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83 lines
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83 lines
3.6 KiB
HTML
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<title>Traditional Mode - The C Preprocessor</title>
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<link rel="prev" href="Preprocessor-Output.html#Preprocessor-Output" title="Preprocessor Output">
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any later version published by the Free Software Foundation. A copy of
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<a name="Traditional-Mode"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Implementation-Details.html#Implementation-Details">Implementation Details</a>,
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Previous: <a rel="previous" accesskey="p" href="Preprocessor-Output.html#Preprocessor-Output">Preprocessor Output</a>,
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Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
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</div>
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<h2 class="chapter">10 Traditional Mode</h2>
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<p>Traditional (pre-standard) C preprocessing is rather different from
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the preprocessing specified by the standard. When GCC is given the
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<samp><span class="option">-traditional-cpp</span></samp> option, it attempts to emulate a traditional
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preprocessor.
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<p>GCC versions 3.2 and later only support traditional mode semantics in
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the preprocessor, and not in the compiler front ends. This chapter
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outlines the traditional preprocessor semantics we implemented.
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<p>The implementation does not correspond precisely to the behavior of
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earlier versions of GCC, nor to any true traditional preprocessor.
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After all, inconsistencies among traditional implementations were a
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major motivation for C standardization. However, we intend that it
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should be compatible with true traditional preprocessors in all ways
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that actually matter.
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<ul class="menu">
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<li><a accesskey="1" href="Traditional-lexical-analysis.html#Traditional-lexical-analysis">Traditional lexical analysis</a>
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<li><a accesskey="2" href="Traditional-macros.html#Traditional-macros">Traditional macros</a>
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<li><a accesskey="3" href="Traditional-miscellany.html#Traditional-miscellany">Traditional miscellany</a>
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<li><a accesskey="4" href="Traditional-warnings.html#Traditional-warnings">Traditional warnings</a>
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</ul>
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</body></html>
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