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<title>Minimal clang home page</title>
<p>
This is a bare bones web page for the "clang" C front-end. This project will
provide a new C/C++/ObjC front-end for <a href="http://llvm.org">LLVM</a>.
</p>
<p>The motivation for this project is described well in Steve Naroff's talk
at the <a href="http://llvm.org/devmtg/2007-05/">2007 LLVM Developer Meeting</a>.
A <a href="http://llvm.org/devmtg/2007-05/09-Naroff-CFE.mov">video</a> and
<a href="http://llvm.org/devmtg/2007-05/09-Naroff-CFE.pdf">slides</a> are
available.</p>
<p>Some more motivation, details, and performance numbers are in the second
half of Chris' <a
href="http://llvm.org/pubs/2007-07-25-LLVM-2.0-and-Beyond.html"> LLVM 2.0
and Beyond!</a> talk, which describes how the clang pre-processor can be used
to make distcc 3-4x more scalable.</p>
<p>To get and build the source, please follow <a
href="http://lists.cs.uiuc.edu/pipermail/llvmdev/2007-July/009817.html">these
directions</a>.</p>
<p>If you are interested in discussing this work, please join the <a
href="http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev">cfe-dev</a> mailing
list. If you are interested in contributing to it or following its progress,
please join the <a href="http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits">
cfe-commits</a> list.</p>
<p>A rough <a href="docs/InternalsManual.html">Internals Manual</a> is
available.</p>
<p>Please note that we don't consider this to be ready for people to take and
compile random pieces of code with yet. However, if you'd like to do so
<em>and</em> help fix problems exposed by doing so, we would appreciate the help.</p>
<!--
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HTML 4.01 specs: http://www.w3.org/TR/html401/
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<html>
<head>
<title>Clang c-lang parser for LLVM</title>
<link type="text/css" rel="stylesheet" href="menu.css" />
<link type="text/css" rel="stylesheet" href="content.css" />
</head>
<body>
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<div id="content">
<h1>Clang: a C language front-end for LLVM</h1>
<h2>About</h2>
<p>The goal of the Clang project is to create a new <a href="http://llvm.org/svn/llvm-project/cfe/trunk/LICENSE.TXT">BSD Licensed</a> C, C++, & ObjC front-end for the <a href="http://www.llvm.org/">LLVM</a> compiler.
<br><br>
<p>In the context of this website, the term Clang actually refers to two things:
<p>1) A "code name" for the LLVM compiler front-end.
<p>2) A specific library in the LLVM front-end -- in particular the "driver" that makes all the other libraries work together.
<br><br>
<p>The developers of Clang include contributers from Apple and numerous other volunteers.
<h2>Why?</h2>
<p>The development of a new front-end was started out of a need -- a need for a compiler that allows better diagnostics, better integration with IDEs, a license that is compatible with commercial products, and a compiler that is easier to develop and maintain. All of these were motiviations for starting work on a new C/C++/ObjC front-end that could meet these needs.
<p>An excellent introduction to Clang can be found in the following video lectures:
<ul>
<li><a href="clang_video-05-25-2007.html">Clang Introduction</a>
<li><a href="clang_video-07-25-2007.html">Features and Performance of Clang</a>
</ul>
<h2>Features/Goals</h2>
Some of the goals for the project include the following:
<ul>
<li>Unified parser for C-based languages
<li>Language conformance with C99, ObjC, C++
<li>Real-world, production quality compiler
<li>GCC compatibility
<li>Library based architecture with finely crafted C++ API’s
<li>High performance
<li>Better integration with IDEs
<li>Expressive diagnostics
<li>BSD License
</ul>
Of course this is only a rough outline of the goals and features of Clang. To get a true sense of what the new LLVM front-end is all about, as well as why you might want to considering using it, see the <a href="features.html">Features</a> section.
<h2>Get Involved</h2>
If you are interested in working on Clang, then check out the <a href="get_involved.html">Get Involved</a> section.
</div>
</body>
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