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<p>
      Spirit is a header file only library. There are no libraries to link to. To
      use Spirit X3 simply include:
    </p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">spirit</span><span class="special">/</span><span class="identifier">home</span><span class="special">/</span><span class="identifier">x3</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<p>
      To distinguish between Spirit versions, you can inspect the version file:
    </p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">spirit</span><span class="special">/</span><span class="identifier">home</span><span class="special">/</span><span class="identifier">x3</span><span class="special">/</span><span class="identifier">version</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<p>
      using the preprocessor define
    </p>
<pre class="programlisting"><span class="identifier">SPIRIT_X3_VERSION</span>
</pre>
<p>
      It is a hex number where the first two digits determine the major version while
      the last two digits determine the minor version. For example:
    </p>
<pre class="programlisting"><span class="preprocessor">#define</span> <span class="identifier">SPIRIT_X3_VERSION</span> <span class="number">0x3000</span> <span class="comment">// version 3.0</span>
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        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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