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Node:<a name="Obsolete%20Features">Obsolete Features</a>,
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<h3 class="section">Obsolete Features</h3>
<p>CPP has a number of features which are present mainly for
compatibility with older programs. We discourage their use in new code.
In some cases, we plan to remove the feature in a future version of GCC.
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<li><a accesskey="1" href="Assertions.html#Assertions">Assertions</a>:
<li><a accesskey="2" href="Obsolete-once-only-headers.html#Obsolete%20once-only%20headers">Obsolete once-only headers</a>:
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