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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - error: assembler label '' can not be undefined"
href="https://bugs.llvm.org/show_bug.cgi?id=41890">41890</a>
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<th>Summary</th>
<td>error: assembler label '' can not be undefined
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>8.0
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Windows NT
</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
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>tiagomacarios@gmail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>One of our open-source projects is failing to build with clang in 32 bits:
<a href="https://github.com/microsoft/wil/issues/7">https://github.com/microsoft/wil/issues/7</a>
I tracked down the minimal repro to be:
#include <intrin.h>
void f()
{
__annotation(L"");
__int2c();
}
clang-cl.exe -c -m32 -Zi a.cpp
error: assembler label '' can not be undefined
error: assembler label '' can not be undefined
2 errors generated.
It works fine without the -m32 flag.
RNK take on the issue:
It looks like I misclassified the label as an EH_LABEL, and some pass is
dropping it. I'm not sure why the -m32 flag matters, but I don't think it will
be hard to fix.</pre>
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