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many edits to the main page, add a prominant 'status' section.
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Chris Lattner
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www/index.html
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<body>
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<!--#include virtual="menu.html.incl"-->
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<div id="content">
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<h1>clang: a C language family frontend for LLVM</h1>
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<h2>About</h2>
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<p>The goal of the Clang project is to create a new <a
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href="http://llvm.org/svn/llvm-project/cfe/trunk/LICENSE.TXT">BSD
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licensed</a> C, C++, & ObjC front-end for the <a
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href="http://www.llvm.org/">LLVM</a> compiler.</p>
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<p>In the context of this website, the term Clang actually refers to two
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things:</p>
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<ol>
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<li> A "code name" for the LLVM compiler front-end.</li>
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<li> A specific library in the LLVM front-end -- in particular the
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"driver" that makes all the other libraries work together.</li>
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</ol>
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<p>The developers of Clang include contributers from Apple and numerous
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other volunteers.</p>
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<p>The goal of the Clang project is to create a new C, C++, Objective C and
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Objective C++ front-end for the <a href="http://www.llvm.org/">LLVM</a>
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compiler.</p>
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<h2>Why?</h2>
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<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 motivations for starting work on a new C/C++/ObjC front-end that could meet these needs.
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<p>An excellent introduction to Clang can be found in the following video lectures:
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<p>The development of a new front-end was started out of a need -- a need
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for a compiler that allows better diagnostics, better integration with
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IDEs, a license that is compatible with commercial products, and a
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compiler that is easier to develop and maintain. All of these were
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motivations for starting work on a new front-end that could
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meet these needs.</p>
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<p>An good (but quite dated) introduction to Clang can be found in the
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following video lectures:</p>
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<ul>
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<li><a href="clang_video-05-25-2007.html">Clang Introduction</a>
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<li><a href="clang_video-07-25-2007.html">Features and Performance of Clang</a>
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(May 2007)</li>
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<li><a href="clang_video-07-25-2007.html">Features and Performance of
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Clang</a> (July 2007)</li>
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</ul>
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<h2>Features/Goals</h2>
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Some of the goals for the project include the following:
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<p>Some of the goals for the project include the following:</p>
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<ul>
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<li>Real-world, production quality compiler.</li>
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<li>A single unified parser for C/ObjC/C++</li>
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<li>Language conformance with C, ObjC, C++ (including variants, like C90, C99, etc)</li>
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<li>GCC compatibility (supports GCC extensions, but allow them to be disabled)</li>
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<li>Library based architecture with finely crafted C++ APIs</li>
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<li>High performance</li>
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<li>Design for integration with IDEs as well as code generation with <a href="http://llvm.org">LLVM</a>.</li>
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<li><a href="features.html#expressivediags">Expressive diagnostics</a></li>
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<li>BSD License</li>
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<li>Real-world, production quality compiler.</li>
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<li>A single unified parser for C, Objective C, C++, and Objective
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C++.</li>
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<li>Language conformance with these languages and their variants, like
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C90, C99, etc.</li>
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<li>GCC compatibility: support GCC extensions, but allow them to be
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disabled.</li>
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<li>Library based architecture with finely crafted APIs.</li>
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<li>Support many clients, such as refactoring, static analysis, as well as
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code generation.</li>
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<li>High performance.</li>
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<li>Design for integration with IDEs as well as code generation with the
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<a href="http://llvm.org">LLVM Optimizer and Code Generator</a>.</li>
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<li><a href="features.html#expressivediags">Expressive diagnostics</a>:
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warnings and errors that are actually helpful and make sense.</li>
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<li>Use the LLVM <a
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href="http://llvm.org/svn/llvm-project/cfe/trunk/LICENSE.TXT">'BSD'
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License</a>.</li>
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</ul>
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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.
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<h2>Try Clang</h2>
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If you are a compiler developer and want to try out Clang, then build instructions are available on the <a href="get_involved.html#build">Get Involved</a> page. Note that clang is still early in development. If you are looking for source analysis or source-to-source transformation tools, clang is probably a great solution for you. If you want to use it as a drop in C compiler, it is not yet ready.
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<p>Of course this is only a rough outline of the goals and features of
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Clang. To get a true sense of what the new LLVM front-end is all about,
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as well as why you might want to considering using it, see the <a
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href="features.html">Features</a> section.</p>
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<h2>Current Status</h2>
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<p>Clang is still in early development stages. If you are looking for
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source analysis or source-to-source transformation tools, clang is probably
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a great solution for you. If you want to use it as a drop in C compiler, it
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is not yet ready.</p>
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<p>Clang currently has pretty good parsing and semantic analysis support for
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C and Objective-C right now, and bugs are usually quickly fixed once
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reported. C++ support is still very early, and we don't expect to have
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respectable C++ support for another 2 years or so.</p>
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<h2>Get Involved</h2>
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If you are interested in working on Clang, then check out the <a href="get_involved.html">Get Involved</a> section.
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<p>The developers of Clang include contributers from Apple and numerous
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other volunteers. If you are interested in joining the community or
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learning more, please consider joining the <a
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href="http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev">cfe-dev</a>
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mailing list, or start by browsing its archives.</p>
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<p>If you are interested in trying out Clang, please see the build
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instructions on the <ahref="get_involved.html#build">Get Involved</a>
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page.</p>
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</div>
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</body>
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</html>
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</html>
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