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<h4 class="subsection">3.17.27 MN10300 Options</h4>
<p><a name="index-MN10300-options-2086"></a>
These <samp><span class="option">-m</span></samp> options are defined for Matsushita MN10300 architectures:
<dl>
<dt><code>-mmult-bug</code><dd><a name="index-mmult_002dbug-2087"></a>Generate code to avoid bugs in the multiply instructions for the MN10300
processors. This is the default.
<br><dt><code>-mno-mult-bug</code><dd><a name="index-mno_002dmult_002dbug-2088"></a>Do not generate code to avoid bugs in the multiply instructions for the
MN10300 processors.
<br><dt><code>-mam33</code><dd><a name="index-mam33-2089"></a>Generate code using features specific to the AM33 processor.
<br><dt><code>-mno-am33</code><dd><a name="index-mno_002dam33-2090"></a>Do not generate code using features specific to the AM33 processor. This
is the default.
<br><dt><code>-mam33-2</code><dd><a name="index-mam33_002d2-2091"></a>Generate code using features specific to the AM33/2.0 processor.
<br><dt><code>-mam34</code><dd><a name="index-mam34-2092"></a>Generate code using features specific to the AM34 processor.
<br><dt><code>-mtune=</code><var>cpu-type</var><dd><a name="index-mtune-2093"></a>Use the timing characteristics of the indicated CPU type when
scheduling instructions. This does not change the targeted processor
type. The CPU type must be one of ‘<samp><span class="samp">mn10300</span></samp>’, ‘<samp><span class="samp">am33</span></samp>’,
‘<samp><span class="samp">am33-2</span></samp>’ or ‘<samp><span class="samp">am34</span></samp>’.
<br><dt><code>-mreturn-pointer-on-d0</code><dd><a name="index-mreturn_002dpointer_002don_002dd0-2094"></a>When generating a function that returns a pointer, return the pointer
in both <code>a0</code> and <code>d0</code>. Otherwise, the pointer is returned
only in <code>a0</code>, and attempts to call such functions without a prototype
result in errors. Note that this option is on by default; use
<samp><span class="option">-mno-return-pointer-on-d0</span></samp> to disable it.
<br><dt><code>-mno-crt0</code><dd><a name="index-mno_002dcrt0-2095"></a>Do not link in the C run-time initialization object file.
<br><dt><code>-mrelax</code><dd><a name="index-mrelax-2096"></a>Indicate to the linker that it should perform a relaxation optimization pass
to shorten branches, calls and absolute memory addresses. This option only
has an effect when used on the command line for the final link step.
<p>This option makes symbolic debugging impossible.
<br><dt><code>-mliw</code><dd><a name="index-mliw-2097"></a>Allow the compiler to generate <em>Long Instruction Word</em>
instructions if the target is the ‘<samp><span class="samp">AM33</span></samp>’ or later. This is the
default. This option defines the preprocessor macro <code>__LIW__</code>.
<br><dt><code>-mnoliw</code><dd><a name="index-mnoliw-2098"></a>Do not allow the compiler to generate <em>Long Instruction Word</em>
instructions. This option defines the preprocessor macro
<code>__NO_LIW__</code>.
<br><dt><code>-msetlb</code><dd><a name="index-msetlb-2099"></a>Allow the compiler to generate the <em>SETLB</em> and <em>Lcc</em>
instructions if the target is the ‘<samp><span class="samp">AM33</span></samp>’ or later. This is the
default. This option defines the preprocessor macro <code>__SETLB__</code>.
<br><dt><code>-mnosetlb</code><dd><a name="index-mnosetlb-2100"></a>Do not allow the compiler to generate <em>SETLB</em> or <em>Lcc</em>
instructions. This option defines the preprocessor macro
<code>__NO_SETLB__</code>.
</dl>
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