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  <h1>Clang: a C language family frontend for LLVM</h1>
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  <p>The Clang project provides a language front-end and tooling infrastructure
  for languages in the C language family (C, C++, Objective C/C++, OpenCL,
  CUDA, and RenderScript) for the <a href="https://www.llvm.org/">LLVM</a>
  project. Both a GCC-compatible compiler driver (<tt>clang</tt>) and an
  MSVC-compatible compiler driver (<tt>clang-cl.exe</tt>) are provided. You
  can <a href="get_started.html">get and build</a> the source today.</p>

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  <h2 id="goals">Features and Goals</h2>
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  <p>Some of the goals for the project include the following:</p>

  <p><b><a href="features.html#enduser">End-User Features</a></b>:</p>

  <ul>
  <li>Fast compiles and low memory use</li>
  <li>Expressive diagnostics (<a href="diagnostics.html">examples</a>)</li>
  <li>GCC & MSVC compatibility</li>
  </ul>

  <p><b><a href="features.html#applications">Utility and
     Applications</a></b>:</p>

  <ul>
  <li>Modular library based architecture</li>
  <li>Support diverse clients (refactoring, static analysis, code generation,
   etc.)</li>
  <li>Allow tight integration with IDEs</li>
  <li>Use the LLVM 'Apache 2'
    <a href="https://github.com/llvm/llvm-project/blob/main/LICENSE.TXT">License</a>
  </li>
  </ul>

  <p><b><a href="features.html#design">Internal Design and
     Implementation</a></b>:</p>

  <ul>
  <li>A real-world, production quality compiler</li>
  <li>A simple and hackable code base</li>
  <li>A single unified parser for C, Objective C, C++, and Objective C++</li>
  <li>Conformance with C/C++/ObjC and their variants</li>
  </ul>

  <p>Of course this is only a rough outline of the goals and features of
     Clang.  To get a true sense of what it is all about, see the <a
     href="features.html">Features</a> section, which breaks
     each of these down and explains them in more detail.</p>


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  <h2>Why?</h2>
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  <p>Development of the new front-end was started out of a need
     for a compiler that allows better diagnostics, better integration with
     IDEs, a license that is compatible with commercial products, and a
     nimble compiler that is easy to develop and maintain.  All of these were
     motivations for starting work on a new front-end that could
     meet these needs.</p>

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  <h2>Current Status</h2>
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  <p>Clang is considered to
   be a production quality C, Objective-C, C++ and Objective-C++ compiler when
   targeting any target supported by LLVM. As example, Clang is used in
   production to build performance-critical software like Chrome or Firefox.
   <br />  If you are looking for source analysis or source-to-source
   transformation tools, Clang is probably a great solution for you. Please see
   the <a href="cxx_status.html">C++ status</a> page or the
   <a href="c_status.html">C status</a> page for more information about what
   standard modes and features are supported.</p>

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  <h2>Get it and get involved!</h2>
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  <p>Start by <a href="get_started.html">getting the code, building it, and
     playing with it</a>.  This will show you the sorts of things we can do
     today and will let you have the "Clang experience" first hand: hopefully
     it will "resonate" with you. :)</p>

  <p>Once you've done that, please consider <a href="get_involved.html">getting
     involved in the Clang community</a>.  The Clang developers include numerous
     volunteer contributors with a variety of backgrounds.  If you're
     interested in
     following the development of Clang, signing up for a mailing list is a good
     way to learn about how the project works.</p>
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author	Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date	Thu, 12 Oct 2023 15:52:37 +0900
parents	1f2b6ac9f198
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