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<span id="Traditional-Mode-1"></span><h2 class="chapter">10 Traditional Mode</h2>

<p>Traditional (pre-standard) C preprocessing is rather different from
the preprocessing specified by the standard.  When the preprocessor 
is invoked with the 
<samp>-traditional-cpp</samp> option, it attempts to emulate a traditional
preprocessor.  
</p>
<p>This mode is not useful for compiling C code with GCC, 
but is intended for use with non-C preprocessing applications.  Thus
traditional mode semantics are supported only when invoking
the preprocessor explicitly, and not in the compiler front ends.
</p>
<p>The implementation does not correspond precisely to the behavior of
early pre-standard versions of GCC, nor to any true traditional preprocessor.
After all, inconsistencies among traditional implementations were a
major motivation for C standardization.  However, we intend that it
should be compatible with true traditional preprocessors in all ways
that actually matter.
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