</li>
<li><a href="#b2.history">12. History</a>
<ul class="sectlevel2">
-<li><a href="#_version_4_0_0">12.1. Version 4.0.0</a></li>
+<li><a href="#_version_4_0_1">12.1. Version 4.0.1</a></li>
+<li><a href="#_version_4_0_0">12.2. Version 4.0.0</a></li>
</ul>
</li>
</ul>
<h2 id="b2.history"><a class="anchor" href="#b2.history"></a>12. History</h2>
<div class="sectionbody">
<div class="sect2">
-<h3 id="_version_4_0_0"><a class="anchor" href="#_version_4_0_0"></a>12.1. Version 4.0.0</h3>
+<h3 id="_version_4_0_1"><a class="anchor" href="#_version_4_0_1"></a>12.1. Version 4.0.1</h3>
+<div class="paragraph">
+<p>This patch release fixes a minor issue when trying to configure toolsets that
+override the toolset version with a non-version tag. Currently this is only
+known to be a problem if you: (a) configure a toolset version to something
+like “tot” (b) in Boost 1.72.0 when it creates cmake install artifacts.
+Fix for this was provided Peter Dimov.</p>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_version_4_0_0"><a class="anchor" href="#_version_4_0_0"></a>12.2. Version 4.0.0</h3>
<div class="paragraph">
<p>After even more years of development the landscape of build systems has changed
considerably, and so has the landscape of compilers. This version marks the