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| <title>Using the GNU Compiler Collection (GCC): C6X Options</title> |
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| <h4 class="subsection">3.17.7 C6X Options</h4> |
| <a name="index-C6X-Options"></a> |
| |
| <dl compact="compact"> |
| <dt><code>-march=<var>name</var></code></dt> |
| <dd><a name="index-march-2"></a> |
| <p>This specifies the name of the target architecture. GCC uses this |
| name to determine what kind of instructions it can emit when generating |
| assembly code. Permissible names are: ‘<samp>c62x</samp>’, |
| ‘<samp>c64x</samp>’, ‘<samp>c64x+</samp>’, ‘<samp>c67x</samp>’, ‘<samp>c67x+</samp>’, ‘<samp>c674x</samp>’. |
| </p> |
| </dd> |
| <dt><code>-mbig-endian</code></dt> |
| <dd><a name="index-mbig_002dendian-3"></a> |
| <p>Generate code for a big-endian target. |
| </p> |
| </dd> |
| <dt><code>-mlittle-endian</code></dt> |
| <dd><a name="index-mlittle_002dendian-3"></a> |
| <p>Generate code for a little-endian target. This is the default. |
| </p> |
| </dd> |
| <dt><code>-msim</code></dt> |
| <dd><a name="index-msim-1"></a> |
| <p>Choose startup files and linker script suitable for the simulator. |
| </p> |
| </dd> |
| <dt><code>-msdata=default</code></dt> |
| <dd><a name="index-msdata_003ddefault"></a> |
| <p>Put small global and static data in the ‘<samp>.neardata</samp>’ section, |
| which is pointed to by register <code>B14</code>. Put small uninitialized |
| global and static data in the ‘<samp>.bss</samp>’ section, which is adjacent |
| to the ‘<samp>.neardata</samp>’ section. Put small read-only data into the |
| ‘<samp>.rodata</samp>’ section. The corresponding sections used for large |
| pieces of data are ‘<samp>.fardata</samp>’, ‘<samp>.far</samp>’ and ‘<samp>.const</samp>’. |
| </p> |
| </dd> |
| <dt><code>-msdata=all</code></dt> |
| <dd><a name="index-msdata_003dall"></a> |
| <p>Put all data, not just small objects, into the sections reserved for |
| small data, and use addressing relative to the <code>B14</code> register to |
| access them. |
| </p> |
| </dd> |
| <dt><code>-msdata=none</code></dt> |
| <dd><a name="index-msdata_003dnone"></a> |
| <p>Make no use of the sections reserved for small data, and use absolute |
| addresses to access all data. Put all initialized global and static |
| data in the ‘<samp>.fardata</samp>’ section, and all uninitialized data in the |
| ‘<samp>.far</samp>’ section. Put all constant data into the ‘<samp>.const</samp>’ |
| section. |
| </p></dd> |
| </dl> |
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