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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ThinLTO, relocation refers to discard section"
href="https://bugs.llvm.org/show_bug.cgi?id=32980">32980</a>
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<th>Summary</th>
<td>ThinLTO, relocation refers to discard section
</td>
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<th>Product</th>
<td>new-bugs
</td>
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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>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>dcallahan@fb.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>A ThinLTO build of a quite large application is generating a warning from the
linker
./boost/exception/detail/exception_ptr.hpp:143: warning: relocation refers
to discarded section
and the binary faults during static construction by trying access location 0.
=> 0x0000000006f31fd1
<_GLOBAL__sub_I__ZN5boost6detail16thread_data_baseD2Ev()+33>: cmpb
$0x0,-0x6f31fd8(%rip) # 0x0
I have verified this problem exists in the current trunk as well.
I would love to work on reducing the problem but am uncertain how to get going.
How do I determine which section is being discarded and why?
Assuming this is a duplicate COMDAT, is the relocation supposed to be fixed? If
so where?
There are a lot of these warnings. The most unusual aspect of the build is the
presence of “—whole-archive” link commands although I don’t how that would
present a problem to ThinLTO.</pre>
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