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<a name="M32C-Options-1"></a>
<h4 class="subsection">3.19.23 M32C Options</h4>
<a name="index-M32C-options"></a>

<dl compact="compact">
<dt><code>-mcpu=<var>name</var></code></dt>
<dd><a name="index-mcpu_003d-2"></a>
<p>Select the CPU for which code is generated.  <var>name</var> may be one of
&lsquo;<samp>r8c</samp>&rsquo; for the R8C/Tiny series, &lsquo;<samp>m16c</samp>&rsquo; for the M16C (up to
/60) series, &lsquo;<samp>m32cm</samp>&rsquo; for the M16C/80 series, or &lsquo;<samp>m32c</samp>&rsquo; for
the M32C/80 series.
</p>
</dd>
<dt><code>-msim</code></dt>
<dd><a name="index-msim-4"></a>
<p>Specifies that the program will be run on the simulator.  This causes
an alternate runtime library to be linked in which supports, for
example, file I/O.  You must not use this option when generating
programs that will run on real hardware; you must provide your own
runtime library for whatever I/O functions are needed.
</p>
</dd>
<dt><code>-memregs=<var>number</var></code></dt>
<dd><a name="index-memregs_003d"></a>
<p>Specifies the number of memory-based pseudo-registers GCC uses
during code generation.  These pseudo-registers are used like real
registers, so there is a tradeoff between GCC&rsquo;s ability to fit the
code into available registers, and the performance penalty of using
memory instead of registers.  Note that all modules in a program must
be compiled with the same value for this option.  Because of that, you
must not use this option with GCC&rsquo;s default runtime libraries.
</p>
</dd>
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