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<title>Using the GNU Compiler Collection (GCC): C6X Options</title>
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Next: <a href="CRIS-Options.html#CRIS-Options" accesskey="n" rel="next">CRIS Options</a>, Previous: <a href="Blackfin-Options.html#Blackfin-Options" accesskey="p" rel="prev">Blackfin 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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<a name="C6X-Options-1"></a>
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<h4 class="subsection">3.18.7 C6X Options</h4>
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<a name="index-C6X-Options"></a>
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<dl compact="compact">
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<dt><code>-march=<var>name</var></code></dt>
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<dd><a name="index-march-2"></a>
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<p>This specifies the name of the target architecture. GCC uses this
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name to determine what kind of instructions it can emit when generating
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assembly code. Permissible names are: ‘<samp>c62x</samp>’,
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‘<samp>c64x</samp>’, ‘<samp>c64x+</samp>’, ‘<samp>c67x</samp>’, ‘<samp>c67x+</samp>’, ‘<samp>c674x</samp>’.
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</p>
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</dd>
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<dt><code>-mbig-endian</code></dt>
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<dd><a name="index-mbig_002dendian-3"></a>
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<p>Generate code for a big-endian target.
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</p>
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</dd>
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<dt><code>-mlittle-endian</code></dt>
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<dd><a name="index-mlittle_002dendian-3"></a>
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<p>Generate code for a little-endian target. This is the default.
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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-1"></a>
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<p>Choose startup files and linker script suitable for the simulator.
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</p>
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</dd>
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<dt><code>-msdata=default</code></dt>
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<dd><a name="index-msdata_003ddefault"></a>
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<p>Put small global and static data in the <code>.neardata</code> section,
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which is pointed to by register <code>B14</code>. Put small uninitialized
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global and static data in the <code>.bss</code> section, which is adjacent
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to the <code>.neardata</code> section. Put small read-only data into the
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<code>.rodata</code> section. The corresponding sections used for large
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pieces of data are <code>.fardata</code>, <code>.far</code> and <code>.const</code>.
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</p>
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</dd>
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<dt><code>-msdata=all</code></dt>
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<dd><a name="index-msdata_003dall"></a>
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<p>Put all data, not just small objects, into the sections reserved for
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small data, and use addressing relative to the <code>B14</code> register to
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access them.
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</p>
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</dd>
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<dt><code>-msdata=none</code></dt>
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<dd><a name="index-msdata_003dnone"></a>
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<p>Make no use of the sections reserved for small data, and use absolute
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addresses to access all data. Put all initialized global and static
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data in the <code>.fardata</code> section, and all uninitialized data in the
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<code>.far</code> section. Put all constant data into the <code>.const</code>
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section.
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</p></dd>
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</dl>
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