     array of a structure as a flexible array member at different levels.
+ </li>
+</ul>
 
 <!-- .................................................................. -->
 <!-- <h2 id="13.1">GCC 13.1</h2> -->
-- 
2.31.1