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<h3 class="section">4.2 Environment</h3>

<p>The behavior of most of these points are dependent on the implementation
of the C library, and are not defined by GCC itself.

     <ul>
<li><cite>The mapping between physical source file multibyte characters
and the source character set in translation phase 1 (C90 and C99 5.1.1.2).</cite>

     <p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.

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