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<h3 class="section">23.1 Loading Plugins</h3>
<p>Plugins are supported on platforms that support <samp><span class="option">-ldl
-rdynamic</span></samp>. They are loaded by the compiler using <code>dlopen</code>
and invoked at pre-determined locations in the compilation
process.
<p>Plugins are loaded with
<p><samp><span class="option">-fplugin=/path/to/</span><var>name</var><span class="option">.so</span></samp> <samp><span class="option">-fplugin-arg-</span><var>name</var><span class="option">-</span><var>key1</var><span class="option">[=</span><var>value1</var><span class="option">]</span></samp>
<p>The plugin arguments are parsed by GCC and passed to respective
plugins as key-value pairs. Multiple plugins can be invoked by
specifying multiple <samp><span class="option">-fplugin</span></samp> arguments.
<p>A plugin can be simply given by its short name (no dots or
slashes). When simply passing <samp><span class="option">-fplugin=</span><var>name</var></samp>, the plugin is
loaded from the <samp><span class="file">plugin</span></samp> directory, so <samp><span class="option">-fplugin=</span><var>name</var></samp> is
the same as <samp><span class="option">-fplugin=`gcc -print-file-name=plugin`/</span><var>name</var><span class="option">.so</span></samp>,
using backquote shell syntax to query the <samp><span class="file">plugin</span></samp> directory.
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