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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Building scudo trunk"
href="https://bugs.llvm.org/show_bug.cgi?id=47323">47323</a>
</td>
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<th>Summary</th>
<td>Building scudo trunk
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>scudo
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>josh@joshtriplett.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>I tried to build scudo from LLVM trunk (commit
486ed885339d70cd71ee55567282a43cce28d763), following the instructions on
<a href="https://www.llvm.org/docs/ScudoHardenedAllocator.html">https://www.llvm.org/docs/ScudoHardenedAllocator.html</a> (under "You may also
build Scudo like this:"). (I had to make the slight modification of changing cc
to cpp when referencing sanitizer_common.)
I ended up with this error:
ld.lld: error: relocation R_X86_64_PC32 cannot be used against symbol
__interception::real_vfork; recompile with -fPIC
<span class="quote">>>> defined in /tmp/sanitizer_common_interceptors_vfork_x86_64-5badfa.o
>>> referenced by /tmp/sanitizer_common_interceptors_vfork_x86_64-5badfa.o:(vfork)</span >
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I get the same error (other than symbol encoding) if I build with ld:
/usr/bin/ld: /tmp/sanitizer_common_interceptors_vfork_x86_64-01b7d5.o: warning:
relocation against `_ZN14__interception10real_vforkE' in read-only section
`.text'
/usr/bin/ld: /tmp/sanitizer_common_interceptors_vfork_x86_64-01b7d5.o:
relocation R_X86_64_PC32 against symbol `_ZN14__interception10real_vforkE' can
not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: bad value
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I used this command line:
clang++-11 -fPIC -std=c++11 -msse4.2 -O2 -I. scudo/*.cpp $(\ls
sanitizer_common/*.{cpp,S} | grep -v
"sanitizer_termination\|sanitizer_common_nolibc\|sancov_\|sanitizer_unwind\|sanitizer_symbol")
-shared -o libscudo.so -pthread</pre>
</div>
</p>
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