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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 - LLD COFF produces broken executables when locally defined symbols are imported"
href="https://bugs.llvm.org/show_bug.cgi?id=36646">36646</a>
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<th>Summary</th>
<td>LLD COFF produces broken executables when locally defined symbols are imported
</td>
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<th>Product</th>
<td>lld
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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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>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>COFF
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>kyrab@mail.ru
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Let we have foo.c:
void foo(){}
and client.c:
__declspec(dllimport) void foo();
void start(void){ foo(); }
Let's compile and link them:
cl -O2 -Zl -c foo.c
cl -O2 -Zl -c client.c
lld-link -subsystem:console -entry:start -out:ll.exe client.obj foo.obj
Resulting ll.exe then crashed.
The culprit is that underlying locally defined symbol's section is
garbage-collected. Adding '-debug' option to lld (which blocks garbage
collection) make the executable work.
I have several solutions which all work for me, but none of them looks
particularly clean and fit LLVM conventions.</pre>
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