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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - set default values for -march and -mtune"
href="https://bugs.llvm.org/show_bug.cgi?id=52242">52242</a>
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<th>Summary</th>
<td>set default values for -march and -mtune
</td>
</tr>
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<th>Product</th>
<td>Build scripts
</td>
</tr>
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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>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>cmake
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>chinoune.mehdi@hotmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>gcc has configuration options that set default values [1] for -march and
-mtune.
It would be useful to add an equivalent one to Clang.
I need this to setup a developement environnement where clang default to
-march=-x86-64-v3
[1]
<a href="https://gcc.gnu.org/install/configure.html">https://gcc.gnu.org/install/configure.html</a>
--with-schedule=cpu
--with-arch=cpu
--with-arch-32=cpu
--with-arch-64=cpu
--with-tune=cpu
--with-tune-32=cpu
--with-tune-64=cpu
--with-abi=abi
--with-fpu=type
--with-float=type
These configure options provide default values for the -mschedule=, -march=,
-mtune=, -mabi=, and -mfpu= options and for -mhard-float or -msoft-float. As
with --with-cpu, which switches will be accepted and acceptable values of the
arguments depend on the target.</pre>
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</p>
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