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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - static object mangling conflicts"
href="https://bugs.llvm.org/show_bug.cgi?id=37885">37885</a>
</td>
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<tr>
<th>Summary</th>
<td>static object mangling conflicts
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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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>C++
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>zhonghao@pku.org.cn
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>I found that gcc+ produces errors when it compiles the following code:
extern "C" void abort();
static int i;
int *p = &i;
int main()
{
int i;
{
extern int i;
i = 1;
*p = 2;
if (i == 2)
abort ();
}
return 0;
}
When compiling the above code, clang++ does not produce any errors. The code
comes from <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - clang should probably mangle statics"
href="show_bug.cgi?id=5966">https://bugs.llvm.org/show_bug.cgi?id=5966</a>
Indeed, the situation is more complicated. The above bug report of clang says
that the code comes from a bug report of gcc:
<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31775">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31775</a>
I reported the difference to gcc:
<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86181">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86181</a>
After reading the bug report, Richard Biener made the following comment: "I
think the clang bug is incomplete and misses the 2nd TU which defines i. So
GCC works (and the testcase is in the testsuite)."
Is this a recurring bug in clang? Hope that the comment from Richard Biener can
further improve clang.</pre>
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</p>
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