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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang++ does not produce error messages"
href="https://bugs.llvm.org/show_bug.cgi?id=37844">37844</a>
</td>
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<th>Summary</th>
<td>clang++ does not produce error messages
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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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>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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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>The code is as follow:
namespace N {
extern "C" {
extern const int foobar;
const int foobar = 1;
struct S { static const int foobar; };
const int S::foobar = 2;
}
}
int main () { return !(N::foobar + 1 == N::S::foobar); }
clang++ accepts the code, but g++ produces error messages:
conflicting declaration of ‘const int N::S::foobar’ with ‘C’ linkage
const int S::foobar = 2;
previous declaration with ‘C++’ linkage
struct S { static const int foobar; };
Indeed, the code comes from a bug report of gcc
(<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33786">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33786</a>). A previous version of g++
produces a different error message, but was fixed in the latest version. Martin
Sebor analyzed why the above code is ill-formed. Please check this problem.</pre>
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</p>
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