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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - -fsanitize=undefined links parts of libsanitizer into DSOs on Linux"
href="http://llvm.org/bugs/show_bug.cgi?id=18211">18211</a>
</td>
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<th>Summary</th>
<td>-fsanitize=undefined links parts of libsanitizer into DSOs on Linux
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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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>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Keywords</th>
<td>Sanitizer
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Driver
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>glider@google.com
</td>
</tr>
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<th>CC</th>
<td>eugeni.stepanov@gmail.com, kcc@google.com, llvmbugs@cs.uiuc.edu, nlewycky@google.com
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>$ cat t.c
int foo() { return 2; }
$ cat a.c
extern int foo();
int main() { return foo(); }
$ TOOLS="-fsanitize=address -fsanitize=undefined"
$ clang t.c -shared -o t.so -fPIC $TOOLS
$ clang a.c -o a t.so $TOOLS
/usr/bin/ld: a: hidden symbol `pthread_self2' in
/usr/local/google/asan/llvm/llvm_cmake_build/bin/../lib/clang/3.5/lib/linux/libclang_rt.asan-x86_64.a(sanitizer_linux.cc.o)
is referenced by DSO
/usr/bin/ld: final link failed: Bad value
clang-3.4: error: linker command failed with exit code 1 (use -v to see
invocation)
If TOOLS is set to either "-fsanitize=address" or "-fsanitize=undefined" the
linking succeeds.</pre>
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