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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW " title="NEW --- - compiler-rt cmake configure fails on 32-bit systems" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D24222&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=-ZuCtnE5lM9xjp-jHSYIS6KuR6TPPfQg3KW0c_J43cM&s=ofGMUPVpXPjjZfBd3Cu8z6fb8F0omWKjJY4IOv--tYY&e=">24222</a>
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<th>Summary</th>
<td>compiler-rt cmake configure fails on 32-bit systems
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<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>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>hans@chromium.org
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu, popizdeh@gmail.com, samsonov@google.com
</td>
</tr>
<tr>
<th>Blocks</th>
<td>24126
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Nikola reports failing to configure compiler-rt on 32-bit OpenSUSE and Fedora
with CMake.
On Fedora, gcc targets i686 so the first stage (building compiler-rt and clang)
of a bootstrap build succeeds.
But the second stage (building with the newly built clang) fails, because Clang
does not define __i686__.
clang --version says it targets i686-pc-linux-gnu, but it doesn't define
__i686__.
On my regular x86_64 workstation, it doesn't work either:
$ bin/clang -target i686-pc-linux-gnu -v
Prints "Target: i686-pc-linux-gnu" as expected, but:
$ bin/clang -target i686-pc-linux-gnu -dM -E -c /tmp/a.c | grep i.*86
Only prints __i386__, __i386 and i386.
Isn't Clang supposed to define __i686__ when targeting i686? Am I holding it
wrong? Is compiler-rt checking the wrong thing?
On OpenSUSE, even Phase1 fails, because the system gcc is targeting i586
instead of i686:
gcc -v prints i586-suse-linux. It defines __i386__ and __i586__.
I suppose that's a different kind of bug, but it also seems related.
I have VMs for 32-bit OpenSUSE and Fedora set up. Let me know if I can help
debugging.</pre>
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