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<h4 class="subsection">3.17.19 M32C Options</h4>

<p><a name="index-M32C-options-1429"></a>
     <dl>
<dt><code>-mcpu=</code><var>name</var><dd><a name="index-mcpu_003d-1430"></a>Select the CPU for which code is generated.  <var>name</var> may be one of
&lsquo;<samp><span class="samp">r8c</span></samp>&rsquo; for the R8C/Tiny series, &lsquo;<samp><span class="samp">m16c</span></samp>&rsquo; for the M16C (up to
/60) series, &lsquo;<samp><span class="samp">m32cm</span></samp>&rsquo; for the M16C/80 series, or &lsquo;<samp><span class="samp">m32c</span></samp>&rsquo; for
the M32C/80 series.

     <br><dt><code>-msim</code><dd><a name="index-msim-1431"></a>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.

     <br><dt><code>-memregs=</code><var>number</var><dd><a name="index-memregs_003d-1432"></a>Specifies the number of memory-based pseudo-registers GCC will use
during code generation.  These pseudo-registers will be used like real
registers, so there is a tradeoff between GCC'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 the default runtime libraries gcc
builds.

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