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<h2 class="chapter">8 Option specification files</h2>
<p><a name="index-option-specification-files-1666"></a><a name="index-g_t_0040samp_007boptc_002dgen_002eawk_007d-1667"></a>
Most GCC command-line options are described by special option
definition files, the names of which conventionally end in
<code>.opt</code>. This chapter describes the format of these files.
<ul class="menu">
<li><a accesskey="1" href="Option-file-format.html#Option-file-format">Option file format</a>: The general layout of the files
<li><a accesskey="2" href="Option-properties.html#Option-properties">Option properties</a>: Supported option properties
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