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| <h4 class="subsection">3.17.21 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-1"></a> |
| <p>Select the CPU for which code is generated. <var>name</var> may be one of |
| ‘<samp>r8c</samp>’ for the R8C/Tiny series, ‘<samp>m16c</samp>’ for the M16C (up to |
| /60) series, ‘<samp>m32cm</samp>’ for the M16C/80 series, or ‘<samp>m32c</samp>’ for |
| the M32C/80 series. |
| </p> |
| </dd> |
| <dt><code>-msim</code></dt> |
| <dd><a name="index-msim-3"></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’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’s default runtime libraries. |
| </p> |
| </dd> |
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