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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Buggy note"
href="https://bugs.llvm.org/show_bug.cgi?id=38382">38382</a>
</td>
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<tr>
<th>Summary</th>
<td>Buggy note
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>abramo.bagnara@bugseng.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>$ cat a.c
extern double printf;
$ clang-7 -c a.c
a.c:1:15: error: redefinition of 'printf' as different kind of symbol
extern double printf;
^
a.c:1:15: note: unguarded header; consider using #ifdef guards or #pragma once
a.c:1:15: note: previous definition is here
1 error generated.
The first note is completely wrong (also the second is weird, but it seems a
less severe problem).</pre>
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