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<title>Using the GNU Compiler Collection (GCC): MCore Options</title>
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<a name="MCore-Options"></a>
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<p>
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Next: <a href="MeP-Options.html#MeP-Options" accesskey="n" rel="next">MeP Options</a>, Previous: <a href="M680x0-Options.html#M680x0-Options" accesskey="p" rel="prev">M680x0 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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<hr>
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<a name="MCore-Options-1"></a>
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<h4 class="subsection">3.18.23 MCore Options</h4>
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<a name="index-MCore-options"></a>
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<p>These are the ‘<samp>-m</samp>’ options defined for the Motorola M*Core
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processors.
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</p>
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<dl compact="compact">
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<dt><code>-mhardlit</code></dt>
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<dt><code>-mno-hardlit</code></dt>
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<dd><a name="index-mhardlit"></a>
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<a name="index-mno_002dhardlit"></a>
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<p>Inline constants into the code stream if it can be done in two
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instructions or less.
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</p>
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</dd>
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<dt><code>-mdiv</code></dt>
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<dt><code>-mno-div</code></dt>
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<dd><a name="index-mdiv-1"></a>
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<a name="index-mno_002ddiv-1"></a>
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<p>Use the divide instruction. (Enabled by default).
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</p>
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</dd>
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<dt><code>-mrelax-immediate</code></dt>
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<dt><code>-mno-relax-immediate</code></dt>
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<dd><a name="index-mrelax_002dimmediate"></a>
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<a name="index-mno_002drelax_002dimmediate"></a>
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<p>Allow arbitrary-sized immediates in bit operations.
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</p>
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</dd>
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<dt><code>-mwide-bitfields</code></dt>
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<dt><code>-mno-wide-bitfields</code></dt>
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<dd><a name="index-mwide_002dbitfields"></a>
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<a name="index-mno_002dwide_002dbitfields"></a>
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<p>Always treat bit-fields as <code>int</code>-sized.
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</p>
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</dd>
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<dt><code>-m4byte-functions</code></dt>
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<dt><code>-mno-4byte-functions</code></dt>
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<dd><a name="index-m4byte_002dfunctions"></a>
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<a name="index-mno_002d4byte_002dfunctions"></a>
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<p>Force all functions to be aligned to a 4-byte boundary.
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</p>
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</dd>
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<dt><code>-mcallgraph-data</code></dt>
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<dt><code>-mno-callgraph-data</code></dt>
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<dd><a name="index-mcallgraph_002ddata"></a>
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<a name="index-mno_002dcallgraph_002ddata"></a>
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<p>Emit callgraph information.
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</p>
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</dd>
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<dt><code>-mslow-bytes</code></dt>
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<dt><code>-mno-slow-bytes</code></dt>
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<dd><a name="index-mslow_002dbytes"></a>
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<a name="index-mno_002dslow_002dbytes"></a>
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<p>Prefer word access when reading byte quantities.
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</p>
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</dd>
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<dt><code>-mlittle-endian</code></dt>
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<dt><code>-mbig-endian</code></dt>
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<dd><a name="index-mlittle_002dendian-5"></a>
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<a name="index-mbig_002dendian-5"></a>
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<p>Generate code for a little-endian target.
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</p>
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</dd>
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<dt><code>-m210</code></dt>
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<dt><code>-m340</code></dt>
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<dd><a name="index-m210"></a>
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<a name="index-m340"></a>
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<p>Generate code for the 210 processor.
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</p>
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</dd>
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<dt><code>-mno-lsim</code></dt>
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<dd><a name="index-mno_002dlsim-1"></a>
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<p>Assume that runtime support has been provided and so omit the
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simulator library (<samp>libsim.a)</samp> from the linker command line.
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</p>
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</dd>
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<dt><code>-mstack-increment=<var>size</var></code></dt>
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<dd><a name="index-mstack_002dincrement"></a>
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<p>Set the maximum amount for a single stack increment operation. Large
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values can increase the speed of programs that contain functions
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that need a large amount of stack space, but they can also trigger a
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segmentation fault if the stack is extended too much. The default
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value is 0x1000.
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</p>
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</dd>
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</dl>
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