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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 --- - clang-cl doesn't forward declare a struct when it first sees it in the list of arguments in C mode"
href="http://llvm.org/bugs/show_bug.cgi?id=20178">20178</a>
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<th>Summary</th>
<td>clang-cl doesn't forward declare a struct when it first sees it in the list of arguments in C mode
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</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>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ehsan@mozilla.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>$ cat test.c
void f(struct foo*);
struct foo { int x; };
void f(struct foo* f) {}
$ cl -c test.c
$ clang-cl -c test.c
test.c(1,15) : warning: declaration of 'struct foo' will not be visible
outside of this function [-Wvisibility]
void f(struct foo*);
^
test.c(3,6) : error: conflicting types for 'f'
void f(struct foo* f) {}
^
test.c(1,6) : note: previous declaration is here
void f(struct foo*);
^
1 warning and 1 error generated.
clang-cl accepts this program in C++ mode.</pre>
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</p>
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