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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 --- - extern "C" linkage ignored for a static function"
href="http://llvm.org/bugs/show_bug.cgi?id=15744">15744</a>
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<th>Summary</th>
<td>extern "C" linkage ignored for a static function
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<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>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jbeich@tormail.org
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>A static function may be called unmangled by asm() within another function
or from a function defined entirely within asm(). The latter is what
firefox does on i386 linux and bsd e.g.,
<a href="https://mxr.mozilla.org/mozilla-central/source/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_gcc_x86_unix.cpp#85">https://mxr.mozilla.org/mozilla-central/source/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_gcc_x86_unix.cpp#85</a>
<a href="https://mxr.mozilla.org/mozilla-central/source/xpcom/reflect/xptcall/src/md/unix/xptcstubs_gcc_x86_unix.cpp#121">https://mxr.mozilla.org/mozilla-central/source/xpcom/reflect/xptcall/src/md/unix/xptcstubs_gcc_x86_unix.cpp#121</a>
// a simple testcase
extern "C"
{
__attribute__((__used__))
static void
foo(void)
{
}
}
asm("call foo");
$ clang++33 -c test.cc
$ objdump -t test.o | fgrep foo
0000000000000010 l F .text 0000000000000006 _Z3foov
0000000000000000 *UND* 0000000000000000 foo
$ clang++32 -c test.cc
$ objdump -t test.o | fgrep foo
0000000000000010 l F .text 0000000000000001 foo
$ g++48 -c test.cc
$ objdump -t test.o | fgrep foo
0000000000000000 l F .text 0000000000000006 foo</pre>
</div>
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