I've committed the following to reflect the recent addition.
Index: changes.html
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RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-8/changes.html,v
retrieving revision 1.5
diff -u -r1.5 changes.html
--- changes.html 20 Jun 2017 10:19:11 -0000 1.5
+++ changes.html 26 Jun 2017 14:53:28 -0000
@@ -50,6 +50,14 @@
<h3 id="c-family">C family</h3>
<ul>
+ <li>New command-line options have been added for the C and C++ compilers:
+ <ul>
+ <li><code>-Wmultistatement-macros</code> warns about unsafe macros
+ expanding to multiple statements used as a body of a clause such
+ as <code>if</code>, <code>else</code>, <code>while</code>,
+ <code>switch</code>, or <code>for</code>.</li>
+ </ul>
+ </li>
<li><code>-fno-strict-overflow</code> is now mapped to
<code>-fwrapv</code> and signed integer overflow is now undefined by
default at all optimization levels. Using
Marek
