diff --git a/extensions/clext.php b/extensions/clext.php
index 4cc9a38..5dae7d8 100644
--- a/extensions/clext.php
+++ b/extensions/clext.php
@@ -125,4 +125,6 @@
 </li>
 <li value=63><a href="extensions/arm/cl_arm_scheduling_controls.html">cl_arm_scheduling_controls</a>
 </li>
+<li value=64><a href="extensions/ext/cl_ext_cxx_for_opencl.html">cl_ext_cxx_for_opencl</a>
+</li>
 </ol>
diff --git a/extensions/ext/cl_ext_cxx_for_opencl.html b/extensions/ext/cl_ext_cxx_for_opencl.html
new file mode 100644
index 0000000..2de23aa
--- /dev/null
+++ b/extensions/ext/cl_ext_cxx_for_opencl.html
@@ -0,0 +1,1131 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<meta http-equiv="X-UA-Compatible" content="IE=edge">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<meta name="generator" content="Asciidoctor 2.0.10">
+<meta name="author" content="Khronos&#174; OpenCL Working Group">
+<title>cl_ext_cxx_for_opencl</title>
+<style>
+/*! normalize.css v2.1.2 | MIT License | git.io/normalize */
+/* ========================================================================== HTML5 display definitions ========================================================================== */
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+script { display: none !important; }
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+<body class="book">
+<div id="header">
+<h1>cl_ext_cxx_for_opencl</h1>
+<div class="details">
+<span id="author" class="author">Khronos<sup>&#174;</sup> OpenCL Working Group</span><br>
+<span id="revnumber">version v3.0.3-rc-26-g17d39ef,</span>
+<span id="revdate">Wed, 02 Sep 2020 20:35:39 +0000</span>
+<br><span id="revremark">from git branch: cl_ext_cxx_for_opencl commit: 17d39ef018b76889855b4e8b0c0227381e867a95</span>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_name_strings"><a class="anchor" href="#_name_strings"></a>Name Strings</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p><code>cl_ext_cxx_for_opencl</code></p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_contact"><a class="anchor" href="#_contact"></a>Contact</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>Please see the <strong>Issues</strong> list in the Khronos <strong>OpenCL-Docs</strong> repository:<br>
+<a href="https://github.com/KhronosGroup/OpenCL-Docs" class="bare">https://github.com/KhronosGroup/OpenCL-Docs</a></p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_contributors"><a class="anchor" href="#_contributors"></a>Contributors</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>Kevin Petit, Arm Ltd.<br>
+Sven Van Haastregt, Arm Ltd.<br>
+Anastasia Stulova, Arm Ltd.<br>
+Marco Antognini, Arm Ltd.<br>
+Neil Hickey, Arm Ltd.<br>
+Alastair Murray, Codeplay<br></p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_notice"><a class="anchor" href="#_notice"></a>Notice</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>Copyright 2008-2020 The Khronos Group.</p>
+</div>
+<div class="paragraph">
+<p>This specification is protected by copyright laws and contains material proprietary
+to the Khronos Group, Inc. Except as described by these terms, it or any components
+may not be reproduced, republished, distributed, transmitted, displayed, broadcast
+or otherwise exploited in any manner without the express prior written permission
+of Khronos Group.</p>
+</div>
+<div class="paragraph">
+<p>Khronos Group grants a conditional copyright license to use and reproduce the
+unmodified specification for any purpose, without fee or royalty, EXCEPT no licenses
+to any patent, trademark or other intellectual property rights are granted under
+these terms. Parties desiring to implement the specification and make use of
+Khronos trademarks in relation to that implementation, and receive reciprocal patent
+license protection under the Khronos IP Policy must become Adopters and confirm the
+implementation as conformant under the process defined by Khronos for this
+specification; see <a href="https://www.khronos.org/adopters" class="bare">https://www.khronos.org/adopters</a>.</p>
+</div>
+<div class="paragraph">
+<p>Khronos Group makes no, and expressly disclaims any, representations or warranties,
+express or implied, regarding this specification, including, without limitation:
+merchantability, fitness for a particular purpose, non-infringement of any
+intellectual property, correctness, accuracy, completeness, timeliness, and
+reliability. Under no circumstances will the Khronos Group, or any of its Promoters,
+Contributors or Members, or their respective partners, officers, directors,
+employees, agents or representatives be liable for any damages, whether direct,
+indirect, special or consequential damages for lost revenues, lost profits, or
+otherwise, arising from or in connection with these materials.</p>
+</div>
+<div class="paragraph">
+<p>Vulkan and Khronos are registered trademarks, and OpenXR, SPIR, SPIR-V, SYCL, WebGL,
+WebCL, OpenVX, OpenVG, EGL, COLLADA, glTF, NNEF, OpenKODE, OpenKCAM, StreamInput,
+OpenWF, OpenSL ES, OpenMAX, OpenMAX AL, OpenMAX IL, OpenMAX DL, OpenML and DevU are
+trademarks of the Khronos Group Inc. ASTC is a trademark of ARM Holdings PLC,
+OpenCL is a trademark of Apple Inc. and OpenGL and OpenML are registered trademarks
+and the OpenGL ES and OpenGL SC logos are trademarks of Silicon Graphics
+International used under license by Khronos. All other product names, trademarks,
+and/or company names are used solely for identification and belong to their
+respective owners.</p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_version"><a class="anchor" href="#_version"></a>Version</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>Built On: 2020-09-02<br>
+Version: 1.0.0</p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_dependencies"><a class="anchor" href="#_dependencies"></a>Dependencies</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>This extension is written against the OpenCL Specification
+Version 3.0.3.</p>
+</div>
+<div class="paragraph">
+<p>This extension requires OpenCL 3.0 with OpenCL C 2.0 support or OpenCL 2.x and
+<code>cl_khr_extended_versioning</code>.</p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_overview"><a class="anchor" href="#_overview"></a>Overview</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>This extension adds support for building programs written using the C++ for
+OpenCL kernel language. It also enables applications to query the version of
+the language supported by the device compiler.</p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_new_build_option"><a class="anchor" href="#_new_build_option"></a>New build option</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>This extension adds support for a new <code>CLC++</code> value to be passed to the
+<code>-cl-std</code> build option accepted by <strong>clBuildProgram</strong> and <strong>clCompileProgram</strong>.</p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_new_api_enums"><a class="anchor" href="#_new_api_enums"></a>New API Enums</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>Accepted value for the <em>param_name</em> parameter to <strong>clGetDeviceInfo</strong>:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="c">CL_DEVICE_CXX_FOR_OPENCL_NUMERIC_VERSION_EXT       <span class="hex">0x4230</span></code></pre>
+</div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_modifications_to_the_opencl_api_specification"><a class="anchor" href="#_modifications_to_the_opencl_api_specification"></a>Modifications to the OpenCL API Specification</h2>
+<div class="sectionbody">
+<div class="dlist">
+<dl>
+<dt class="hdlist1">(Modify Section 4.2, <strong>Querying Devices</strong>) </dt>
+<dd>
+<div class="openblock">
+<div class="content">
+<div class="dlist">
+<dl>
+<dt class="hdlist1">(Add the following to Table 4.3, <em>Device Queries</em>) </dt>
+</dl>
+</div>
+</div>
+</div>
+</dd>
+</dl>
+</div>
+<table class="tableblock frame-all grid-all stretch">
+<colgroup>
+<col style="width: 16.6666%;">
+<col style="width: 16.6666%;">
+<col style="width: 66.6668%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-top">cl_device_info</th>
+<th class="tableblock halign-left valign-top">Return Type</th>
+<th class="tableblock halign-left valign-top">Description</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-top"><p class="tableblock"><code>CL_DEVICE_CXX_FOR_OPENCL_NUMERIC_VERSION_EXT</code></p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock"><code>cl_version</code></p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">Returns the version of the C++ for OpenCL language supported by the
+  device compiler.</p></td>
+</tr>
+</tbody>
+</table>
+<div class="openblock">
+<div class="content">
+
+</div>
+</div>
+<div class="dlist">
+<dl>
+<dt class="hdlist1">(Modify Section 5.8.1, <strong>Creating Program Objects</strong>) </dt>
+<dd>
+<div class="openblock">
+<div class="content">
+<div class="paragraph">
+<p>Add the following text to the description for <strong>clCreateProgramWithSource</strong>:</p>
+</div>
+<div class="paragraph">
+<p>The source code specified by <em>strings</em> may also be a C++ for OpenCL program source
+or header.</p>
+</div>
+</div>
+</div>
+</dd>
+<dt class="hdlist1">(Modify section to 5.8.6, <strong>Compiler Options</strong>) </dt>
+<dd>
+<div class="openblock">
+<div class="content">
+<div class="dlist">
+<dl>
+<dt class="hdlist1">(Add subsection, <strong>C++ for OpenCL</strong>) </dt>
+</dl>
+</div>
+</div>
+</div>
+<div class="paragraph">
+<p>Applications may pass <code>-cl-std=CLC++</code> to <strong>clCompileProgram</strong> and <strong>clBuildProgram</strong>
+for programs created using <strong>clCreateProgramFromSource</strong> to request the program
+be built as C++ for OpenCL.</p>
+</div>
+</dd>
+</dl>
+</div>
+<div class="openblock">
+<div class="content">
+
+</div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_conformance_tests"><a class="anchor" href="#_conformance_tests"></a>Conformance tests</h2>
+<div class="sectionbody">
+<div class="olist arabic">
+<ol class="arabic">
+<li>
+<p>Test that a program can successfully be compiled with <code>-cl-std=CLC++</code>.</p>
+</li>
+<li>
+<p>Test with a program compiled with <code>-cl-std=CLC++</code> that the value of the
+__OPENCL_CPP_VERSION__ macro agrees with the version returned by
+<code>CL_DEVICE_CXX_FOR_OPENCL_NUMERIC_VERSION_EXT</code>.</p>
+</li>
+</ol>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_issues"><a class="anchor" href="#_issues"></a>Issues</h2>
+<div class="sectionbody">
+<div class="paragraph">
+<p>None.</p>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_version_history"><a class="anchor" href="#_version_history"></a>Version History</h2>
+<div class="sectionbody">
+<table class="tableblock frame-all grid-rows stretch">
+<colgroup>
+<col style="width: 4.7619%;">
+<col style="width: 14.2857%;">
+<col style="width: 14.2857%;">
+<col style="width: 66.6667%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-top">Version</th>
+<th class="tableblock halign-left valign-top">Date</th>
+<th class="tableblock halign-left valign-top">Author</th>
+<th class="tableblock halign-left valign-top">Changes</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-top"><p class="tableblock">1.0.0</p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">2020-08-25</p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">Kevin Petit</p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>Initial revision</strong></p></td>
+</tr>
+</tbody>
+</table>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Version v3.0.3-rc-26-g17d39ef<br>
+Last updated 2020-09-02 20:50:43 +0100
+</div>
+</div>
+<style>
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diff --git a/extensions/registry.py b/extensions/registry.py
index 1d54ffa..1532b53 100644
--- a/extensions/registry.py
+++ b/extensions/registry.py
@@ -96,6 +96,11 @@
         'flags' : { 'public' },
         'url' : 'extensions/ext/cl_ext_atomic_counters_64.txt',
     },
+    'cl_ext_cxx_for_opencl' : {
+        'number' : 64,
+        'flags' : { 'public' },
+        'url' : 'extensions/ext/cl_ext_cxx_for_opencl.html',
+    },
     'cl_ext_device_fission' : {
         'number' : 11,
         'flags' : { 'public' },