117 lines
5.0 KiB
HTML
117 lines
5.0 KiB
HTML
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<head>
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<title>Using the GNU Compiler Collection (GCC): M32C Options</title>
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<meta name="description" content="Using the GNU Compiler Collection (GCC): M32C Options">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Submodel-Options.html#Submodel-Options" rel="up" title="Submodel Options">
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<link href="M32R_002fD-Options.html#M32R_002fD-Options" rel="next" title="M32R/D Options">
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<link href="LM32-Options.html#LM32-Options" rel="prev" title="LM32 Options">
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<a name="M32C-Options"></a>
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<p>
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Next: <a href="M32R_002fD-Options.html#M32R_002fD-Options" accesskey="n" rel="next">M32R/D Options</a>, Previous: <a href="LM32-Options.html#LM32-Options" accesskey="p" rel="prev">LM32 Options</a>, Up: <a href="Submodel-Options.html#Submodel-Options" accesskey="u" rel="up">Submodel Options</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="M32C-Options-1"></a>
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<h4 class="subsection">3.18.20 M32C Options</h4>
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<a name="index-M32C-options"></a>
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<dl compact="compact">
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<dt><code>-mcpu=<var>name</var></code></dt>
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<dd><a name="index-mcpu_003d-1"></a>
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<p>Select the CPU for which code is generated. <var>name</var> may be one of
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‘<samp>r8c</samp>’ for the R8C/Tiny series, ‘<samp>m16c</samp>’ for the M16C (up to
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/60) series, ‘<samp>m32cm</samp>’ for the M16C/80 series, or ‘<samp>m32c</samp>’ for
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the M32C/80 series.
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</p>
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</dd>
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<dt><code>-msim</code></dt>
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<dd><a name="index-msim-4"></a>
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<p>Specifies that the program will be run on the simulator. This causes
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an alternate runtime library to be linked in which supports, for
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example, file I/O. You must not use this option when generating
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programs that will run on real hardware; you must provide your own
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runtime library for whatever I/O functions are needed.
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</p>
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</dd>
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<dt><code>-memregs=<var>number</var></code></dt>
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<dd><a name="index-memregs_003d"></a>
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<p>Specifies the number of memory-based pseudo-registers GCC uses
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during code generation. These pseudo-registers are used like real
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registers, so there is a tradeoff between GCC’s ability to fit the
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code into available registers, and the performance penalty of using
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memory instead of registers. Note that all modules in a program must
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be compiled with the same value for this option. Because of that, you
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must not use this option with GCC’s default runtime libraries.
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</p>
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</dd>
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</dl>
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</body>
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