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| <title>Using the GNU Compiler Collection (GCC): CRIS Options</title> |
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| <a name="CRIS-Options"></a> |
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| Next: <a href="CR16-Options.html#CR16-Options" accesskey="n" rel="next">CR16 Options</a>, Previous: <a href="C6X-Options.html#C6X-Options" accesskey="p" rel="prev">C6X 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="CRIS-Options-1"></a> |
| <h4 class="subsection">3.17.8 CRIS Options</h4> |
| <a name="index-CRIS-Options"></a> |
| |
| <p>These options are defined specifically for the CRIS ports. |
| </p> |
| <dl compact="compact"> |
| <dt><code>-march=<var>architecture-type</var></code></dt> |
| <dt><code>-mcpu=<var>architecture-type</var></code></dt> |
| <dd><a name="index-march-3"></a> |
| <a name="index-mcpu-3"></a> |
| <p>Generate code for the specified architecture. The choices for |
| <var>architecture-type</var> are ‘<samp>v3</samp>’, ‘<samp>v8</samp>’ and ‘<samp>v10</samp>’ for |
| respectively ETRAX <!-- /@w -->4, ETRAX <!-- /@w -->100, and ETRAX <!-- /@w -->100 <!-- /@w -->LX. |
| Default is ‘<samp>v0</samp>’ except for cris-axis-linux-gnu, where the default is |
| ‘<samp>v10</samp>’. |
| </p> |
| </dd> |
| <dt><code>-mtune=<var>architecture-type</var></code></dt> |
| <dd><a name="index-mtune-4"></a> |
| <p>Tune to <var>architecture-type</var> everything applicable about the generated |
| code, except for the ABI and the set of available instructions. The |
| choices for <var>architecture-type</var> are the same as for |
| <samp>-march=<var>architecture-type</var></samp>. |
| </p> |
| </dd> |
| <dt><code>-mmax-stack-frame=<var>n</var></code></dt> |
| <dd><a name="index-mmax_002dstack_002dframe"></a> |
| <p>Warn when the stack frame of a function exceeds <var>n</var> bytes. |
| </p> |
| </dd> |
| <dt><code>-metrax4</code></dt> |
| <dt><code>-metrax100</code></dt> |
| <dd><a name="index-metrax4"></a> |
| <a name="index-metrax100"></a> |
| <p>The options <samp>-metrax4</samp> and <samp>-metrax100</samp> are synonyms for |
| <samp>-march=v3</samp> and <samp>-march=v8</samp> respectively. |
| </p> |
| </dd> |
| <dt><code>-mmul-bug-workaround</code></dt> |
| <dt><code>-mno-mul-bug-workaround</code></dt> |
| <dd><a name="index-mmul_002dbug_002dworkaround"></a> |
| <a name="index-mno_002dmul_002dbug_002dworkaround"></a> |
| <p>Work around a bug in the <code>muls</code> and <code>mulu</code> instructions for CPU |
| models where it applies. This option is active by default. |
| </p> |
| </dd> |
| <dt><code>-mpdebug</code></dt> |
| <dd><a name="index-mpdebug"></a> |
| <p>Enable CRIS-specific verbose debug-related information in the assembly |
| code. This option also has the effect of turning off the ‘<samp>#NO_APP</samp>’ |
| formatted-code indicator to the assembler at the beginning of the |
| assembly file. |
| </p> |
| </dd> |
| <dt><code>-mcc-init</code></dt> |
| <dd><a name="index-mcc_002dinit"></a> |
| <p>Do not use condition-code results from previous instruction; always emit |
| compare and test instructions before use of condition codes. |
| </p> |
| </dd> |
| <dt><code>-mno-side-effects</code></dt> |
| <dd><a name="index-mno_002dside_002deffects"></a> |
| <p>Do not emit instructions with side effects in addressing modes other than |
| post-increment. |
| </p> |
| </dd> |
| <dt><code>-mstack-align</code></dt> |
| <dt><code>-mno-stack-align</code></dt> |
| <dt><code>-mdata-align</code></dt> |
| <dt><code>-mno-data-align</code></dt> |
| <dt><code>-mconst-align</code></dt> |
| <dt><code>-mno-const-align</code></dt> |
| <dd><a name="index-mstack_002dalign"></a> |
| <a name="index-mno_002dstack_002dalign"></a> |
| <a name="index-mdata_002dalign"></a> |
| <a name="index-mno_002ddata_002dalign"></a> |
| <a name="index-mconst_002dalign"></a> |
| <a name="index-mno_002dconst_002dalign"></a> |
| <p>These options (‘<samp>no-</samp>’ options) arrange (eliminate arrangements) for the |
| stack frame, individual data and constants to be aligned for the maximum |
| single data access size for the chosen CPU model. The default is to |
| arrange for 32-bit alignment. ABI details such as structure layout are |
| not affected by these options. |
| </p> |
| </dd> |
| <dt><code>-m32-bit</code></dt> |
| <dt><code>-m16-bit</code></dt> |
| <dt><code>-m8-bit</code></dt> |
| <dd><a name="index-m32_002dbit"></a> |
| <a name="index-m16_002dbit"></a> |
| <a name="index-m8_002dbit"></a> |
| <p>Similar to the stack- data- and const-align options above, these options |
| arrange for stack frame, writable data and constants to all be 32-bit, |
| 16-bit or 8-bit aligned. The default is 32-bit alignment. |
| </p> |
| </dd> |
| <dt><code>-mno-prologue-epilogue</code></dt> |
| <dt><code>-mprologue-epilogue</code></dt> |
| <dd><a name="index-mno_002dprologue_002depilogue"></a> |
| <a name="index-mprologue_002depilogue"></a> |
| <p>With <samp>-mno-prologue-epilogue</samp>, the normal function prologue and |
| epilogue which set up the stack frame are omitted and no return |
| instructions or return sequences are generated in the code. Use this |
| option only together with visual inspection of the compiled code: no |
| warnings or errors are generated when call-saved registers must be saved, |
| or storage for local variables needs to be allocated. |
| </p> |
| </dd> |
| <dt><code>-mno-gotplt</code></dt> |
| <dt><code>-mgotplt</code></dt> |
| <dd><a name="index-mno_002dgotplt"></a> |
| <a name="index-mgotplt"></a> |
| <p>With <samp>-fpic</samp> and <samp>-fPIC</samp>, don’t generate (do generate) |
| instruction sequences that load addresses for functions from the PLT part |
| of the GOT rather than (traditional on other architectures) calls to the |
| PLT. The default is <samp>-mgotplt</samp>. |
| </p> |
| </dd> |
| <dt><code>-melf</code></dt> |
| <dd><a name="index-melf"></a> |
| <p>Legacy no-op option only recognized with the cris-axis-elf and |
| cris-axis-linux-gnu targets. |
| </p> |
| </dd> |
| <dt><code>-mlinux</code></dt> |
| <dd><a name="index-mlinux"></a> |
| <p>Legacy no-op option only recognized with the cris-axis-linux-gnu target. |
| </p> |
| </dd> |
| <dt><code>-sim</code></dt> |
| <dd><a name="index-sim"></a> |
| <p>This option, recognized for the cris-axis-elf, arranges |
| to link with input-output functions from a simulator library. Code, |
| initialized data and zero-initialized data are allocated consecutively. |
| </p> |
| </dd> |
| <dt><code>-sim2</code></dt> |
| <dd><a name="index-sim2"></a> |
| <p>Like <samp>-sim</samp>, but pass linker options to locate initialized data at |
| 0x40000000 and zero-initialized data at 0x80000000. |
| </p></dd> |
| </dl> |
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