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+          "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+<title>Clang 3.1 Release Notes</title>
+<link type="text/css" rel="stylesheet" href="../menu.css">
+<link type="text/css" rel="stylesheet" href="../content.css">
+<style type="text/css">
+td {
+	vertical-align: top;
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+</head>
+<body>
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+<!--#include virtual="../menu.html.incl"-->
+
+<div id="content">
+
+<h1>Clang 3.1 Release Notes</h1>
+
+<img style="float:right" src="http://llvm.org/img/DragonSmall.png"
+     width="136" height="136" alt="LLVM Dragon Logo">
+
+<ul>
+  <li><a href="#intro">Introduction</a></li>
+  <li><a href="#whatsnew">What's New in Clang 3.1?</a>
+    <ul>
+      <li><a href="#majorfeatures">Major New Features</a></li>
+      <li><a href="#cchanges">C Language Changes</a></li>
+      <li><a href="#cxxchanges">C++ Language Changes</a></li>
+      <li><a href="#objcchanges">Objective-C Language Changes</a></li>
+      <li><a href="#apichanges">Internal API Changes</a></li>
+    </ul>
+  </li>
+  <li><a href="#knownproblems">Known Problems</a></li>
+  <li><a href="#additionalinfo">Additional Information</a></li>
+</ul>
+
+<div class="doc_author">
+  <p>Written by the <a href="http://llvm.org/">LLVM Team</a></p>
+</div>
+
+<h1 style="color:red">These are in-progress notes for the upcoming Clang 3.1
+release.<br>
+You may prefer the
+<a href="http://llvm.org/releases/3.0/docs/ClangReleaseNotes.html">Clang 3.0
+Release Notes</a>.</h1>
+
+<!-- ======================================================================= -->
+<h2 id="intro">Introduction</h2>
+<!-- ======================================================================= -->
+
+<p>This document contains the release notes for the Clang C/C++/Objective-C
+frontend, part of the LLVM Compiler Infrastructure, release 3.1.  Here we
+describe the status of Clang in some detail, including major improvements from
+the previous release and new feature work. For the general LLVM release notes,
+see <a href="http://llvm.org/docs/ReleaseNotes.html">the LLVM
+ documentation</a>. All LLVM releases may be downloaded from the
+<a href="http://llvm.org/releases/">LLVM releases web site</a>.</p>
+
+<p>For more information about Clang or LLVM, including information about the
+latest release, please check out the main please see the
+<a href="http://clang.llvm.org">Clang Web Site</a> or the
+<a href="http://llvm.org">LLVM Web Site</a>.
+
+<p>Note that if you are reading this file from a Subversion checkout or the main
+Clang web page, this document applies to the <i>next</i> release, not the
+current one.  To see the release notes for a specific release, please see the
+<a href="http://llvm.org/releases/">releases page</a>.</p>
+
+<!-- ======================================================================= -->
+<h2 id="whatsnew">What's New in Clang 3.1?</h2>
+<!-- ======================================================================= -->
+
+<p>Some of the major new features and improvements to Clang are listed here.
+Generic improvements to Clang as a whole or two its underlying infrastructure
+are described first, followed by language-specific sections with improvements to
+Clang's support for those languages.</p>
+
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+<h3 id="majorfeatures">Major New Features</h3>
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+
+<h4 id="majorfeature1">Feature 1</h4>
+...
+
+<h4 id="diagnostics">New and better diagnostics</h4>
+
+<p>New: <code>-Wdangling-else</code>, <code>-Wstrncat-size</code>, ...</p>
+
+<p>Improved: <code>-Wformat</code>, <code>-Wempty-body</code>,
+<code>-Wliteral-conversion</code>, ...</p>
+
+<h4 id="tooling">Tooling</h4>
+<!-- FIXME: add a link to the tooling documentation once that's written. -->
+<p>Added an API to enable clang-based standalone tools, including initial build
+system integration.</p>
+
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+<h3 id="cchanges">C Language Changes in Clang</h3>
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+
+<h4 id="c11changes">C11 Feature Support</h4>
+
+<p>Clang 3.1 adds support for anonymous structs and anonymous unions, added in
+the latest ISO C standard. Use <code>-std=c11</code> or <code>-std=gnu11</code>
+to enable support for the new language standard. The new C11 features are
+backwards-compatible and are available as an extension in all language
+modes.</p>
+
+<p>All warning and language selection flags which previously accepted
+<code>c1x</code> have been updated to accept <code>c11</code>. The old
+<code>c1x</code> forms have been removed.
+
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+<h3 id="cxxchanges">C++ Language Changes in Clang</h3>
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+
+<h4 id="cxx11changes">C++11 Feature Support</h4>
+<p>Clang 3.1 adds support for
+<a href="http://clang.llvm.org/cxx_status.html#cxx11">more of the language
+features</a> added in the latest ISO C++ standard,
+<a href="http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=50372">C++ 2011</a>.
+Use <code>-std=c++11</code> or <code>-std=gnu++11</code> to enable support for
+these features. In addition to the features supported by Clang 3.0, the
+following are now considered to be of production quality:
+<ul>
+  <li>Generalized constant expressions</li>
+  <li>Lambda expressions</li>
+  <li>Generalized initializers</li>
+  <li>Unrestricted unions</li>
+  <li>User-defined literals</li>
+  <li>Forward-declared enumerations</li>
+  <li>Atomics (both libc++'s and libstdc++4.7's <tt>&lt;atomic&gt;</tt> are
+      supported)</li>
+</ul>
+
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+<h3 id="objcchanges">Objective-C Language Changes in Clang</h3>
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+Clang 3.1 introduces several new Objective-C language features and improvements.
+
+<h4 id="objcwformat">Format string checking for NSString literals</h4>
+
+<code>-Wformat</code> now checks <code>@"nsstring literals"</code>.
+
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+<h3 id="apichanges">Internal API Changes</h3>
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+
+These are major API changes that have happened since the 3.0 release of Clang.
+If upgrading an external codebase that uses Clang as a library, this section
+should help get you past the largest hurdles of upgrading.
+
+<h4 id="api1">API change 1</h4>
+...
+
+<!-- ======================================================================= -->
+<h2 id="knownproblems">Significant Known Problems</h2>
+<!-- ======================================================================= -->
+
+<!-- ======================================================================= -->
+<h2 id="additionalinfo">Additional Information</h2>
+<!-- ======================================================================= -->
+
+<p>A wide variety of additional information is available on the
+<a href="http://clang.llvm.org/">Clang web page</a>.  The web page contains
+versions of the API documentation which are up-to-date with the Subversion
+version of the source code.  You can access versions of these documents specific
+to this release by going into the "<tt>clang/doc/</tt>" directory in the Clang
+tree.</p>
+
+<p>If you have any questions or comments about Clang, please feel free to
+contact us via the <a href="http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev">
+mailing list</a>.</p>
+
+
+<!-- ======================================================================= -->
+<!-- Likely 3.1 release notes -->
+<!-- ======================================================================= -->
+<!--
+This is just a section to hold things that have already gotten started and
+should likely pick up proper release notes in 3.1.
+
+- C1X and C++11 atomics infrastructure and support
+- CUDA support?
+
+-->
+
+</div>
+</body>
+</html>