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110 lines
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<title>Alpha Options - Using as</title>
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<link rel="up" href="Alpha_002dDependent.html#Alpha_002dDependent" title="Alpha-Dependent">
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<link rel="prev" href="Alpha-Notes.html#Alpha-Notes" title="Alpha Notes">
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This file documents the GNU Assembler "as".
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Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002,
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2006, 2007 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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<div class="node">
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<p>
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<a name="Alpha-Options"></a>Next: <a rel="next" accesskey="n" href="Alpha-Syntax.html#Alpha-Syntax">Alpha Syntax</a>,
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Previous: <a rel="previous" accesskey="p" href="Alpha-Notes.html#Alpha-Notes">Alpha Notes</a>,
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Up: <a rel="up" accesskey="u" href="Alpha_002dDependent.html#Alpha_002dDependent">Alpha-Dependent</a>
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<hr><br>
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</div>
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<h4 class="subsection">9.1.2 Options</h4>
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<p><a name="index-Alpha-options-509"></a><a name="index-options-for-Alpha-510"></a>
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<a name="index-_0040code_007b_002dm_0040var_007bcpu_007d_007d-command-line-option_002c-Alpha-511"></a>
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<dl><dt><span class="option">-m</span><var>cpu</var><dd>This option specifies the target processor. If an attempt is made to
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assemble an instruction which will not execute on the target processor,
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the assembler may either expand the instruction as a macro or issue an
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error message. This option is equivalent to the <code>.arch</code> directive.
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<p>The following processor names are recognized:
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<code>21064</code>,
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<code>21064a</code>,
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<code>21066</code>,
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<code>21068</code>,
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<code>21164</code>,
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<code>21164a</code>,
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<code>21164pc</code>,
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<code>21264</code>,
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<code>21264a</code>,
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<code>21264b</code>,
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<code>ev4</code>,
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<code>ev5</code>,
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<code>lca45</code>,
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<code>ev5</code>,
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<code>ev56</code>,
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<code>pca56</code>,
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<code>ev6</code>,
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<code>ev67</code>,
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<code>ev68</code>.
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The special name <code>all</code> may be used to allow the assembler to accept
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instructions valid for any Alpha processor.
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<p>In order to support existing practice in OSF/1 with respect to <code>.arch</code>,
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and existing practice within <span class="command">MILO</span> (the Linux ARC bootloader), the
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numbered processor names (e.g. 21064) enable the processor-specific PALcode
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instructions, while the “electro-vlasic” names (e.g. <code>ev4</code>) do not.
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<p><a name="index-_0040code_007b_002dmdebug_007d-command-line-option_002c-Alpha-512"></a><a name="index-_0040code_007b_002dno_002dmdebug_007d-command-line-option_002c-Alpha-513"></a><br><dt><span class="option">-mdebug</span><dt><span class="option">-no-mdebug</span><dd>Enables or disables the generation of <code>.mdebug</code> encapsulation for
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stabs directives and procedure descriptors. The default is to automatically
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enable <code>.mdebug</code> when the first stabs directive is seen.
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<p><a name="index-_0040code_007b_002drelax_007d-command-line-option_002c-Alpha-514"></a><br><dt><span class="option">-relax</span><dd>This option forces all relocations to be put into the object file, instead
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of saving space and resolving some relocations at assembly time. Note that
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this option does not propagate all symbol arithmetic into the object file,
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because not all symbol arithmetic can be represented. However, the option
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can still be useful in specific applications.
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<p><a name="index-_0040code_007b_002dg_007d-command-line-option_002c-Alpha-515"></a><br><dt><span class="option">-g</span><dd>This option is used when the compiler generates debug information. When
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<span class="command">gcc</span> is using <span class="command">mips-tfile</span> to generate debug
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information for ECOFF, local labels must be passed through to the object
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file. Otherwise this option has no effect.
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<p><a name="index-_0040code_007b_002dG_007d-command-line-option_002c-Alpha-516"></a><br><dt><span class="option">-G</span><var>size</var><dd>A local common symbol larger than <var>size</var> is placed in <code>.bss</code>,
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while smaller symbols are placed in <code>.sbss</code>.
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<p><a name="index-_0040code_007b_002dF_007d-command-line-option_002c-Alpha-517"></a><a name="index-_0040code_007b_002d32addr_007d-command-line-option_002c-Alpha-518"></a><br><dt><span class="option">-F</span><dt><span class="option">-32addr</span><dd>These options are ignored for backward compatibility.
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</dl>
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<p><a name="index-Alpha-Syntax-519"></a>
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</body></html>
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