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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang's integrated assembler doesn't permit setting the target arch via -Wa,-march=armv7-a"
href="https://bugs.llvm.org/show_bug.cgi?id=48894">48894</a>
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<th>Summary</th>
<td>clang's integrated assembler doesn't permit setting the target arch via -Wa,-march=armv7-a
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ndesaulniers@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>caij2003@gmail.com, htmldeveloper@gmail.com, kristof.beyls@arm.com, llozano@chromium.org, llvm-bugs@lists.llvm.org, natechancellor@gmail.com, neeilans@live.com, richard-llvm@metafoo.co.uk, srhines@google.com
</td>
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<th>Blocks</th>
<td>4068
</td>
</tr></table>
<p>
<div>
<pre>Consider the following file:
$ cat foo.s
foo:
dmb
$ clang --target=arm-linux-gnueabi -Wa,-march=armv7-a foo.s -c
clang-12: warning: argument unused during compilation: '-Wa,-march=armv7-a'
[-Wunused-command-line-argument]
foo.s:2:3: error: instruction requires: data-barriers
dmb
^
$ cat bar.s
.arch armv7-a
foo:
dmb
$ clang --target=arm-linux-gnueabi -Wa,-march=armv7-a bar.s -c
clang-12: warning: argument unused during compilation: '-Wa,-march=armv7-a'
[-Wunused-command-line-argument]
It would seem that clang will only set the target arch via assembler directive
and not consuming the command line flag.
This is a blocker to using Clang's integrated assembler for the 32b ARM Linux
kernel.</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_CONFIRMED "
title="CONFIRMED - [Meta] Compiling the Linux kernel with clang"
href="https://bugs.llvm.org/show_bug.cgi?id=4068">Bug 4068</a>] [Meta] Compiling the Linux kernel with clang
</li>
</ul>
</div>
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