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| <title>Using the GNU Compiler Collection (GCC): H8/300 Options</title> |
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| <h4 class="subsection">3.17.15 H8/300 Options</h4> |
| |
| <p>These ‘<samp>-m</samp>’ options are defined for the H8/300 implementations: |
| </p> |
| <dl compact="compact"> |
| <dt><code>-mrelax</code></dt> |
| <dd><a name="index-mrelax-1"></a> |
| <p>Shorten some address references at link time, when possible; uses the |
| linker option <samp>-relax</samp>. See <a href="http://sourceware.org/binutils/docs/ld/H8_002f300.html#H8_002f300"><code>ld</code> and the H8/300</a> in <cite>Using ld</cite>, for a fuller description. |
| </p> |
| </dd> |
| <dt><code>-mh</code></dt> |
| <dd><a name="index-mh"></a> |
| <p>Generate code for the H8/300H. |
| </p> |
| </dd> |
| <dt><code>-ms</code></dt> |
| <dd><a name="index-ms"></a> |
| <p>Generate code for the H8S. |
| </p> |
| </dd> |
| <dt><code>-mn</code></dt> |
| <dd><a name="index-mn"></a> |
| <p>Generate code for the H8S and H8/300H in the normal mode. This switch |
| must be used either with <samp>-mh</samp> or <samp>-ms</samp>. |
| </p> |
| </dd> |
| <dt><code>-ms2600</code></dt> |
| <dd><a name="index-ms2600"></a> |
| <p>Generate code for the H8S/2600. This switch must be used with <samp>-ms</samp>. |
| </p> |
| </dd> |
| <dt><code>-mexr</code></dt> |
| <dd><a name="index-mexr"></a> |
| <p>Extended registers are stored on stack before execution of function |
| with monitor attribute. Default option is <samp>-mexr</samp>. |
| This option is valid only for H8S targets. |
| </p> |
| </dd> |
| <dt><code>-mno-exr</code></dt> |
| <dd><a name="index-mno_002dexr"></a> |
| <p>Extended registers are not stored on stack before execution of function |
| with monitor attribute. Default option is <samp>-mno-exr</samp>. |
| This option is valid only for H8S targets. |
| </p> |
| </dd> |
| <dt><code>-mint32</code></dt> |
| <dd><a name="index-mint32-1"></a> |
| <p>Make <code>int</code> data 32 bits by default. |
| </p> |
| </dd> |
| <dt><code>-malign-300</code></dt> |
| <dd><a name="index-malign_002d300"></a> |
| <p>On the H8/300H and H8S, use the same alignment rules as for the H8/300. |
| The default for the H8/300H and H8S is to align longs and floats on |
| 4-byte boundaries. |
| <samp>-malign-300</samp> causes them to be aligned on 2-byte boundaries. |
| This option has no effect on the H8/300. |
| </p></dd> |
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