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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - don't err on ".att_syntax prefix""
href="http://llvm.org/bugs/show_bug.cgi?id=18916">18916</a>
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<th>Summary</th>
<td>don't err on ".att_syntax prefix"
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>MC
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>nlewycky@google.com
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</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The ".{intel,att}_syntax [no]prefix" directives are documented here:
<a href="https://sourceware.org/binutils/docs-2.24/as/i386_002dVariations.html#i386_002dVariations">https://sourceware.org/binutils/docs-2.24/as/i386_002dVariations.html#i386_002dVariations</a>
and we don't currently appear to support them:
$ cat 1.s
.att_syntax prefix
$ llvm/Debug+Asserts/bin/clang 1.s
1.s:1:13: error: invalid instruction mnemonic 'prefix'
.att_syntax prefix
^~~~~~
$ gcc 1.s
/usr/lib/x86_64-linux-gnu/crt1.o(.text+0x20): error: undefined reference to
'main'
collect2: error: ld returned 1 exit status</pre>
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