sdk/2.1/docs/man/xhtml/attribute.html

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    <title>__attribute__</title>
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        <a xmlns="http://www.w3.org/1999/xhtml" id="attribute"></a>
        <h1>__attribute__</h1>
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      <div class="refsect2">
        <a id="synopsis"></a>
        <h3>
        </h3>
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                <td align="left">
__attribute__ ((<em class="replaceable"><code>attribute-list</code></em>))

attribute-list:
     attribute<sub>opt</sub>
     attribute-list, attribute<sub>opt</sub>

attribute:
     attribute-token attribute-argument-clause<sub>opt</sub>

attribute-token:
     identifier

attribute-argument-clause:
     ( attribute-argument-list )

attribute-argument-list:
     attribute-argument
     attribute-argument-list, attribute-argument

attribute-argument:
     assignment-expression
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      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
          This section describes the syntax with which <code class="code">__attribute__</code> may be used,
          and the constructs to which attribute specifiers bind.
        </p>
        <p>
          An attribute specifier is of the form <code class="constant">__attribute__
          ((<em class="replaceable"><code>attribute-list</code></em>))</code>.
        </p>
        <p>
          This syntax is taken directly from GCC but unlike GCC, which allows attributes to be
          applied only to functions, types, and variables, OpenCL attributes can be associated
          with:
        </p>
        <div class="itemizedlist">
          <ul class="itemizedlist" style="list-style-type: bullet; ">
            <li class="listitem" style="list-style-type: disc">
              <p>
<a class="citerefentry" href="attributes-types.html"><span class="citerefentry"><span class="refentrytitle">types</span></span></a>
               </p>
            </li>
            <li class="listitem" style="list-style-type: disc">
              <p>
<a class="citerefentry" href="functionQualifiers.html"><span class="citerefentry"><span class="refentrytitle">functions</span></span></a>
               </p>
            </li>
            <li class="listitem" style="list-style-type: disc">
              <p>
<a class="citerefentry" href="attributes-variables.html"><span class="citerefentry"><span class="refentrytitle">variables</span></span></a>
               </p>
            </li>
            <li class="listitem" style="list-style-type: disc">
              <p>
<a class="citerefentry" href="attributes-blocksAndControlFlow.html"><span class="citerefentry"><span class="refentrytitle">blocks</span></span></a>
               </p>
            </li>
            <li class="listitem" style="list-style-type: disc">
              <p>
<a class="citerefentry" href="attributes-blocksAndControlFlow.html"><span class="citerefentry"><span class="refentrytitle">control-flow statements</span></span></a>
               </p>
            </li>
          </ul>
        </div>
        <p>
          In general, the rules for how an attribute binds for a given context are non-trivial
          and the reader is pointed to GCC's documentation and Maurer and Wong's paper (See the
          "References" section in the <a href="https://www.khronos.org/registry/cl/specs/opencl-2.1-openclc.pdf#page=1" target="OpenCL Spec">OpenCL specification</a>
          for details.)
        </p>
      </div>
      <div class="refsect1">
        <a id="specification"></a>
        <h2>Specification</h2>
        <p>
            <img src="pdficon_small1.gif" />

            <a href="https://www.khronos.org/registry/cl/specs/opencl-2.1-openclc.pdf#page=56" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
            <a class="citerefentry" href="attributes-types.html"><span class="citerefentry"><span class="refentrytitle">Type Attributes</span></span></a>,
            <a class="citerefentry" href="attributes-variables.html"><span class="citerefentry"><span class="refentrytitle">Variable Attributes</span></span></a>,
            <a class="citerefentry" href="attributes-blocksAndControlFlow.html"><span class="citerefentry"><span class="refentrytitle">Block and Control-Flow Statement Attributes</span></span></a>,
            <a class="citerefentry" href="functionQualifiers.html"><span class="citerefentry"><span class="refentrytitle">Function Qualifiers</span></span></a>
        </p>
      </div>
      <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2015 The Khronos Group Inc.
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